Cadmium Component Is Active Material Patents (Class 429/222)
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Publication number: 20120028114Abstract: A cathode composite material includes a cathode active material particle having a surface, and a continuous aluminum phosphate layer coated on the surface of the cathode active material particle. A material of the cathode active material particle is spinel type lithium manganese oxide. The present disclosure also relates to a lithium ion battery and a method for making the cathode composite material.Type: ApplicationFiled: May 13, 2011Publication date: February 2, 2012Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITYInventors: XIAN-KUN HUANG, XIANG-MING HE, CHANG-YIN JIANG, DAN WANG, JIAN GAO, JIAN-JUN LI
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Publication number: 20120028115Abstract: A cathode composite material includes a cathode active material particle having a surface, and a continuous aluminum phosphate layer coated on the surface of the cathode active material particle. A material of the cathode active material particle is layered type lithium nickel oxide. The present disclosure also relates to a lithium ion battery and a method for making the cathode composite material.Type: ApplicationFiled: May 13, 2011Publication date: February 2, 2012Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITYInventors: XIAN-KUN HUANG, XIANG-MING HE, CHANG-YIN JIANG, DAN WANG, JIAN GAO, JIAN-JUN LI
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Publication number: 20120009449Abstract: According to one embodiment, there is provided an active material for a battery. The active material includes secondary particle which contains primary particles of a monoclinic ?-type titanium composite oxide having an average primary particle diameter of 1 nm to 10 ?m. The secondary particle has an average secondary particle diameter of 1 ?m to 100 ?m. The secondary particle has compression fracture strength of 20 MPa or more.Type: ApplicationFiled: March 22, 2011Publication date: January 12, 2012Inventors: Hiroki INAGAKI, Wen ZHANG, Yasuhiro HARADA, Keigo HOSHINA, Yuki OTANI, Norio TAKAMI
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Publication number: 20110311872Abstract: A lithium secondary battery having improved output characteristics is provided. A high voltage mixed positive electrode active material has an even profile without causing a rapid voltage drop over the entire SOC area by improving a rapid voltage drop phenomenon occurring due to the difference between the operation voltages of mixed lithium transition metal oxides, and improves output characteristics at a low voltage. The lithium secondary battery includes the mixed positive electrode active material. In particular, the lithium secondary battery can sufficiently satisfy the required conditions such as output characteristics, capacity, stability, and the like, when it is used as a power source of a midsize or large device such as an electric vehicle.Type: ApplicationFiled: June 23, 2011Publication date: December 22, 2011Applicant: LG CHEM, LTD.Inventors: Song Taek OH, Sun Kyu KIM, Geun Chang CHUNG, Keun Wan AN
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Publication number: 20110305952Abstract: A negative active material, an electrode including the same, and a lithium battery including the electrode. The negative active material has no volumetric expansion and has high solubility with respect to lithium. In addition, the negative active material is in the form of spherical particles, and thus does not require a separate granulating process. Moreover, the negative active material may enhance the capacity of a lithium battery.Type: ApplicationFiled: December 17, 2010Publication date: December 15, 2011Applicant: SAMSUNG SDI CO., LTD.Inventors: Deok-Hyun Kim, Jae-Myung Kim, Kyu-Nam Joo, So-Ra Lee, Jong-Hee Lee, Young-Su Kim, Gu-Hyun Chung, Beom-Kwon Kim
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Publication number: 20110287316Abstract: The invention relates generally to carbon nano-tube composites and particularly to carbon nano-tube compositions for electrochemical energy storage devices and a method for making the same.Type: ApplicationFiled: May 23, 2011Publication date: November 24, 2011Applicant: ADA TECHNOLOGIES, INC.Inventors: Wen Lu, Joshua Buettner-Garrett, Michael Krysiak
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Patent number: 8039150Abstract: Zinc electrodes for use in batteries, the electrode containing an organic gelling agent, an organic binding agent, calcium zincate and an electro-active element. A method of manufacturing such electrodes, and use of such electrodes in primary and secondary batteries.Type: GrantFiled: April 20, 2006Date of Patent: October 18, 2011Assignee: Revoit Technology Ltd.Inventors: Trygve Burchardt, Romuald Franklin Ngamga
