Having Particulate Or Fibrous Porous Mass Including A Sintered Mass Patents (Class 429/235)
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Patent number: 8609287Abstract: Compounds may have general Formula I, II, or III: where R1, R2, R3, and R4 are independently H, F, Cl, Br, CN, NO2, a alkyl group, a haloalkyl group, a phosphate group, a polyether group; or R1 and R2, or R3 and R4, or R2 and R3 (in the case of Formula II) may join together to form a fused ring on the benzene ring; and X and Z are independently a group of Formula A: where R5 and R6 and R7 are independently H, F, Cl, Br, CN, NO2, a alkyl group, a haloalkyl group, a phosphate group, or a polyether group; R7 is H, F, Cl, Br, CN, NO2, a alkyl group, a haloalkyl group, a phosphate group, or a polyether group; n is an integer from 1 to 8; and m is an integer from 1 to 13. Such compounds may be used as redox shuttles in electrolytes for use in electrochemical cells, batteries and electronic devices.Type: GrantFiled: May 24, 2011Date of Patent: December 17, 2013Assignee: Uchicago Argonne, LLCInventors: Zhengcheng Zhang, Lu Zhang, Khalil Amine
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Patent number: 8592082Abstract: A secondary battery includes an electrode assembly, which has improved safety by reducing a density of an active material centrally positioned in the electrode assembly. In the secondary battery, an electrode assembly includes a first electrode plate, a second electrode plate and a separator between the first electrode plate and the second electrode plate, the first electrode plate including a first electrode current collector and a first active material layer on the first electrode current collector, the first active material layer including a first active material, a binder and a conductive agent, and a portion of the first active material layer at a central portion of the electrode assembly including the first active material at a lower density than a density of the first active material at a portion of the first active material layer at a peripheral portion of the electrode assembly.Type: GrantFiled: July 18, 2012Date of Patent: November 26, 2013Assignee: Samsung SDI Co., Ltd.Inventors: Chanho Lee, Kiwoon Kim, Young Ju Ahn, Jinho Lee, Junpyo Park
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Patent number: 8580438Abstract: A monolithic three-dimensional electrochemical energy storage system is provided on an aerogel or nanotube scaffold. An anode, separator, cathode, and cathodic current collector are deposited on the aerogel or nanotube scaffold.Type: GrantFiled: December 14, 2010Date of Patent: November 12, 2013Assignee: Lawrence Livermore National Security, LLCInventors: Joseph C. Farmer, Michael Stadermann
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Patent number: 8546017Abstract: Provided is a composite for anode material, a method of manufacturing the composite for anode material, and a cathode and a lithium battery that includes the composite for anode material, and more particularly, to a composite for anode material that has a large charge and discharge capacity and a high capacity retention, a method of manufacturing the composite for anode material, and a cathode and a lithium battery that includes the composite for anode material. Also, the composite for anode material in which Si or Si and carbon are distributed in silicon oxide particles is provided.Type: GrantFiled: May 30, 2008Date of Patent: October 1, 2013Assignee: Samsung SDI Co., Ltd.Inventors: Sang-kook Mah, Han-su Kim
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Patent number: 8497026Abstract: A porous metal foil of the present invention comprises a two-dimensional network structure composed of metal fibers. This porous metal foil has superior properties and can be obtained in a highly productive and cost effective manner.Type: GrantFiled: June 25, 2010Date of Patent: July 30, 2013Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Tetsuhiro Matsunaga, Hajime Watanabe, Joe Nishikawa, Tetsuro Sato
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Patent number: 8497037Abstract: It is an object of the present invention to provide an electrode using a current collector made of an aluminum porous body which is suitably used for an electrode for a nonaqueous electrolyte battery and an electrode for a capacitor, and a method for producing the electrode. In the current collector of the present invention, a strip-shaped compressed part compressed in a thickness direction is formed at one end part of a three-dimensional network aluminum porous body and a tab lead is bonded to the compressed part by welding. The width of the compressed part is 2 to 10 mm. Further, the electrode is formed by filling the current collector with an active material.Type: GrantFiled: July 2, 2012Date of Patent: July 30, 2013Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Toyama Co., Ltd.Inventors: Akihisa Hosoe, Kazuki Okuno, Hajime Ota, Koutarou Kimura, Kengo Goto, Hideaki Sakaida, Junichi Nishimura
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Patent number: 8481214Abstract: An electrode including structures configured to prevent an intercalation layer from detaching from the electrode and/or a structure configured to create a region on the electrode having a lower concentration of intercalation material. The electrode includes a support filament on which the intercalation layer is disposed. The support filament optionally has nano-scale dimensions.Type: GrantFiled: October 13, 2010Date of Patent: July 9, 2013Assignee: Catalyst Power TechnologiesInventor: Ronald Anthony Rojeski
