Alkalated Carbon, Graphite, Or Carbonaceous Component Is Active Material Patents (Class 429/231.4)
  • Patent number: 8426052
    Abstract: An electrochemical cell in one embodiment includes a first electrode, and a second electrode spaced apart from the first electrode, the second electrode including, a current collector, an electrically conducting rigid support frame electrically connected to the current collector, and an active material coated to the rigid support frame.
    Type: Grant
    Filed: May 8, 2009
    Date of Patent: April 23, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Boris Kozinsky, John F. Christensen, Nalin Chaturvedi, Jasim Ahmed
  • Patent number: 8404381
    Abstract: A material or compound is provided having a spinel structure and corresponding to the formula LiyNi0.5Mn1.5?xIVMnxIIIAzO4?d, where: 0.02?x?0.35; d>0; A is selected from the group comprising Na, K, Mg, Nb, Al, Ni, Co, Zr, Cr, Fe, Cu, Ti, Zn, Si and Mo; 0.8?y?1.2; 0?z?0.1; and has a mesh parameter of between 8.174 and 8.179 ?.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: March 26, 2013
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Severine Jouanneau, Frederic Le Cras, Carole Bourbon, Helene Lignier
  • Publication number: 20130052544
    Abstract: An object of the present invention is to provide a cathode active material which contains small-particle sized and low-crystalline lithium transition metal silicate and which undergoes charge-discharge reaction at room temperature. The cathode active material for a non-aqueous electrolyte secondary battery is characterized by containing a lithium transition metal silicate and exhibits diffraction peaks having half widths of 0.175 to 0.6°, the peaks observed through powder X-ray diffractometry within a 2? range of 5 to 50°.
    Type: Application
    Filed: August 30, 2012
    Publication date: February 28, 2013
    Applicants: THE FURUKAWA BATTERY CO., LTD, FURUKAWA ELECTRIC CO., LTD.
    Inventors: Michio OHKUBO, Michihiro SHIMADA, Naoki UNO, Yosuke HIRAYAMA, Toshio TANI, Hidetoshi ABE, Miyu AITA
  • Patent number: 8367252
    Abstract: A non-aqueous electrolyte secondary battery wherein the non-aqueous electrolyte contains a non-aqueous solvent, a solute dissolved in the non-aqueous solvent, and hydrogenated terphenyl, the solute includes a boron-containing alkali salt and a boron-free alkali salt, the negative electrode includes a negative electrode active material comprising a randomly oriented carbon composite (A), and the carbon composite (A) contains a graphitic carbon substance (B) and a carbon substance (C) that is different from the graphitic carbon substance (B).
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: February 5, 2013
    Assignees: Panasonic Corporation, Mitsubishi Chemical Corporation
    Inventors: Takaharu Morikawa, Atsushi Ueda, Takafumi Oura, Shinichi Kinoshita, Minoru Kotato, Hideharu Satou, Hitoshi Matsumoto
  • Patent number: 8334072
    Abstract: A negative active material for a rechargeable lithium battery that includes a core including a compound represented by the following Chemical Formula 1, and a carbon layer disposed on the core and including low crystalline carbon. LixTiyOz ??[Chemical Formula 1] where 0.1?x?4, 1?y?5, and 2?z?12.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: December 18, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jun-Sik Kim, Tae-Keun Kim, Kyeu-Yoon Sheem, Eui-Hwan Song, Jeong-Soon Shin, Sung-Soo Kim
  • Patent number: 8329136
    Abstract: The present invention relates to a graphite particle and a carbon-graphite composite particle both suitable for use in electrode for lithium ion secondary battery, as well as to processes for producing these particles. The graphite particle of the present invention has an average particle diameter of 5 to 50 ?m, wherein one or more recesses having a depth of 0.1 to 10 ?m are formed in the surface. The graphite particle is produced by a mixing step for mixing raw material graphite particles and recess-forming particles, a press molding step for press-molding the mixture composed of the raw material graphite particles and the recess-forming particles to obtain a molded article, a pulverization step for pulverizing the molded article, and a separation step for separating and removing the recess-forming particles from the pulverized molded article.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: December 11, 2012
    Assignee: Nippon Coke & Engineering Company, Limited
    Inventors: Tatsuo Umeno, Takashi Iwao
  • Patent number: 8329340
    Abstract: A negative electrode for a non-aqueous electrolyte secondary battery is provided. The negative electrode includes: an electro-conductive base; a first layer provided on the electro-conductive base; and a second layer provided on the first layer. The first layer includes at least a graphitic material as a negative active material. The second layer includes at least a non-graphitizable carbonaceous material as a negative active material.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: December 11, 2012
    Assignee: Sony Corporation
    Inventors: Tamami Mori, Mahio Shibuya
  • Patent number: 8313860
    Abstract: High capacity primary and rechargeable cells may include a cathode with a lithiated active cathode material and an anode including lithium intercalating carbonaceous material. The cells may also include a separator impregnated with a liquid electrolyte or a solid electrolyte. The ratio of the capacity to reversibly incorporate lithium ions of the cathode to the capacity to reversibly incorporate lithium ions in the form of LiC6 of the carbonaceous material of the anode is equal to or larger than 2:1. During charging a high grade high density substantially non-dendritic lithium metal layer is plated on the anode.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: November 20, 2012
    Assignee: Tadiran Batteries Ltd.