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Publication number: 20110244329Abstract: Provided are a cathode active material for a lithium secondary battery and a lithium secondary battery including the same. The cathode active material includes a lithium composite oxide represented by the following Chemical Formula 1. Li[LizA]O2 A={M11-x-y(M10.78Mn0.22)x}M2y??[Chemical Formula 1] In Chemical Formula, M1 and M2 are independently one or more selected from a transition element, a rare earth element, or a combination thereof, M1 and M2 are elements that are different from each other, ?0.05?z?0.1, 0.8?x+y?1.8, and 0.05?y?0.35, and Ni has an oxidation number of 2.01 to 2.4.Type: ApplicationFiled: March 20, 2009Publication date: October 6, 2011Applicant: L F Material Co., Ltd.Inventors: Yoon Han Chang, Sang-Hoon Jeon, Chang-Won Park
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Publication number: 20110236758Abstract: A non-aqueous electrolyte secondary battery according to the present invention has a positive electrode comprising a positive electrode active material, a negative electrode comprising a negative electrode active material and a non-aqueous electrolyte, wherein a mixture of at least one metal selected from zinc and cadmium having an average particle diameter in a range of from 0.25 ?m to 100 ?m and carbon is used as the negative electrode active material.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yasufumi Takahashi, Masahisa Fujimoto
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Publication number: 20110200876Abstract: A positive electrode having a surface on which a positive electrode active material composition including a positive electrode active material is formed. The positive electrode includes a first lithium compound having an open-circuit voltage less than 3V with respect to lithium metal, and a second lithium compound having an open-circuit voltage of 3 V or greater with respect to lithium metal. The first lithium compound includes a solid solution represented by Formula 1: xLizM1-yM?yO2-(1?x)LiaM?bMocO3.Type: ApplicationFiled: February 16, 2011Publication date: August 18, 2011Inventor: Kyu-Sung Park
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Patent number: 7976976Abstract: Composite current collectors containing coatings of metals, alloys or compounds, selected from the group of Zn, Cd, Hg, Ga, In, Tl, Sn, Pb, As, Sb, Bi and Se on non-metallic, non-conductive or poorly-conductive substrates are disclosed. The composite current collectors can be used in electrochemical cells particularly sealed cells requiring a long storage life. Selected metals, metal alloys or metal compounds are applied to polymer or ceramic substrates by vacuum deposition techniques, extrusion, conductive paints (dispersed as particles in a suitable paint), electroless deposition, cementation; or after suitable metallization by galvanic means (electrodeposition or electrophoresis). Metal compound coatings are reduced to their respective metals by chemical or galvanic means. The current collectors described are particular suitable for use in sealed primary or rechargeable galvanic cells containing mercury-fee and lead-free alkaline zinc electrodes.Type: GrantFiled: February 1, 2008Date of Patent: July 12, 2011Assignee: Rosecreek Technologies Inc.Inventor: Klaus Tomantschger
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Publication number: 20110159375Abstract: The present application is directed to carbon materials comprising an electrochemical modifier. The carbon materials find utility in any number of electrical devices, for example, in lead acid batteries. Methods for making the disclosed carbon materials are also disclosed.Type: ApplicationFiled: December 10, 2010Publication date: June 30, 2011Applicant: EnerG2, Inc.Inventors: Aaron M. Feaver, Henry R. Costantino, Matthew J. Maroon, Katharine Geramita, Alan Tzu-Yang Chang
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Publication number: 20110111294Abstract: High capacity silicon based anode active materials are described for lithium ion batteries. These materials are shown to be effective in combination with high capacity lithium rich cathode active materials. Supplemental lithium is shown to improve the cycling performance and reduce irreversible capacity loss for at least certain silicon based active materials. In particular silicon based active materials can be formed in composites with electrically conductive coatings, such as pyrolytic carbon coatings or metal coatings, and composites can also be formed with other electrically conductive carbon components, such as carbon nanofibers and carbon nanoparticles. Additional alloys with silicon are explored.Type: ApplicationFiled: November 3, 2010Publication date: May 12, 2011Inventors: Heman A. Lopez, Yogesh Kumar Anguchamy, Haixia Deng, Yongbong Han, Charan Masarapu, Subramanian Venkatachalam, Sujeet Kumar
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Publication number: 20110104551Abstract: The present invention provides a composite material suitable for use in an anode for a lithium ion battery, the composite material comprising a layer of a lithium-alloying material on the walls of an aligned nanotubular base material. Preferably, the lithium-alloying material comprises a material selected from the group consisting of Si, Sn, Pb, Al, Au, Pt, Zn, Cd, Ag, Mg, and a combination of two or more of the foregoing.Type: ApplicationFiled: November 3, 2010Publication date: May 5, 2011Applicant: UCHICAGO ARGONNE, LLCInventors: Junbing YANG, Wenquan LU