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Patent number: 8465875Abstract: It is an object of the present invention to provide a sheet-shaped three-dimensional network aluminum porous body for a current collector which is suitably used for electrodes for nonaqueous electrolyte batteries and electrodes for capacitors, an electrode and a capacitor each using the same. In such a three-dimensional network aluminum porous body for a current collector, the aluminum porous body has been made to have a compressive strength in a thickness direction of 0.2 MPa or more in order to efficiently fill an active material into the sheet-shaped three-dimensional network aluminum porous body.Type: GrantFiled: May 30, 2012Date of Patent: June 18, 2013Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Toyama Co., Ltd.Inventors: Akihisa Hosoe, Kazuki Okuno, Hajime Ota, Koutarou Kimura, Kengo Goto, Hideaki Sakaida, Junichi Nishimura
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Patent number: 8465874Abstract: In a lithium-ion secondary battery of the present invention, the electrical resistivity of the mixture of a positive electrode active material, an electrically conductive member, and a binder is 0.1 ?cm or more but 1 ?cm or less. The positive and negative electrodes each have an electrical capacity of 10 mAh or more but 50 mAh or less per volume of a rectangular parallelepiped that has a 1 cm2 square base on a face of the electrode of one polarity facing the electrode of the other polarity and that has a height equal to the thickness of the electrode of the one polarity at the square base. Used as the negative electrode thereof is a negative electrode formed by sintering graphite powder, non-graphitizing carbon, and fibrous powder retained in the pores of a porous metal structure in an inert gas atmosphere at a temperature of between 600 and 1000° C.Type: GrantFiled: April 6, 2006Date of Patent: June 18, 2013Assignee: Sharp Kabushiki KaishaInventors: Naoto Nishimura, Motoaki Nishijima, Shinsuke Kobayashi
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Patent number: 8460827Abstract: A rechargeable battery including a cathode and an anode each capable of inserting and extracting an electrode reaction material, and including an electrolyte, in which the anode includes an anode current collector which is formed by including a current collector body. The anode current collector is provided thereon with an active anode material layer, and a plurality of conductive particles disposed on the surface of the current collector body with the surface facing the active anode material layer. The plurality of conductive particles is formed to include spherical particles and plate-like particles. Since a tridimensional structure having irregularities is formed on the surface of the current collector body with the spherical particles and plate-like particles, anchoring effects are greatly increased. As a result, the adhesion of the active anode material layer to the anode current collector is considerably improved.Type: GrantFiled: February 25, 2010Date of Patent: June 11, 2013Assignee: Sony CorporationInventors: Masayuki Iwama, Kenichi Kawase, Takakazu Hirose
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Patent number: 8399134Abstract: A lead acid battery includes a housing and at least one cell disposed within the housing. Each cell includes at least one positive plate and at least one negative plate and an electrolyte disposed in a volume between the positive and negative plates. The at least one negative plate includes a current collector, consisting essentially of a layer of carbon foam disposed on a substrate, and a chemically active material disposed on the current collector.Type: GrantFiled: November 20, 2007Date of Patent: March 19, 2013Assignee: Firefly Energy, Inc.Inventors: Kurtis C. Kelley, Matthew J. Maroon
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Patent number: 8399131Abstract: Disclosed is a composite negative electrode active material including a graphitizable carbon material containing a layered structure formed of stacked carbon layers partially having a three-dimensional regularity, and a low crystalline carbon material. A negative electrode including the composite negative electrode active material is used to produce a non-aqueous electrolyte secondary battery. The non-aqueous electrolyte secondary battery thus produced has a high energy density and demonstrates a high output/input performance for a long period of time in various environments of high to low temperatures.Type: GrantFiled: June 2, 2008Date of Patent: March 19, 2013Assignee: Panasonic CorporationInventors: Yoshiyuki Ozaki, Hiroyuki Fujimoto
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Publication number: 20130045425Abstract: It is an object of the present invention to provide a three-dimensional network aluminum porous body which can be used for a process continuously producing an electrode and enables to produce a current collector having small electric resistance in the current collecting direction, and an electrode using the aluminum porous body, and a production method thereof. In a sheet-shaped three-dimensional network aluminum porous body for a current collector, when one of two directions orthogonal to each other is taken as an X-direction and the other is taken as a Y-direction, a cell diameter in the X-direction of the three-dimensional network aluminum porous body differs from a cell diameter in the Y-direction thereof.Type: ApplicationFiled: August 8, 2012Publication date: February 21, 2013Applicants: SUMITOMO ELECTRIC TOYAMA CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Akihisa HOSOE, Kazuki OKUNO, Hajime OTA, Koutarou KIMURA, Kengo GOTO, Hideaki SAKAIDA, Junichi NISHIMURA
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Electrode for lithium secondary battery, lithium secondary battery and method for producing the same