    Inventors: Herzel Yamin, Chen Menachem, Dany Bar-Tov
  • Patent number: 8273267
    Abstract: It is an object of the present invention to provide a method for producing a positive electrode active material for a battery, which can realize easy regulation of pore size in porosity formation of a positive electrode active material and is less likely to undergo hindrance of ion conduction caused by residues and, thus, can realize excellent high-rate discharge characteristics, and a method for producing a composition for a battery using the positive electrode active material for the battery. The method for producing a positive electrode active material for a battery of the present invention is a method for producing a positive electrode active material for a battery, including: a step 1 of firing a mixture of a raw material for the positive electrode active material and carbon particles to remove the carbon particles; and a step 2 of milling and classifying a fired body obtained in the step 1.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: September 25, 2012
    Assignee: Kao Corporation
    Inventors: Ryuichi Akagi, Kenichi Nishimura, Yasuhisa Fukumoto
  • Patent number: 8257868
    Abstract: A molten salt composition is disclosed containing two or more types of molten salt MTFSI whose anion is an imide anion TFSI and whose cation is an alkali metal M exhibits a lower electrolyte melting point and a wider operating temperature range than a simple salt does. This brings about various advantages such as a wider range of materials that are chosen for use in batteries and the like.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: September 4, 2012
    Assignee: Kyoto University
    Inventors: Rika Hagiwara, Kazuhiko Matsumoto, Kenichiro Tamaki, Toshiyuki Nohira, Takuya Goto
  • Patent number: 8253386
    Abstract: Capacity degradation due to charge/discharge cycles is suppressed in either a non-aqueous electrolyte secondary cell provided with a positive electrode including, as a positive electrode active material, a lithium-transition metal complex oxide having a layered structure and containing at least Ni and Mn as transition metals, and a negative electrode containing a carbon material as a negative electrode active material and having a higher initial charge-discharge efficiency than that of the positive electrode, or an assembled battery having a plurality of cells each of which is the secondary cell. A control circuit incorporated in the secondary cell or the assembled battery, or in an apparatus using the secondary cell or the assembled battery, monitors the voltage of the secondary cell or each of the cells in the assembled battery so that the end-of-discharge voltage of each cell is 2.9 V or higher.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: August 28, 2012
    Assignee: SANYO Electric, Co., Ltd.
    Inventors: Akira Kinoshita, Shingo Tode, Yasufumi Takahashi, Hiroyuki Fujimoto, Ikuro Nakane, Shin Fujitani
  • Patent number: 8221915
    Abstract: Disclosed herein are lithium or lithium-ion batteries that employ an aluminum or aluminum alloy current collector protected by conductive coating in combination with electrolyte containing aluminum corrosion inhibitor and a fluorinated lithium imide or methide electrolyte which exhibit surprisingly long cycle life at high temperature.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: July 17, 2012
    Assignee: Leyden Energy, Inc.