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Publication number: 20110104568Abstract: A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same, the negative electrode including a current collector; and an active material layer formed on the current collector. The active material layer includes a solid solution of a metallic component, and an active material that is capable of forming a lithium-included compound, the metallic component selected from Cu, Ti, a Cu—X alloy, a Ti—X alloy, and a combination thereof. In the alloys, X is selected from an alkaline metal, an alkaline-earth metal, a Group 13 element excluding Ti, a Group 14 element, a transition element excluding Cu, a rare earth element, and a combination thereof.Type: ApplicationFiled: October 8, 2010Publication date: May 5, 2011Inventors: Min-Seok Sung, Goo-Jin Jeong, Sang-Min Lee, Kyeu-Yoon Sheem, Yong-Mook Kang, Sung-Soo Kim
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Publication number: 20110086270Abstract: Relatively disordered mesoporous particulate materials have internal porosity, a surface area of 100 m2/g or greater with a network of pores characterised by a peak in the pore size distribution at a value between 2 and 20 nm and a ratio of the half-height width of the distribution's peak to the pore diameter axis position of the peak of at least 0.6.Type: ApplicationFiled: February 27, 2009Publication date: April 14, 2011Inventors: Katherine Elizabeth Amos, Tobias James Gordon-Smith, Alan Daniel Spong
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Publication number: 20110052981Abstract: Lithium rich and manganese rich lithium metal oxides are described that provide for excellent performance in lithium-based batteries. The specific compositions can be engineered within a specified range of compositions to provide desired performance characteristics. Selected compositions can provide high values of specific capacity with a reasonably high average voltage. Compositions of particular interest can be represented by the formula, xLi2MnO3.(1?x)LiNiu+?Mnu??CowAyO2. The compositions undergo significant first cycle irreversible changes, but the compositions cycle stably after the first cycle.Type: ApplicationFiled: August 27, 2010Publication date: March 3, 2011Inventors: Herman A. Lopez, Subramanian Venkatachalam, Deepak Kumaar Kandasamy Karthikeyan, Sujeet Kumar
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Publication number: 20110052989Abstract: Lithium dopant is introduced into lithium rich high capacity positive electrode active materials as a substitution for manganese within the complex metal oxides. In some embodiments, the lithium doped compositions can be written in a two component notation as x.Li2MnO3.(1?x)LiNiu+?Mnu???dLidCowO2, where d ranges from about 0.004 to about 0.25 and 2u+w is approximately equal to 1. The materials are believed to form a layer-layer composite crystal structure that has very good cycling properties at high voltages, although the materials exhibit significant first cycle irreversible capacity loss.Type: ApplicationFiled: August 27, 2010Publication date: March 3, 2011Inventors: Subramanian Venkatachalam, Deepak Kumaar Kandasamy Karthikeyan, Shabab Amiruddin, Herman A. Lopez
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PROTECTED ACTIVE METAL ELECTRODE AND BATTERY CELL WITH IONICALLY CONDUCTIVE PREOTECTIVE ARCHITECTURE
Publication number: 20110014522Abstract: Active metal and active metal intercalation electrode structures and battery cells having ionically conductive protective architecture including an active metal (e.g., lithium) conductive impervious layer separated from the electrode (anode) by a porous separator impregnated with a non-aqueous electrolyte (anolyte). This protective architecture prevents the active metal from deleterious reaction with the environment on the other (cathode) side of the impervious layer, which may include aqueous or non-aqueous liquid electrolytes (catholytes) and/or a variety electrochemically active materials, including liquid, solid and gaseous oxidizers. Safety additives and designs that facilitate manufacture are also provided.Type: ApplicationFiled: September 22, 2010Publication date: January 20, 2011Applicant: POLYPLUS BATTERY COMPANYInventors: Steven J. Visco, Bruce D. Katz, Yevgeniy S. Nimon, Lutgard C. De Jonghe -
Publication number: 20100316896Abstract: A battery, comprising a case, an electrode assembly within the case, wherein the electrode assembly includes a positive electrode and a negative electrode, and positive and negative conductors electrically connected to the positive and negative electrodes, respectively, at a substantially similar point on the respective electrode assembly such that current flows in opposite directions through the positive and negative electrodes. The positive and negative conductors are closely routed so as to be aligned and in close proximity. As a result, magnetic fields generated by the positive and negative electrodes and the positive and negative conductors are substantially cancelled.Type: ApplicationFiled: June 10, 2009Publication date: December 16, 2010Applicant: RESEARCH IN MOTION LIMITEDInventors: Andre John VAN SCHYNDEL, Larry Edward Hawker, George Soliman Mankaruse