Patent number: 8318359Abstract: An electrode for a lithium secondary battery including a sheet-like current collector and an active material layer carried on the current collector. The active material layer is capable of absorbing and desorbing lithium, and the active material layer includes a plurality of columnar particles having at least one bend. An angle ?1 formed by a growth direction of the columnar particles from a bottom to a first bend of the columnar particles, and a direction normal to the current collector is preferably 10° or more and less than 90°. When ?n+1 is an angle formed by a growth direction of the columnar particles from an n-th bend counted from a bottom of the columnar particles to an (n+1)-th bend, and the direction normal to the current collector, and n is an integer of 1 or more, ?n+1 is preferably 0° or more and less than 90°.Type: GrantFiled: November 7, 2006Date of Patent: November 27, 2012Assignee: Panasonic CorporationInventors: Keiichi Takahashi, Masaya Ugaji, Yasutaka Kogetsu, Shinji Mino, Nobuaki Nagao, Masaki Hasegawa -
Patent number: 8268148Abstract: A reference electrode having a casing with an inner cavity successively filled with a paste constituting an active material and a porous material impregnated with an electrolyte solution. The projecting end of a silver wire is embedded in the paste at the bottom of the inner cavity. The paste is constituted of a powder of a silver compound and of the alkaline electrolyte solution. The silver compound is any insoluble silver salt or oxide containing the negative ion of the electrolyte solution. The impregnated porous material is preferably constituted by a plurality of mat separator pieces mechanically and compressed by a closing plug, closing the inner cavity and forming a porous liquid junction.Type: GrantFiled: June 25, 2007Date of Patent: September 18, 2012Assignee: Commissariat a l'energie AtomiqueInventor: Angel Zhivkov Kirchev
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Patent number: 8263265Abstract: An Si/C composite includes carbon (C) dispersed in porous silicon (Si) particles. The Si/C composite may be used to form an anode active material to provide a lithium battery having a high capacity and excellent capacity retention.Type: GrantFiled: May 12, 2008Date of Patent: September 11, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Sang-kook Mah, Han-su Kim
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Patent number: 8211573Abstract: The present invention provides a conductive sheet having a surface resistance of 10 ?/sq or lower on both surfaces, the conductive sheet comprising a sheet (A) and a sheet (B) laminated to the sheet (A), the sheet (A) having an apparent specific gravity of 0.05 g/cm3 to 0.50 g/cm3 and being formed from fibers having a diameter within the range between 3 and 20 ?m, and the sheet (B) being formed from fibers having a diameter of 3 ?m or smaller. The sheet (A) may be a fibrous material comprises an organic polymer fiber as its main component.Type: GrantFiled: September 6, 2011Date of Patent: July 3, 2012Assignee: Kuraray Co., Ltd.Inventors: Masakazu Nishiyama, Eiichi Ishida, Yoshiaki Yasuda
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Publication number: 20120141882Abstract: A current collector for a nonaqueous electrolyte battery, in which oxygen content in the surface of an aluminum porous body is low. The current collector is made of an aluminum porous body. The content of oxygen in an aluminum porous body surface is 3.1% by mass or less. The aluminum porous body includes an aluminum alloy containing at least one Cr, Mn and transition metal elements. The aluminum porous body can be prepared by a method in which, after an aluminum alloy layer is formed on the surface of a resin of a resin body having continuous pores, the resin body is heated to a temperature of the melting point of the aluminum alloy or less to thermally decompose the resin body while applying a potential lower than the standard electrode potential of aluminum to the aluminum alloy layer with the resin body dipped in a molten salt.Type: ApplicationFiled: October 4, 2011Publication date: June 7, 2012Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Nobuhiro OTA, Akihisa Hosoe, Masatoshi Majima, Koji Nitta
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Patent number: 8173302Abstract: An electrode material having carbon and sulfur is provided. The carbon is in the form of a porous matrix having nanoporosity and the sulfur is sorbed into the nanoporosity of the carbon matrix. The carbon matrix can have a volume of nanoporosity between 10 and 99%. In addition, the sulfur can occupy between 5 to 99% of the nanoporosity. A portion of the carbon structure that is only partially filled with the sulfur remains vacant allowing electrolyte egress. In some instances, the nanoporosity has nanopores and nanochannels with an average diameter between 1 nanometer and 999 nanometers. The sulfur is sorbed into the nanoporosity using liquid transport or other mechanisms providing a material having intimate contact between the electronically conductive carbon structure and the electroactive sulfur.Type: GrantFiled: June 11, 2008Date of Patent: May 8, 2012Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., University of WaterlooInventors: Kimber L. Stamm, Monique N. Richard, Linda F. Nazar, Xiulei Ji, Kyu-Tae Lee
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Fuel cell structures and assemblies with channeled current collectors, and method of making the same