    Inventors: Konstantin Tikhonov, Tobias Johnson, Jesse Chau, Ka Ki Yip, Marc Juzkow
  • Patent number: 8192868
    Abstract: A lithium ion battery before pre-doping includes: a negative electrode member before initial charge having a negative active material before initial charge; a positive electrode member; an electrolyte body; a battery case; and a lithium ion supply body formed by a lithium compound capable of emitting lithium ions when positive voltage is applied to it. The lithium ion supply body is arranged so that it is at least partially in contact with the inner exposed surface of the battery case. The negative electrode member before pre-doping is electrically insulated from the metal case member. The lithium ion supply body and the negative active material before initial charge are respectively in contact with the electrolyte body.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: June 5, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideyasu Kawai, Keiichi Kohama, Akira Tsujiko
  • Patent number: 8178241
    Abstract: Current collectors and methods are provided that relate to electrodes that are useful in lithium polymer electrochemical cells. The provided current collectors include a metallic substrate, a substantially uniform nano-scale carbon coating, and an active electrode material. The coating has a maximum thickness of less than about 200 nanometers.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: May 15, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Ranjith Divigalpitiya, Mary I. Buckett
  • Patent number: 8168326
    Abstract: An energy storage device includes a first electrode comprising a first material and a second electrode comprising a second material, at least a portion of the first and second materials forming an interpenetrating network when dispersed in an electrolyte, the electrolyte, the first material and the second material are selected so that the first and second materials exert a repelling force on each other when combined. An electrochemical device, includes a first electrode in electrical communication with a first current collector; a second electrode in electrical communication with a second current collector; and an ionically conductive medium in ionic contact with said first and second electrodes, wherein at least a portion of the first and second electrodes form an interpenetrating network and wherein at least one of the first and second electrodes comprises an electrode structure providing two or more pathways to its current collector.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: May 1, 2012
    Assignees: A123 Systems, Inc., Massachusetts Institute of Technology
    Inventors: Yet-Ming Chiang, William D. Moorehead, Antoni S. Gozdz, Richard K. Holman, Andrew L. Loxley, Gilbert N. Riley, Jr., Michael S. Viola
  • Patent number: 8163427
    Abstract: A non-aqueous electrolytic solution is advantageously used in preparation of a lithium secondary battery excellent in cycle characteristics. In the non-aqueous electrolytic solution for a lithium secondary battery, an electrolyte salt is dissolved in a non-aqueous solvent. The non-aqueous electrolytic solution further contains a vinylene carbonate compound in an amount of 0.01 to 10 wt. %, and an alkyne compound in an amount of 0.01 to 10 wt. %.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: April 24, 2012
    Assignee: Ube Industries, Ltd.
    Inventors: Koji Abe, Kazuhiro Miyoshi, Takaaki Kuwata
  • Publication number: 20120094181
    Abstract: The present invention relates to negative-electrode active material for a lithium secondary battery exhibiting excellent capacity property and cycle life property, a method of preparing the same, and a lithium secondary battery using the negative-electrode active material, wherein the negative-electrode active material for a lithium secondary battery comprises a nanotube having a tube shape defined by an outer wall with a thickness of nanoscale, the outer wall of the nanotube comprises at least one non-carbonaceous material selected from the group consisting of silicon, germanium and antimony, and an amorphous carbon layer with a thickness of 5 nm or less is formed on the outer wall of the nanotube.
    Type: Application
    Filed: June 17, 2010
    Publication date: April 19, 2012
    Applicants: UNIST ACADEMY-INDUSTRY RESEARCH CORPORATION, LG CHEM, LTD.
    Inventors: Ki-Tae Kim, Soon-Ho Ahn, Je-Young Kim, Jaephil Cho, Mi-Hee Park
  • Patent number: 8153303
    Abstract: A negative electrode material for lithium ion secondary batteries includes core-shell composite particles prepared by covering the surface of a graphite powder with an amorphous carbon powder via a carbide of binder pitch, the graphite powder having an average particle diameter of 5 to 30 ?m and an average lattice spacing d(002) of less than 0.3360 nm, and the amorphous carbon powder having an average particle diameter of 0.05 to 2 ?m and an average lattice spacing d(002) of 0.3360 nm or more. A method to produce the negative electrode material includes mixing a graphite powder with pitch having a softening point of 70 to 250° C., adding an amorphous carbon powder to the resulting product, kneading the mixture while applying a mechanical impact to soften the pitch and carbonizing the pitch by heat treatment of the mixture at 750 to 2250° C. in a non-oxidizing atmosphere.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: April 10, 2012
    Assignee: Tokai Carbon Co., Ltd.
    Inventor: Kenta Ishii
  • Patent number: 8129051
    Abstract: A graphite particle obtained by assembling or binding together a plurality of flat-shaped particles so that the planes of orientation are not parallel to one another, or a graphite particle in which aspect ratio is 5 or less or specific surface area is 8 m2/g or less or the size of crystallite in the direction of c-axis of the crystal is 500 ? or more and the size of crystallite in the direction of plane is 1,000 ? or less as measured by X ray broad angle diffraction, or a graphite particle in which pore volume of the pores having a size falling in a range of 102 to 106 ? is 0.4 to 2.0 cc/g per weight of graphite particle or pore volume of the pores having a size falling in a range of 1×102 to 2×104 ? is 0.08 to 0.4 cc/g per weight of graphite particle is suitable for production of negative electrode of lithium secondary battery, and a lithium secondary battery obtained therefrom is excellent in rapid charge-discharge characteristics, cycle characteristics, etc.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: March 6, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshito Ishii, Tatsuya Nishida, Atsushi Fujita, Kazuo Yamada
  • Patent number: 8119288
    Abstract: The present invention provides an exfoliated graphite-based hybrid material composition for use as an electrode, particularly as an anode of a lithium ion battery. The composition comprises: (a) micron- or nanometer-scaled particles or coating which are capable of absorbing and desorbing alkali or alkaline metal ions (particularly, lithium ions); and (b) exfoliated graphite flakes that are substantially interconnected to form a porous, conductive graphite network comprising pores, wherein at least one of the particles or coating resides in a pore of the network or attached to a flake of the network and the exfoliated graphite amount is in the range of 5% to 90% by weight and the amount of particles or coating is in the range of 95% to 10% by weight. Also provided is a lithium secondary battery comprising such a negative electrode (anode). The battery exhibits an exceptional specific capacity, excellent reversible capacity, and long cycle life.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: February 21, 2012
    Assignee: Nanotek Instruments, Inc.