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Patent number: 7842268Abstract: To provide a cathode active material for a lithium secondary battery, which is low in gas generation and has high safety and excellent durability for charge and discharge cycles even at a high charge voltage. A process for producing a lithium-containing composite oxide represented by the formula LipLqNxMyOzFa (wherein L is at least one element selected from the group of B and P, N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9?p?1.1, 1.0?q<0.03, 0.97?x<1.00, 0?y?0.03, 1.9?z?2.1, q+x+y=1 and 0?a?0.Type: GrantFiled: August 14, 2007Date of Patent: November 30, 2010Assignee: AGC Seimi Chemical Co., Ltd.Inventors: Takeshi Kawasato, Tokumitsu Kato, Megumi Uchida, Naoshi Saito, Manabu Suhara
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Publication number: 20100266897Abstract: The present invention relates to electrochemical storage devices, such as supercapacitors, batteries, etc., and more particularly to such devices that comprise an electrochemically active coaxial nanowire. The invention particularly concerns such devices in which the coaxial nanowire comprises an inner core of a transition metal oxide and an axially surrounding outer shell composed of an electroconductive organic polymer, such as poly(3,4-ethylenedioxythiophene) (PEDOT). The invention particularly relates to a facile method for achieving the self-assembly of such coaxial nanowires.Type: ApplicationFiled: December 9, 2008Publication date: October 21, 2010Applicant: UNIVERSITY OF MARYLAND, COLLEGE PARKInventors: Sang Bok Lee, Ran Liu, Seungil Cho
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Patent number: 7815888Abstract: Disclosed is a process for producing a secondary battery cathode material by calcining raw materials. The process is characterized by calcining the raw materials together with one or more substances, which are selected from the group consisting of hydrogen, water and water vapor, and conductive carbon and/or a substance, which can form conductive carbon by pyrolysis, added thereto. As crystals of the secondary battery cathode material obtained by this process have been controlled fine sizes, the secondary battery cathode material promotes movements of ions of an alkali metal led by lithium between the interiors of grains of the cathode material and an electrolyte to suppress polarization in an electrode reaction, and further, increases an area of contact between the positive material and a conductivity-imparting material to provide improved conductivity so that improvements are assured in voltage efficiency and specific battery capacity.Type: GrantFiled: July 31, 2002Date of Patent: October 19, 2010Assignees: Mitsui Engineering & Shipbuilding Co., Ltd.Inventors: Naoki Hatta, Shigeto Okada, Jun-Ichi Yamaki
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Publication number: 20100173198Abstract: The present invention provides a lithium ion battery that exhibits a significantly improved specific capacity and much longer charge-discharge cycle life. In one preferred embodiment, the battery comprises an anode active material that has been prelithiated and pre-pulverized. This anode may be prepared with a method that comprises (a) providing an anode active material (preferably in the form of fine powder or thin film); (b) intercalating or absorbing a desired amount of lithium into the anode active material to produce a prelithiated anode active material; (c) comminuting the prelithiated anode active material into fine particles with an average size less than 10 ?m (preferably <1 ?m and most preferably <200 nm); and (d) combining multiple fine particles of the prelithiated anode active material with a conductive additive and/or a binder material to form the anode. Preferably, the prelithiated particles are protected by a lithium ion-conducting matrix or coating material.Type: ApplicationFiled: January 2, 2009Publication date: July 8, 2010Inventors: Aruna Zhamu, Bor Z. Jang
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Patent number: 7745047Abstract: The present invention provides a nano-scaled graphene platelet-based composite 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 lithium ions; and (b) a plurality of nano-scaled graphene platelets (NGPs), wherein a platelet comprises a graphene sheet or a stack of graphene sheets having a platelet thickness less than 100 nm; wherein at least one of the particles or coating is physically attached or chemically bonded to at least one of the graphene platelets and the amount of platelets is in the range of 2% to 90% by weight and the amount of particles or coating in the range of 98% to 10% by weight. Also provided is a lithium secondary battery comprising such a negative electrode (anode). The battery exhibits an exceptional specific capacity, an excellent reversible capacity, and a long cycle life.Type: GrantFiled: November 5, 2007Date of Patent: June 29, 2010Assignee: Nanotek Instruments, Inc.Inventors: Aruna Zhamu, Bor Z. Jang