Patent number: 8168350Abstract: A channeled metal clad fiber comprises one or more surface channels that extend along directions substantially parallel to the longitudinal axis of such fiber. Metal clad fibers may include multiple protective layers, and one or more protective layers may contain multiple conductors therein. A microfibrous fuel cell structure includes a hollow microfibrous membrane separator having an electrolyte medium therein and defining a bore side and a shell side. An inner current collector formed of a channeled metal clad or unclad metal fiber, and an inner electrocatalyst layer are positioned at the bore side of such fuel cell, and an outer current collector and an outer electrocatalyst layer are positioned at the shell side thereof. Surface channels on the inner current collector provide inner fluid passages for passing a fuel-containing or an oxidant-containing fluid through the microfibrous fuel cell.Type: GrantFiled: January 6, 2009Date of Patent: May 1, 2012Assignee: Microcell CorporationInventor: Ray R. Eshraghi -
Patent number: 8076027Abstract: A negative electrode for a secondary battery includes a separator; a negative electrode active material layer which is fixed to the separator and can store and emit lithium ions; and a current collector layer formed on the side of the separator opposite to the negative electrode active material layer. The negative electrode active material layer contains at least one selected from the group consisting of silicon, silicon alloys, compounds containing silicon and oxygen, compounds containing silicon and nitrogen, compounds containing silicon and fluorine, tin, tin alloys, compounds containing tin and oxygen, compounds containing tin and nitrogen, and compounds containing tin and fluorine.Type: GrantFiled: January 23, 2006Date of Patent: December 13, 2011Assignee: Panasonic CorporationInventors: Kazuyoshi Honda, Yuuko Ogawa, Yasutaka Kogetsu
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Publication number: 20110294008Abstract: A lightweight, durable lead-acid battery is disclosed. Alternative electrode materials and configurations are used to reduce weight, to increase material utilization and to extend service life. The electrode can include a current collector having a buffer layer in contact with the current collector and an electrochemically active material in contact with the buffer layer. In one form, the buffer layer includes a carbide, and the current collector includes carbon fibers having the buffer layer. The buffer layer can include a carbide and/or a noble metal selected from of gold, silver, tantalum, platinum, palladium and rhodium. When the electrode is to be used in a lead-acid battery, the electrochemically active material is selected from metallic lead (for a negative electrode) or lead peroxide (for a positive electrode).Type: ApplicationFiled: July 19, 2011Publication date: December 1, 2011Inventors: Edgar Lara-Curzio, Ke An, James O. Kiggans, JR., Nancy J. Dudney, Cristian I. Contescu, Frederick S. Baker, Beth L. Armstrong
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Patent number: 8029932Abstract: An anode capable of improving cycle characteristics and a battery using it are provided. An anode active material layer containing Si is provided on an anode current collector. The anode current collector is roughened by providing a projection on a base material with a ten point height of roughness profile Rz1 of 2.0 ?m or less. A value of a difference, Rz2?Rz1 obtained by subtracting the ten point height of roughness profile Rz1 of the base material from a ten point height of roughness profile Rz2 of the anode current collector is from 0.2 ?m to 5.1 ?m. Thereby, even when the anode active material is expanded and shrunk due to charge and discharge, breakage of the anode current collector, fall off of the anode active material layer and the like can be prevented.Type: GrantFiled: November 16, 2005Date of Patent: October 4, 2011Assignee: Sony CorporationInventors: Isamu Konishiike, Kenichi Kawase
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Publication number: 20110236760Abstract: An electrode for a non-aqueous electrolyte secondary battery with which the non-aqueous electrolyte secondary battery can perform high output charge and discharge is provided. The electrode for a non-aqueous electrolyte secondary battery includes a current collector and an electrode active material layer containing active materials. The electrode active material layer has a structure in which the active material exists continuously with the active material particles binding to each other, and has a porous structure in which pores through which an electrolyte can pass are formed.Type: ApplicationFiled: March 24, 2010Publication date: September 29, 2011Applicant: DAI NIPPON PRINTING CO., LTD.Inventor: Hiroyuki Kobori
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Publication number: 20110206992Abstract: The present invention relates to porous structures for energy storage devices. In some embodiments, the porous structure can comprise sulfur and be used in electrochemical cells. Such materials may be useful, for example, in forming one or more electrodes in an electrochemical cell. For example, the systems and methods described herein may comprise the use of an electrode comprising a conductive porous support structure and a plurality of particles comprising sulfur (e.g., as an active species) substantially contained within the pores of the support structure. The inventors have unexpectedly discovered that, in some embodiments, the sizes of the pores within the porous support structure and/or the sizes of the particles within the pores can be tailored such that the contact between the electrolyte and the sulfur is enhanced, while the electrical conductivity and structural integrity of the electrode are maintained at sufficiently high levels to allow for effective operation of the cell.Type: ApplicationFiled: February 23, 2011Publication date: August 25, 2011Applicant: Sion Power CorporationInventors: Christopher T.S. Campbell, John D. Affinito, Tracy Earl Kelley