    Inventors: Aruna Zhamu, Bor Z. Jang
  • Publication number: 20110281157
    Abstract: An electrode material is created by forming a thin conformal coating of metal oxide on a highly porous carbon meta-structure. The highly porous carbon meta-structure performs a role in the synthesis of the oxide coating and in providing a three-dimensional, electronically conductive substrate supporting the thin coating of metal oxide. The metal oxide includes one or more metal oxides. The electrode material, a process for producing said electrode material, an electrochemical capacitor and an electrochemical secondary (rechargeable) battery using said electrode material is disclosed.
    Type: Application
    Filed: July 25, 2011
    Publication date: November 17, 2011
    Inventor: Fraser W. SEYMOUR
  • Publication number: 20110269022
    Abstract: An object is to improve the characteristics of a power storage device such as a charging and discharging rate or a charge and discharge capacity. The grain size of particles of a positive electrode active material is nano-sized so that a surface area per unit mass of the active material is increased. Specifically, the grain size is set to greater than or equal to 10 nm and less than or equal to 100 nm, preferably greater than or equal to 20 nm and less than or equal to 60 nm. Alternatively, the surface area per unit mass is set to 10 m2/g or more, preferably 20 m2/g or more. Further, the crystallinity of the active material is increased by setting an XRD half width to greater than or equal to 0.12° and less than 0.17°, preferably greater than or equal to 0.13° and less than 0.16°.
    Type: Application
    Filed: April 25, 2011
    Publication date: November 3, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Takahiro KAWAKAMI, Masaki YAMAKAJI
  • Patent number: 8021787
    Abstract: The preservation performance of a nonaqueous electrolyte secondary cell charged to high potential is improved while the initial capacity and the cycle property of the cell are also improved. The nonaqueous electrolyte secondary cell includes: a positive electrode having lithium phosphate and a positive electrode active material containing lithium cobalt compound oxide and lithium manganese nickel compound oxide having a layer structure, the lithium cobalt compound oxide having at least zirconium and magnesium added in LiCoO2; a negative electrode having a negative electrode active material; and a nonaqueous electrolyte having a nonaqueous solvent and an electrolytic salt. The potential of the positive electrode is more than 4.3 V and 5.1 V or less based on lithium. The nonaqueous electrolyte contains vinylene carbonate as the nonaqueous solvent and, as the electrolytic salt, at least one of lithium bis(pentafluoroethane sulfonyl)imide and lithium bis(trifluoromethane sulfonyl)imide at 0.1 M or more and 0.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: September 20, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masato Iwanaga, Kentaro Takahashi, Yukihiro Oki, Yoshihiko Ikeda, Akira Kinoshita, Nobumichi Nishida
  • Publication number: 20110200883
    Abstract: Methods, systems and devices are implemented in connection with rechargeable batteries. One such device includes a cathode that has lithiated sulfur. The device also includes a porous structure having pores containing the lithium-sulfide particles introduced during a manufacturing stage thereof.
    Type: Application
    Filed: October 28, 2010
    Publication date: August 18, 2011
    Inventors: Yi Cui, Yuan Yang, Matthew McDowell, Ariel Jackson
  • Patent number: 7993780
    Abstract: This invention provides a process for producing a lithium secondary battery. The process comprises: (a) providing a positive electrode; (b) providing a negative electrode comprising a carbonaceous material capable of absorbing and desorbing lithium ions, wherein the carbonaceous material is obtained by chemically or electrochemically treating a laminar graphite material to form a graphite crystal structure having an interplanar spacing d002 of at least 0.400 nm as determined from a (002) reflection peak in powder X-ray diffraction; and (c) providing a non-aqueous electrolyte disposed between the negative electrode and the positive electrode to form the battery structure. This larger interplanar spacing (greater than 0.400 nm, preferably no less than 0.55 nm) implies a larger interstitial space between two graphene planes to accommodate a greater amount of lithium. The resulting battery exhibits an exceptionally high specific capacity, an excellent reversible capacity, and a long cycle life.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: August 9, 2011
    Assignee: Nanotek Instruments, Inc.