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Publication number: 20100143799Abstract: A cathode and a lithium battery including the cathode have improved electrical characteristics. The cathode includes a cathode active material composition including a conducting agent, a binder, and a cathode active material, wherein the cathode active material includes a first lithium compound and a second lithium compound, the first lithium compound having an open-circuit voltage greater than an open-circuit voltage of the second lithium compound, and wherein the second lithium compound includes a metal oxide coating layer.Type: ApplicationFiled: December 4, 2009Publication date: June 10, 2010Applicant: Samsung SDI Co., Ltd ofInventor: Kyu-Sung PARK
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Patent number: 7709115Abstract: The present invention is directed to methods for making magnetically modified electrodes and electrodes made according to the method. Such electrode are useful as electrodes in batteries, such as Ni-MH batteries, Ni—Cd batteries, Ni—Zn batteries and Ni—Fe batteries.Type: GrantFiled: February 3, 2003Date of Patent: May 4, 2010Assignee: University of Iowa Research FoundationInventors: Johna Leddy, Pengcheng Zou
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Patent number: 7695867Abstract: Disclosed is a method for regulating terminal voltage of a cathode during overdischarge. Also disclosed is a lithium secondary battery, which is low in capacity loss after overdischarge, having excellent capacity restorability after overdischarge and shows an effect of preventing a battery from swelling at a high temperature.Type: GrantFiled: September 24, 2004Date of Patent: April 13, 2010Assignee: LG Chem, Ltd.Inventors: Sung Kyun Chang, Seung Tae Hong, Hyeong Jin Kim, Duk Hyun Ryu, Eun Young Goh, Ho Chun Lee, Jun Yong Jeong, Jin Hee Yeon, Hyung Keun Lee
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Publication number: 20090305135Abstract: This invention provides a nanocomposite-based lithium battery electrode comprising: (a) A porous aggregate of electrically conductive nano-filaments that are substantially interconnected, intersected, physically contacted, or chemically bonded to form a three-dimensional network of electron-conducting paths, wherein the nano-filaments have a diameter or thickness less than 1 ?m (preferably less than 500 nm); and (b) Sub-micron or nanometer-scale electro-active particles that are bonded to a surface of the nano-filaments with a conductive binder material, wherein the particles comprise an electro-active material capable of absorbing and desorbing lithium ions and wherein the electro-active material content is no less than 25% by weight based on the total weight of the particles, the binder material, and the filaments. Preferably, these electro-active particles are coated with a thin carbon layer. This electrode can be an anode or a cathode.Type: ApplicationFiled: June 4, 2008Publication date: December 10, 2009Inventors: Jinjun Shi, Aruna Zhamu, Bor Z. Jang
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NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE HAVING THE SAME AND LITHIUM SECONDARY BATTERY
Publication number: 20090297945Abstract: A lithium secondary battery includes a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, a separator separating the positive electrode from the negative electrode, and an electrolyte. The negative electrode active material includes a graphite core particle, at least one metal particle located on the graphite core particle, and a polymer film coating the graphite core particle and the at least one metal particle. The polymer includes a polyimide- or polyacrylate-based polymer.Type: ApplicationFiled: May 22, 2009Publication date: December 3, 2009Inventors: Cheol-Hee Hwang, Bong-Chull Kim, Jong-Chan Kim, Se-Ho Park, Na-Rae Won -
Publication number: 20090186276Abstract: This invention provides a hybrid nano-filament composition for use as a cathode active material. The composition comprises (a) an aggregate of nanometer-scaled, electrically conductive filaments that are substantially interconnected, intersected, or percolated to form a porous, electrically conductive filament network, wherein the filaments have a length and a diameter or thickness with the diameter or thickness being less than 500 nm; and (b) micron- or nanometer-scaled coating that is deposited on a surface of the filaments, wherein the coating comprises a cathode active material capable of absorbing and desorbing lithium ions and the coating has a thickness less than 10 ?m, preferably less than 1 ?m and more preferably less than 500 nm. Also provided is a lithium metal battery or lithium ion battery that comprises such a cathode. Preferably, the battery includes an anode that is manufactured according to a similar hybrid nano filament approach.Type: ApplicationFiled: January 18, 2008Publication date: July 23, 2009Inventors: Aruna Zhamu, Bor Z. Jang