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Patent number: 8003259Abstract: A non-aqueous electrolyte secondary battery including: a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; a non-aqueous electrolyte; and a porous insulating film adhered to a surface of at least one selected from the group consisting of the positive electrode and the negative electrode, the porous insulating film including an inorganic oxide filler and a film binder, wherein the ratio R of actual volume to apparent volume of the separator is not less than 0.4 and not greater than 0.7, and wherein the ratio R and a porosity P of the porous insulating film satisfy the relational formula: ?0.10?R?P?0.30.Type: GrantFiled: April 29, 2008Date of Patent: August 23, 2011Assignee: Panasonic CorporationInventors: Kaoru Inoue, Kiyomi Kato, Kohei Suzuki, Shigeo Ikuta, Yusuke Fukumoto, Tetsuya Hayashi
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Publication number: 20110177378Abstract: An electrode assemblage includes a first electrode assembly with first electrodes. Each first electrode has a porous first electrode current collector with a plurality of pores, and first electrode active material layers attached to the porous first electrode current collector. The electrode assemblage further includes a second electrode having a second electrode current collector and second electrode active material layers attached to the second electrode current collector, and also includes a separator disposed between the first electrode assembly and the second electrode.Type: ApplicationFiled: November 16, 2010Publication date: July 21, 2011Inventors: Man-Seok Han, Sung-Soo Kim, Nam-Soon Choi, Sae-Weon Roh, Jin-Kyu Hong
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Patent number: 7972731Abstract: A method of the present invention is used for the high-rate deposition of materials, such as carbon, silicon, metals, metal oxides, and the like, onto a metal substrate defined by a metal current collector. The particles of the material are mixed with fluid and are injected against the metal tape at high pressure and high velocity. The particles of the material form an active layer of the metal current collector. The metal current collector is used as a cathode or anode combined with a separator to form a cell of a secondary battery, metal-ceramic membranes, film composite metal-ceramic materials for electronic devices.Type: GrantFiled: November 17, 2006Date of Patent: July 5, 2011Assignees: Enerl, Inc., Nanoener Technologies, Inc.Inventors: Yevgen Kalynushkin, Peter Novak
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Publication number: 20110143202Abstract: A monolithic three-dimensional electrochemical energy storage system is provided on an aerogel or nanotube scaffold. An anode, separator, cathode, and cathodic current collector are deposited on the aerogel or nanotube scaffold.Type: ApplicationFiled: December 14, 2010Publication date: June 16, 2011Applicant: Lawrence Livermore National Security, LLCInventors: Joseph C. Farmer, Michael Stadermann
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Patent number: 7919014Abstract: The present invention relates to the production of electrochemical capacitors with a DEL. The proposed electrodes with DEL are based on non-metal conducting materials, including porous carbon materials, and are capable of providing for high specific energy, capacity and power parameters of electrochemical capacitors. P-type conductivity and high concentration of holes in electrode materials may be provided by thermal, ionic or electrochemical doping by acceptor impurities; irradiating by high-energy fast particles or quantums; or chemical, electrochemical and/or thermal treatment. The present invention allows for an increase in specific energy, capacity and power parameters, as well as a reduction in the cost of various electrochemical capacitors with DEL. The proposed electrodes with DEL can be used as positive and/or negative electrodes of symmetric and asymmetric electrochemical capacitors with aqueous and non-aqueous electrolytes.Type: GrantFiled: November 27, 2007Date of Patent: April 5, 2011Assignee: Universal Supercapacitors LLCInventors: Samvel Avakovich Kazaryan, Gamir Galievich Kharisov, Sergey Nikolaevich Razumov, Sergey Vitalievich Litvinenko, Vyacheslav I. Shumovsky
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Patent number: 7901811Abstract: The invention relates to a rechargeable electrochemical battery cell. Said cell comprises a negative electrode (5), an electrolyte (19), and a positive electrode, the negative electrode (5) having a an electronically conductive substrate (14), onto which an active mass (15) is electrolytically deposited during the charging of the cell. The aim of the invention is to significantly improve the operational safety of said cell. To achieve this, the cell in contact with the substrate (14)of the negative electrode (5) has a porous structure (16)formed by solid particles (17), which is configured and positioned in such a way that the active mass (15), which is deposited during the charging of the cell, penetrates from the surface of the substrate (14) into the pores (18) of the latter and is deposited again therein.Type: GrantFiled: January 16, 2003Date of Patent: March 8, 2011Inventors: Guenther Hambitzer, Claudia Wollfarth, Ingo Stassen, Klaus Schorb, Christiane Ripp