    Inventors: Bor Z. Jang, Aruna Zhamu
  • Patent number: 7981395
    Abstract: A negative electrode carbon material for a lithium ion secondary battery manufactured by calcinating a rice starch portion obtained by removing the pericarp and tests from unpolished rice and a method for manufacturing the same. The rice starch portion is preferably middle-grade white bran or high-grade white bran each obtained when unpolished rice is polished. The above negative electrode carbon material may have a relatively broad peak at a 2? of 40 to 50° and a sharp peak at a 2? of 42 to 44° in its powder X-ray (CuK?) diffraction. According to the present invention, a negative electrode carbon material for a lithium ion secondary battery which has the same quality as the prior art product can be manufactured at a low cost by making effective use of middle-grade white bran or high-grade white bran of rice.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: July 19, 2011
    Assignee: Enax, Inc.
    Inventors: Shoji Sasaki, Tsuyoshi Temma, Munehiro Kadowaki, Hironori Ozawa, Kazunori Ozawa, Syujun Shikano, Kanji Matsuda
  • Patent number: 7972725
    Abstract: Irreversible first cycle capacity loss in lithium secondary cells having a cell electrode based on a powdered material and a binder may be significantly decreased or eliminated by using an aliphatic or cycloaliphatic polyimide binder. Compared to conventional polyimide binders prepared by reacting an aromatic dianhydride and a diamine, the disclosed polyimide binders have decreased aromatic carbonyl content, may be less likely to undergo electrochemical reduction, and may be less likely to consume electrons that might otherwise help lithiate the electrode.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: July 5, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Larry J. Krause, Lowell D. Jensen
  • Patent number: 7947395
    Abstract: A graphite particle obtained by assembling or binding together a plurality of flat-shaped particles so that the planes of orientation are not parallel to one another, or a graphite particle in which aspect ratio is 5 or less or specific surface area is 8 m2/g or less or the size of crystallite in the direction of c-axis of the crystal is 500 ? or more and the size of crystallite in the direction of plane is 1,000 ? or less as measured by X ray broad angle diffraction, or a graphite particle in which pore volume of the pores having a size falling in a range of 102 to 106 ? is 0.4 to 2.0 cc/g per weight of graphite particle or pore volume of the pores having a size falling in a range of 1×102 to 2×104 ? is 0.08 to 0.4 cc/g per weight of graphite particle is suitable for production of negative electrode of lithium secondary battery, and a lithium secondary battery obtained therefrom is excellent in rapid charge-discharge characteristics, cycle characteristics, etc.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: May 24, 2011
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshito Ishii, Tatsuya Nishida, Atsushi Fujita, Kazuo Yamada
  • Patent number: 7867294
    Abstract: A process is provided to produce non-aqueous electrolytic solution for use in batteries having low acid content and low water content. The invention involves removing acids and water from non-aqueous electrolytic solutions typically found in lithium or lithium-ion batteries by using nitrogen-containing compounds such as triazines. After treatment by a triazine such as melamine, the concentrations of acids and water in the electrolytic solutions are substantially decreased. The present invention provides a process to prepare extremely pure electrolytic solutions having low (<20 ppm) concentrations of both water and acids.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: January 11, 2011
    Assignee: Novolyte Technologies Inc.
    Inventors: Zhongyi Deng, Jerry L. Decker, Wu Xu, John R. Sans, Pascal Bolomey
  • Patent number: 7862929
    Abstract: Disclosed are anode active material slurry for a lithium secondary cell having improved dispersibility of an anode active material and a conductive agent, and a lithium secondary cell comprising the same. Particularly, the present invention is characterized by adding a dispersant comprising a polymer backbone capable of surface-adsorption and a side-chain having non-ionic surfactant properties in a small amount, to the anode active material slurry comprising a carbon-based anode active material that is capable of lithium ion intercalation/deintercalation, a conductive agent, a binder comprising a styrene-butadiene-based polymer resin, a thickener comprising a cellulose-based or an acrylate-based resin, and water.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: January 4, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Seok Koo Kim, Cha Hun Ku, Soon Ho Ahn
  • Patent number: 7851088
    Abstract: Disclosed is a positive electrode active material for a nonaqueous electrolyte secondary battery having at least a lithium-transition metal composite oxide of a layer structure, in which an existence ratio of at least one selected from the group consisting of elements which may become tetravalent and magnesium is 20% or more on a surface of the lithium-transition metal composite oxide. By use of this positive electrode active material, a nonaqueous electrolyte secondary battery having excellent battery characteristics, specifically, having excellent high rate characteristics, cycle characteristics, low-temperature characteristics, thermal stability, and the like, under the even more harsh environment for use can be realized.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: December 14, 2010
    Assignee: Nichia Corporation
    Inventors: Takeshi Takahashi, Takeshi Oba, Kenji Fujino, Junichi Tokuno, Masuhiro Morizaki, Takeyuki Kondo, Jun Seyama
  • Patent number: 7846588
    Abstract: An electrolyte for a lithium secondary battery is provided. The electrolyte improves battery safety, high temperature storage characteristics, and electrochemical properties of lithium batteries. The electrolyte comprises at least one lithium salt and a non-aqueous organic solvent comprising a cyclic carbonate and a lactone-based compound. The lactone based compound comprises substituents selected from the group consisting of alkyl groups, alkenyl groups, alkynyl groups, aryl groups, and combinations thereof. A lithium battery is also provided, which comprises a negative electrode capable of intercalating/deintercalating lithium, a positive electrode capable of intercalating/deintercalating lithium, and an inventive electrolyte.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: December 7, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Cheol-Soo Jung, Bo-Geum Choi, Eui-Hwan Song
  • Publication number: 20100285358
    Abstract: A lithium ion battery electrode includes silicon nanowires used for insertion of lithium ions and including a conductivity enhancement, the nanowires growth-rooted to the conductive substrate.