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Publication number: 20090176159Abstract: This invention provides a mixed nano-filament composition for use as an electrochemical cell electrode. The composition comprises: (a) an aggregate of nanometer-scaled, electrically conductive filaments that are substantially interconnected, intersected, or percolated to form a porous, electrically conductive filament network, wherein the filaments have a length and a diameter or thickness with the diameter/thickness less than 500 nm (preferably <100 nm) and a length-to-diameter or length-to-thickness aspect ratio greater than 10; and (b) Multiple nanometer-scaled, electro-active filaments comprising an electro-active material capable of absorbing and desorbing lithium ions wherein the electro-active filaments have a diameter or thickness less than 500 nm (preferably <100 nm). The electro-active filaments (e.g., nanowires) and the electrically conductive filaments (e.g.Type: ApplicationFiled: January 9, 2008Publication date: July 9, 2009Inventors: Aruna Zhamu, Bor Z. Jang
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Publication number: 20090169996Abstract: This invention provides a hybrid nano-filament composition for use as an electrochemical cell electrode. The composition comprises: (a) an aggregate of nanometer-scaled, electrically conductive filaments that are substantially interconnected, intersected, or percolated to form a porous, electrically conductive filament network comprising substantially interconnected pores, wherein the filaments have an elongate dimension and a first transverse dimension with the first transverse dimension being less than 500 nm (preferably less than 100 nm) and an aspect ratio of the elongate dimension to the first transverse dimension greater than 10; and (b) micron- or nanometer-scaled coating that is deposited on a surface of the filaments, wherein the coating comprises an anode active material capable of absorbing and desorbing lithium ions and the coating has a thickness less than 20 ?m (preferably less than 1 ?m). Also provided is a lithium ion battery comprising such an electrode as an anode.Type: ApplicationFiled: January 2, 2008Publication date: July 2, 2009Inventors: Aruna Zhamu, Bor Z. Jang
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Publication number: 20090098461Abstract: An electrochemical generator comprising at least one negative electrode and at least one positive electrode, said positive electrode comprising a paste comprising an electrochemically active material, a binder and strontium sulphate SrSO4, the proportion by weight of strontium sulphate in said paste being greater than 0.1% and less than or equal to 10%. This generator exhibits a reduced deterioration in performances at a high discharge rate.Type: ApplicationFiled: October 3, 2008Publication date: April 16, 2009Applicant: SAFT GROUPE SAInventors: Patrick BERNARD, Lionel Goubault, Olivier Guiader
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Publication number: 20090081548Abstract: The positive electrode of the lithium ion secondary battery includes active material particles containing a lithium composite oxide represented by: LivNi1-w-x-y-zCowCaxMgyMzO2 (0.85?v?1.25, 0<w?0.75, 0<x?0.1, 0<y?0.1, 0?z?0.75, 0<w+x+y+z?0.80, and element M is an element other than Co, Ca, and Mg), and (i) when 0<z, element M includes element Me of at least one selected from the group consisting of Mn, Al, B, W, Nb, Ta, In, Mo, Sn, Ti, Zr, and Y; and element Mc of at least one selected from the group consisting of Ca, Mg, and element Me is distributed more in the surface layer portion compared with the inner portion of the active material particles, and (ii) when 0=z, element Mc of at least one selected from the group consisting of Ca and Mg is distributed more in the surface layer portion compared with the inner portion of the active material particles.Type: ApplicationFiled: June 12, 2006Publication date: March 26, 2009Inventor: Kensuke Nakura
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Publication number: 20090081558Abstract: There is disclosed an active material for a non-aqueous electrolyte battery includes titanium-containing oxide having a crystal structure belonging to P4332 space group.Type: ApplicationFiled: July 21, 2008Publication date: March 26, 2009Inventors: Hiroki Inagaki, Keigo Hoshina, Norio Takami
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Publication number: 20090081549Abstract: A composition for use in an electrochemical redox reaction is described. The composition may comprise a material represented by a general formula MyXO4 or AxMyXO4, where each of A (where present), M, and X independently represents at least one element, O represents oxygen, and each of x (where present) and y represent a number, and an oxide of at least one of various elements, wherein the material and the oxide are cocrystailine, and/or wherein a volume of a crystalline structural unit of the composition may be different than a volume of a crystalline structural unit of the material alone. An electrode comprising such a composition is also described, as is an electrochemical cell comprising such an electrode. A process of preparing a composition for use in an electrochemical redox reaction is also described.Type: ApplicationFiled: November 5, 2008Publication date: March 26, 2009Inventors: Ben-Jie Liaw, Wen-Ren Liu, Sheng-Shih Chang