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Patent number: 7879497Abstract: A battery is adapted such that a nickel hydroxide particle group constituted of a number of nickel hydroxide particles filled in a void part of a positive electrode substrate contains, at a ratio of 15 wt % or less, small-diameter nickel hydroxide particles each having a particle diameter of 5 ?m or less. The positive electrode substrate is configured such that a front-surface-side nickel layer and a back-surface-side nickel layer are made larger in thickness than a middle nickel layer, and an average thickness B of either the front-surface-side nickel layer or the back-surface-side nickel layer, which is thicker one, and an average thickness C of the middle nickel layer satisfy a relation of C/B?0.6.Type: GrantFiled: February 9, 2007Date of Patent: February 1, 2011Assignee: Panasonic EV Energy Co., Ltd.Inventors: Hiroyuki Sakamoto, Kazuhiro Ohkawa
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Patent number: 7838154Abstract: A negative electrode 10 for a nonaqueous secondary battery, has an active material layer 2 containing active material particles 2a. The active material layer 2 has a metallic material 4 deposited among the particles by electroplating. The negative electrode 10 has a large number of holes 5 open on at least one side thereof and extending through the thickness of the active material layer. The negative electrode 10 further has a pair of current collecting layers 3a and 3b adapted to be brought into contact with an electrolyte. The active material layer 2 is between the current collecting layers 3a and 3b. The holes 5 open on the negative electrode 10 preferably have an opening area ratio of 0.3% to 30%. At least one of the pair of the current collecting layers 3a and 3b preferably has a thickness of 0.3 to 10 ?m.Type: GrantFiled: July 6, 2005Date of Patent: November 23, 2010Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Tomoyoshi Matsushima, Hitohiko Honda, Yoshiki Sakaguchi, Masahiro Hyakutake, Kiyotaka Yasuda
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Patent number: 7678501Abstract: In the present invention, the electrode assembly is first formed, and then a tab portion is formed by compressing an active material unfilled portion in an electrode having a foamed-metal electrode substrate (Tab Portion Formation Step). Accordingly, in the manufacturing method of the present invention, even if winding misalignment is created in which the edge of the separator is located adjacent to one edge of the active material unfilled portion during the formation of the electrode assembly, the misaligned portion of the separator is pushed in the width direction of the electrode together with the active material unfilled portion when the compression is applied in the Tab Portion Formation Step. Herewith, it is less likely to tuck a part of the separator between the tab portion and the current collector when the current collector is joined in the Current Collector Joining Step.Type: GrantFiled: March 30, 2006Date of Patent: March 16, 2010Assignee: Sanyo Electric Co., Ltd.Inventors: Kei Tomihara, Kazuki Hamasaki, Yoichiri Shibata, Takuya Okamoto, Kenji Yamato, Etsuya Fujisaka, Hiroshi Fukuda
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Patent number: 7595135Abstract: An alkaline storage battery comprising: a positive electrode plate; a negative electrode plate; separators interposed between the positive electrode plate and the negative electrode plate; and an alkaline electrolyte, wherein a first edge of the positive electrode plate and a first edge of the negative electrode plate serve as current collecting portions, at least a second edge of at least the positive electrode plate is covered with polyethylene resin on an end face and peripheral sides thereof, the second edge being positioned opposite to the first edge, and the polyethylene resin film formed at the second edge of the positive electrode plate adheres to the separators positioned on both sides of the positive electrode plate.Type: GrantFiled: March 9, 2004Date of Patent: September 29, 2009Assignee: Panasonic CorporationInventors: Yoshiyuki Muraoka, Haruya Nakai, Masaharu Miyahisa
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Publication number: 20090233175Abstract: A current collector plate (20) for an energy storage device includes a first current collector (11) and a bonding layer (22) connected to the first current collector. At least one current carrier (31) is disposed at least partially between the first current collector and the bonding layer.Type: ApplicationFiled: March 29, 2006Publication date: September 17, 2009Inventors: Kurtis C. Kelley, Charles F. Ostermeier
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Patent number: 7494743Abstract: An anode capable of relaxing internal stress and thereby preventing deformation and a battery using it are provided. An anode provided with an anode active material layer is formed on an anode current collector. The anode active material layer has active material particles containing silicon (Si) as an element, and at least some of the active material particles contain a polymer component in the particle.Type: GrantFiled: September 21, 2006Date of Patent: February 24, 2009Assignee: Sony CorporationInventors: Takakazu Hirose, Masayuki Iwama, Isamu Konishiike, Kenichi Kawase
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Fuel cell structures and assemblies with channeled current collectors, and method of making the same
Patent number: 7473490Abstract: The present invention relates to a channeled metal clad fiber comprising one or more surface channels that extend along directions that are substantially parallel to the longitudinal axis of such fiber. The present invention also provides a microfibrous fuel cell structure that comprises a hollow microfibrous membrane separator having an electrolyte medium therein and defining a bore side and a shell side. An inner current collector, which is formed of a channeled metal clad fiber or a channeled metal fiber that is unclad, and an inner electrocatalyst layer are positioned at the bore side of such microfibrous fuel cell, and an outer current collector and an outer electrocatalyst layer are positioned at the shell side of such microfibrous fuel cell. The surface channels on such inner current collector provide inner fluid passages for passing a fuel-containing or an oxidant-containing fluid through the microfibrous fuel cell.Type: GrantFiled: May 27, 2004Date of Patent: January 6, 2009Assignee: Microcell CorporationInventor: Ray R. Eshraghi -