    Type: Application
    Filed: May 7, 2009
    Publication date: November 11, 2010
    Applicant: AMPRIUS, INC.
    Inventors: Yi Cui, Song Han, Mark C. Platshon
  • Patent number: 7829222
    Abstract: Artificial graphite particles, having a secondary particle structure in which a plurality of primary particles composed of graphite are clustered or bonded together, and having a layer structure in which the edge portion of the primary particles is bent in a polyhedral shape.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: November 9, 2010
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Kouichi Takei, Hidetoshi Honbo, Juichi Arai, Manabu Kobayashi
  • Patent number: 7816037
    Abstract: The invention provides an anode material for lithium ion secondary battery using a coated graphite powder as a raw material, which is coated thermoplastic resin of a carbonization yield of ?20 wt % in a proportion of ?10 parts by weight the carbonized material per 100 parts by weight graphite powder. Coating with thermoplastic resin increases the accumulative pore volume by ?5%, relative to the uncoated powder, and results in pore sizes of 0.012-40 ?m via mercury porosimeter method. Calculated with the BJH method as viewed from desorption isotherm, the coated graphite powder has a mesopore volume ?0.01 cc/g or ?60% of the pore volume of the uncoated graphite powder. This coated powder also has an average particle size ranging from 10-50 ?m measured by a laser-scattering-particle-size-distribution measuring device, and a standard deviation to the average particle size (?/D) ratio of ?0.02.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: October 19, 2010
    Assignee: Toyo Tanso Co., Ltd.
    Inventors: Naoto Ohta, Katsuhide Nagaoka, Kazuhito Hoshi, Hidehiko Nozaki, Tetsuro Tojo, Toshiaki Sogabe
  • Patent number: 7781106
    Abstract: The invention provides a lithium secondary battery which is excellent in long-term cycle property and in battery characteristics, such as electric capacity and storage property, and a nonaqueous electrolytic solution usable for such a lithium secondary battery. The present invention relates to a lithium secondary battery including a positive electrode, a negative electrode, and a nonaqueous electrolytic solution containing an electrolyte salt dissolved in a nonaqueous solvent, characterized in that the positive electrode is made of a material including a lithium compound oxide, in that the negative electrode is made of a material including graphite, and in that the nonaqueous electrolytic solution contains dialkyl oxalate and further contains vinylene carbonate and/or 1,3-propanesultone, and a nonaqueous electrolytic solution for use in such a battery.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: August 24, 2010
    Assignee: UBE Industries, Ltd.
    Inventors: Koji Abe, Kazuhiro Miyoshi, Takaaki Kuwata, Yasuo Matsumori
  • Patent number: 7767350
    Abstract: A nonaqueous electrolyte battery includes: a cathode using a composite compound of lithium and transition metals as a positive active material; an anode using a negative active material capable of being doped with and doped from lithium; and a nonaqueous electrolyte interposed between the cathode and the anode. The nonaqueous electrolyte is obtained by dissolving LiMFm (M is an element selected from As, B, P and Sb, and m is an integer located within a range of 4 to 6.) and LiCnF2n+1 SO3 or LiN(CnF2n+1SO2)2 in a nonaqueous solvent including cyclic carbonate or non cyclic carbonate and having unsaturated carbonate added within a range of 0.1 volume % or more and 5 volume % or less, and the concentration of LiCnF2n+1SO3 or LiN(CnF2n+1SO2)2 is located within a range of 1 wt % or more and lower than 10 wt %. Thus, a self-discharge is suppressed and a storage property is improved.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: August 3, 2010
    Assignee: Sony Corporation
    Inventors: Shinsaku Ugawa, Tokio Kuwada
  • Patent number: 7754380
    Abstract: The present invention provides a nonaqueous electrolytic solution exhibiting excellent battery characteristics such as electrical capacity, cycle property and storage property and capable of maintaining the battery characteristics for a long tire, and a lithium secondary battery using the nonaqueous electrolytic solution. A nonaqueous electrolytic solution for a lithium secondary battery, in which an electrolyte salt is dissolved in a nonaqueous solvent, containing 0.1 to 10% by weight of an ethylene carbonate derivative represented by the general formula (I) shown below, and 0.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: July 13, 2010
    Assignee: UBE Industries, Ltd.