Patent number: 7427455Abstract: There are provided an anode for a lithium metal polymer secondary battery comprising an anodic current collector having a surface on which a plurality of recesses having a predetermined shape are formed and a method of preparing the same. The plurality of recesses are formed on a surface of the anodic current collector using a physical method or a chemical method. In a lithium metal polymer secondary battery employing the anode, oxidation/reduction of lithium and the formation of dendrite occur only in the recesses formed by surface patterning of the anodic current collector. Thus, expanding and shrinking of a battery due to a change in the thickness of the lithium anode can be prevented and cycling stability and the lifespan of a battery can be improved.Type: GrantFiled: September 19, 2005Date of Patent: September 23, 2008Assignee: Electronics and Telecommunications Research InstituteInventors: Young Gi Lee, Yong Sik Hong, Yong Joon Park, Kwang Sun Ryu
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Patent number: 7405020Abstract: An apparatus (1) for use of carbonized charcoal powder as an electrode is provided. Charcoal is provided as a powder, carbonized, and placed in a container (16) by which compressive pressure is applied to the carbonized-charcoal powder via one or more sides of the container (16). As a result of the compressive pressure the packed-bed (11) of carbonized-charcoal powder manifests a resistivity of less than about 1 ohm-cm and is suitable for use as an electrode in a fuel cell, battery or electrolyzer. The apparatus is adapted with electrical contacts (8, 9, 10) to conduct electric flow to or from the electrode and adapted for communication of an electrolyte with the electrode.Type: GrantFiled: April 7, 2004Date of Patent: July 29, 2008Assignee: University of HawaiiInventor: Michael J. Antal, Jr.
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Patent number: 7316862Abstract: A lithium-containing complex oxide represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.15, ?0.05?x+??0.2, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Mg, Ti, Cr, Fe, Co, Cu, Zn, Al, Ge, Zr and Sn) is provided. The lithium-containing complex oxide contains secondary particles formed of flocculated primary particles. The primary particles have a mean particle diameter of 0.3 to 3 ?m, and the secondary particles have a mean particle diameter of 5 to 20 ?m. By using this lithium-containing complex oxide as a positive active material, a non-aqueous secondary battery having a high capacity, excellent cycle durability and excellent storage characteristics at a high temperature is achieved.Type: GrantFiled: November 20, 2003Date of Patent: January 8, 2008Assignee: Hitachi Maxell, Ltd.Inventors: Kazutaka Uchitomi, Atsushi Ueda, Shigeo Aoyama
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Patent number: 7297446Abstract: A negative electrode for a rechargeable lithium battery which is obtained by sintering under a non-oxidizing atmosphere, in the form of a layer on a surface of a metal foil current collector, an anode mix containing a binder and particles of active material containing silicon and/or a silicon alloy; the negative electrode being characterized in that the metal foil current corrector has projections and recesses on its surface, the projection is shaped to have a recurved side face portion that curves more outwardly as it extends closer to a distal end of the projection, and the binder penetrates into spaces defined by the recurved side face portions.Type: GrantFiled: March 26, 2004Date of Patent: November 20, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Atsushi Fukui, Mariko Torimae, Yasuyuki Kusumoto, Hisaki Tarui
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Publication number: 20070224512Abstract: A battery is adapted such that a nickel hydroxide particle group constituted of a number of nickel hydroxide particles filled in a void part of a positive electrode substrate contains, at a ratio of 15 wt % or less, small-diameter nickel hydroxide particles each having a particle diameter of 5 ?m or less. The positive electrode substrate is configured such that a front-surface-side nickel layer and a back-surface-side nickel layer are made larger in thickness than a middle nickel layer, and an average thickness B of either the front-surface-side nickel layer or the back-surface-side nickel layer, which is thicker one, and an average thickness C of the middle nickel layer satisfy a relation of C/B?0.6.Type: ApplicationFiled: February 9, 2007Publication date: September 27, 2007Applicant: PANASONIC EV ENERGY CO., LTD.Inventors: Hiroyuki Sakamoto, Kazuhiro Ohkawa
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Patent number: 7252907Abstract: A nonaqueous electrolyte secondary battery including positive and negative electrodes capable of occluding and releasing lithium and a nonaqueous electrolyte and in which the negative electrode includes a foamed metal containing silicon as an active material therein.Type: GrantFiled: February 26, 2004Date of Patent: August 7, 2007Assignee: SANYO Electric Co., Ltd.Inventors: Masanobu Takeuchi, Seiji Yoshimura