    Inventors: Koji Abe, Takaaki Kuwata
  • Patent number: 7749653
    Abstract: A battery is provided. In the battery including a cathode, an anode having an anode active material layer provided on an anode current collector, said anode active material layer containing a carbon material as an anode active material, and an electrolyte solution, the anode active material layer contains nano-particles of ceramic. The battery limits the precipitation of lithium on the surface of the anode, improves energy density and has an excellent cycle characteristics.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: July 6, 2010
    Assignee: Sony Corporation
    Inventors: Shinya Wakita, Izaya Okae
  • Patent number: 7745057
    Abstract: A nonaqueous electrolyte secondary battery 10 according to an embodiment of the invention includes a positive electrode 11, a negative electrode 12, a separator 13 and a nonaqueous electrolyte liquid in which not only the positive electrode 11 contains a positive electrode active material charged at or higher than 4.3 V based on lithium and a halogenated cyclic carbonate is added in the nonaqueous electrolyte liquid, but also an inorganic insulating material particle layer is formed on the surface of at least either of the positive electrode 11, the negative electrode 12 and the separator 13. By employing such a constitution in the present invention, a nonaqueous electrolyte secondary battery using a positive electrode charged at a high electric potential of 4.3 V or more based on lithium in which the amount of a generated gas is small even when the battery is overcharged at higher temperatures, and the impact safety and reliability thereof are high, can be provided.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: June 29, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takeshi Abe, Masato Iwanaga
  • Publication number: 20100159330
    Abstract: An object of the present invention is to provide a lithium secondary battery which has improved capacity, durability, and the other characteristic as compared with conventional lithium secondary batteries. [Means for Solution] A plate-like particle or a film for a lithium secondary battery cathode active material has a layered rock salt structure. The lithium ion gateway plane is oriented in parallel with a plate surface, which is a surface orthogonal to a thickness direction of the particle and thus exposed at the plate surface, a plurality of layers are stacked together in the thickness direction, and while the layers have the same crystal axis in the thickness direction, as for the plate surface direction perpendicular to the thickness direction, the layers have different crystal axes.
    Type: Application
    Filed: December 22, 2009
    Publication date: June 24, 2010
    Applicant: NGK Insulators, Ltd.
    Inventors: Ryuta SUGIURA, Nobuyuki Kobayashi, Shohei Yokoyama, Tsutomu Nanataki
  • Publication number: 20100159329
    Abstract: An object of the present invention is to improve the characteristics such as cell capacity, by raising the exposure of a crystal plane (a plane other than the (003) plane: e.g., (101) plane and (104) plane), through which lithium ions are favorably intercalated and deintercalated, to an electrolyte. A plate-like particle or a film for a lithium secondary battery cathode active material has a layered rock salt structure. A plane other than the (003) plane is oriented in parallel with the plate surface (a surface orthogonal to a thickness direction) and step-like structures are two-dimensionally formed along the plate surface.
    Type: Application
    Filed: December 22, 2009
    Publication date: June 24, 2010
    Applicant: NGK Insulators, Ltd.
    Inventors: Ryuta SUGIURA, Nobuyuki Kobayashi, Shohei Yokoyama, Tsutomu Nanataki
  • Patent number: 7736809
    Abstract: Disclosed is a rechargeable lithium ion battery including a positive electrode comprising a first current collector and a positive active material layer on the first current collector; a negative electrode comprising a second current collector and a negative active material layer on the second current collector; and an electrolyte comprising a non-aqueous organic solvent and a lithium salt. At least one of the first and the second current collectors includes a rigid polymer film with a metal deposited on the rigid polymer film.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: June 15, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Duck-Chul Hwang, Yun-Suk Choi, Zin Park, Jong-Ki Lee, Jea-Woan Lee, Chung-Kun Cho
  • Publication number: 20100143800
    Abstract: The present invention relates to a negative active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery including the same. The negative active material for a lithium secondary battery includes a compound and a carbon composite represented by the following Chemical Formula 1. LiaVbMcO2+d ??[Chemical Formula 1] In the above Chemical Formula 1, a, b, c, and d represent a composition ratio, 0.1?a?2.5, 0.5?b?1.5, 0?c?0.5, 0?d?0.5, and M is Mg, Si, Sc, Cu, Zu, Nb, Y, or a combination thereof.