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Patent number: 7227235Abstract: A method and apparatus are disclosed wherein a battery comprises an electrode having at least one nanostructured surface. The nanostructured surface is disposed in a way such that an electrolyte fluid of the battery is prevented from contacting the electrode, thus preventing discharge of the battery when the battery is not in use. When a voltage is passed over the nanostructured surface, the electrolyte fluid is caused to penetrate the nanostructured surface and to contact the electrode, thus activating the battery. In one illustrative embodiment, the battery is an integrated part of an electronics package. In another embodiment, the battery is manufactured as a separate device and is then brought into contact with the electronics package. In yet another embodiment, the electronics package and an attached battery are disposed in a projectile that is used as a military targeting device.Type: GrantFiled: November 18, 2003Date of Patent: June 5, 2007Assignee: Lucent Technologies Inc.Inventors: Timofei Nikita Kroupenkine, Joseph Ashley Taylor, Donald Weiss
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Patent number: 7189478Abstract: The invention aims to provide a lithium secondary battery exhibiting the improved function of self safety in an abnormal state without sacrificing battery characteristics. To attain the object, in a lithium secondary battery comprising a positive electrode (3a, 3b), a negative electrode (2a, 2b), an electrolytic solution, and a separator, a plurality of positive electrodes (3a, 3b) and negative electrodes (2a, 2b) are arranged to construct an electrode structure which includes an outermost layer of electrode on which a back coat layer (11) is formed.Type: GrantFiled: June 27, 2003Date of Patent: March 13, 2007Assignee: TDK CorporationInventors: Tsuyoshi Iijima, Atsushi Sano, Satoshi Maruyama
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Patent number: 7153609Abstract: A rechargeable battery with a nonaqueous electrolyte using a constituent material, which has high energy density and a high level of safety. The constituent material includes a positive electrode having a lithium compound-containing active material and a current collector, and a negative electrode facing the positive electrode. The negative electrode an active material and a current collector. At least one of the current collectors being formed of an assembly of rectangular sheet pieces. The constituent material satisfies formula S/???×d, where d represents distance between the current collectors which face each other; S represents the largest facing area in one rectangular sheet piece in the positive electrode current collector and the negative electrode current collector; ? represents aspect ratio of one rectangular sheet piece in the positive electrode or negative electrode current collector; and ? is a coeffieient which is a number of 900 to 720.Type: GrantFiled: September 5, 2002Date of Patent: December 26, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Kohichi Kubo, Hideyuki Kanai, Shuji Yamada
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Patent number: 7153611Abstract: A lithium secondary battery comprising an electrode in which an active material layer which includes an active material that electrochemically occludes and releases lithium is formed on a current collector, wherein cracks are formed in the active material layer by occlusion and release of lithium ions and thereafter a solid electrolyte is formed in the cracks in the active material layer.Type: GrantFiled: September 30, 2003Date of Patent: December 26, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Hiroshi Minami, Katsunobu Sayama, Hiromasa Yagi, Atsushi Fukui, Mariko Torimae, Yasuyuki Kusumoto, Hisaki Tarui
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Patent number: 7033702Abstract: A matted particulate electrode located between the current collector and a porous separator of a rechargeable lithium battery is described, which contains electro-active particles intermixed with pliable, solid, lithium ion conducting, polymer electrolyte filaments having adhesive surfaces. The electro-active particles and the optionally added electro-conductive carbon particles adhere to the tacky surface of the adhesively interlinking polymer electrolyte filaments. The matted particulate electrode is impregnated with an organic solution containing another lithium compound. In a second embodiment the porous separator is coated on at least one of its faces, with polymer electrolyte having an adhesive surface and made of the same polymer as the electrolyte filaments. The polymer electrolyte filaments in the matted layer may adhere to the coated surface of the separator.Type: GrantFiled: September 3, 2004Date of Patent: April 25, 2006Assignee: Electrovaya Inc.Inventors: Sankar Dasgupta, James K. Jacobs, Rakesh Bhola
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Patent number: 6972044Abstract: A workpiece, in which a lead is laid on top of a three-dimensional porous metal body, is placed between an ultrasonic horn and an anvil with a lead portion facing the ultrasonic horn. A support is raised so that the lead portion of the workpiece is pressed between the ultrasonic horn and the anvil. While being rotated around a central shaft with a motor, the ultrasonic horn vibrates at a frequency of 20 kHz in the shaft direction. Thus, the workpiece is advanced continuously, so that the lead is bonded ultrasonically to the three-dimensional porous metal body (i.e., metal-to-metal bonding is established). It is possible to provide a battery electrode that can be produced continuously at a lower running cost, reduce the faulty welding with a current collecting plate, and prevent short-circuits.Type: GrantFiled: September 22, 2004Date of Patent: December 6, 2005Assignees: Matsushita Electric Industrial Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Hiroshi Inoue, Kiwamu Inui, Mitsugu Takaki, Shinichi Hojioka