    Type: Application
    Filed: October 27, 2009
    Publication date: June 10, 2010
    Applicants: Samsung SDI Co., Ltd., TAYCA CORPORATION
    Inventors: Katsuya SAWADA, Takeshi Deguchi, Naoya Kobayashi, Toru Inagaki, Sung-Soo Kim
  • Patent number: 7709156
    Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material; a negative electrode containing a negative electrode active material; and a non-aqueous electrolyte containing a non-aqueous solvent and an electrolyte salt. In order to improve the high-temperature storage characteristics and safety against overcharge due to high-rate charging of the battery, the positive electrode active material contains a layered lithium-transition metal composite oxide containing at least one of Mg, Al, Ti, and Zr. Furthermore, the non-aqueous electrolyte contains 3 to 80% by mass of a tertiary carboxylic acid ester expressed by Chemical Formula 2 below, based on the total mass of the non-aqueous solvent: where R1 to R4 are independent of each other and each represents an alkyl group having 4 or less carbon atoms and being able to be branched.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: May 4, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Kentaro Takahashi
  • Patent number: 7700239
    Abstract: A graphite particle obtained by assembling or binding together a plurality of flat-shaped particles so that the planes of orientation are not parallel to one another, or a graphite particle in which aspect ratio is 5 or less or specific surface area is 8 m2/g or less or the size of crystallite in the direction of c-axis of the crystal is 500 ? or more and the size of crystallite in the direction of plane is 1,000 ? or less as measured by X ray broad angle diffraction, or a graphite particle in which pore volume of the pores having a size falling in a range of 102 to 106 ? is 0.4 to 2.0 cc/g per weight of graphite particle or pore volume of the pores having a size falling in a range of 1×102 to 2×104 ? is 0.08 to 0.4 cc/g per weight of graphite particle is suitable for production of negative electrode of lithium secondary battery, and a lithium secondary battery obtained therefrom is excellent in rapid charge-discharge characteristics, cycle characteristics, etc.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: April 20, 2010
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshito Ishii, Tatsuya Nishida, Atsushi Fujita, Kazuo Yamada
  • Patent number: 7695649
    Abstract: Disclosed are primary materials, precursor materials and final materials as well as methods to prepare these materials. The final materials are mixed lithium transition metal oxides, useful as performance optimized cathode materials for rechargeable lithium batteries. The transition metal is a solid solution mixture of manganese, nickel and cobalt, M=(Mn1-uNiu)1-u-yCoy, with 0.2.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: April 13, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Jens Martin Paulsen, Ki Young Lee, Joon Sung Bae, Mun Ju Kim
  • Patent number: 7687428
    Abstract: A method of preparing carbon-loaded, gold-based nanoparticle catalysts useful as anode catalysts for the electrocatalytic methanol oxidation reaction (MOR) as well as the oxygen reduction reaction (ORR). AumPtnM100-m-n catalysts may be prepared by either a two-phase protocol or by a thermal decomposition/reduction protocol. The prepared nanoparticles having different bimetallic ratios are assembled on carbon black support materials and activated by thermal treatment. This approach provides good control of nanoparticle size, composition and/or surface properties. Electrocatalytic MOR activities of the prepared and activated AuPt nanoparticle provided in accordance with the methods of the invention are present in both acidic and alkaline electrolytes.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: March 30, 2010
    Assignee: The Research Foundation of the State University of New York
    Inventors: Chuan-Jian Zhong, Jin Luo, Nancy N. Kariuki, Linyang Wang, Peter Njoki, Derrick Mott
  • Patent number: 7682754
    Abstract: The invention relates to the use of an amine oxide as an additive in a nonaqueous electrolytic solution. The electrolytic solution is suitable for use in electrochemical cells such as lithium batteries and lithium ion batteries. Batteries using this electrolyte solution have long life and high capacity retention.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: March 23, 2010
    Assignee: Novolyte Technologies, Inc.
    Inventors: Wu Xu, Zhongyi Deng, Vaikunth S. Prabhu, Pascal Bolomey
  • Patent number: 7682750
    Abstract: A lithium ion battery includes a cathode (10) having a plurality of lithium-cobalt-nickel oxide nanoparticles, an anode (20) having at least one carbon nanotube array (22), an electrolyte, and a membrane (30) separating the anode from the cathode. The carbon nanotube array includes a plurality of multi-walled carbon nanotubes (23). Preferably, an average diameter of an outermost wall of the multi-walled carbon nanotubes is in the range from 10 to 100 nanometers, and a pitch between adjacent multi-walled carbon nanotubes is in the range from 20 to 500 nanometers. In the carbon nanotube array, the lithium ions are able to intercalate not only inside the multi-walled carbon nanotubes, but also in the interstices between adjacent multi-walled carbon nanotubes. Thus a density of intercalation of the carbon nanotube array is significantly higher than that of graphite.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: March 23, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Ga-Lane Chen