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Publication number: 20090081547Abstract: The present invention aims to achieve both safety upon shorting by a nail penetration and safety upon overcharging. In a lithium ion secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, the positive electrode includes active material particles, the active material particles include secondary particles of the lithium composite oxide, and some of the secondary particles have a crack. At least a surface layer portion of the active material particles includes element Me of at least one selected from the group consisting of Mn, Al, Mg, Ca, Zr, B, W, Nb, Ta, In, Mo, and Sn. Element Me is distributed more in the surface layer portion compared with the inner portion of the active material particles.Type: ApplicationFiled: June 26, 2006Publication date: March 26, 2009Inventor: Kensuke Nakura
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Publication number: 20090061314Abstract: The present invention provides a method for the processing of particles of metal phosphates or particles of mixed metal phosphates and in particular lithiated metal phosphates and mixed metal phosphates. The processing occurs, for example using a mechanofusion system as depicted in FIGS. 1 and 2. In general, the powder materials are placed in a rotary container and are subjected to centrifugal force and securely pressed against the wall of the container. The material then undergoes strong compression and shearing forces when it is trapped between the wall of the container and the inner piece of the rotor with a different curvature (FIG. 2). Particles of the material are brought together with such force that they adhere to one another. In the mechanofusion system, as indicated in FIG. 2, the powder material is delivered through slits on the rotary walls. It is carried up above the rotors by the rotor-mounted circulating blades.Type: ApplicationFiled: August 30, 2007Publication date: March 5, 2009Inventor: Ming Dong
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Patent number: 7452632Abstract: A negative active material for a rechargeable lithium battery, a method for making the negative active material, and a rechargeable lithium battery including a carbonaceous material, which is capable of reversibly intercalating and deintercalating lithium, and particles of a metal or a metal compound or mixtures thereof, distributed in the carbonaceous material, the metal or the metal compound being capable of forming an alloy with lithium during electrochemical charging and discharging.Type: GrantFiled: May 19, 2004Date of Patent: November 18, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Sang-Min Lee, Sung-Soo Kim, Kyou-Yoon Sheem, Sang-Jin Kim, Joon-Sup Kim, Seong-Mo Oh
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NEGATIVE ELECTRODE FOR RECHARGEABLE LITHIUM BATTERY, AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME
Publication number: 20080268338Abstract: The negative electrode for a rechargeable lithium battery includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes a metal-based negative active material and sheet-shaped graphite and has porosity of 20 to 80 volume %. The negative electrode for a rechargeable lithium battery can improve cell characteristics by inhibiting volume change and stress due to active material particle bombardment during charge and discharge, and by decreasing electrode resistance.Type: ApplicationFiled: January 22, 2008Publication date: October 30, 2008Applicant: Samsung SDI Co., Ltd.Inventors: SANG-MIN LEE, Goo-Jin Jeong, Min-Seok Sung, Yong-Mook Kang, Wan-Uk Choi, Sung-Soo Kim -
Patent number: 7438992Abstract: The invention provides novel lithium-mixed metal materials which, upon electrochemical interaction, release lithium ions, and are capable of reversibly cycling lithium ions. The invention provides a rechargeable lithium battery which comprises an electrode formed from the novel lithium-mixed metal materials. Methods for making the novel lithium-mixed metal materials and methods for using such lithium-mixed metal materials in electrochemical cells are also provided. The lithium-mixed metal materials comprise lithium and at least one other metal besides lithium. Preferred materials are lithium-mixed metal phosphates which contain lithium and two other metals besides lithium.Type: GrantFiled: February 16, 2006Date of Patent: October 21, 2008Assignee: Valence Technology, Inc.Inventors: Jeremy Barker, M. Yazid Saidi
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Publication number: 20080248396Abstract: An electrode, for a rechargeable lithium battery, including a current collector; an active material layer disposed on the current collector; and a coating layer disposed on the active material layer. The coating layer includes a lithium ion conductive polymer and an inorganic material represented by Formula 1: MwHxPyOz, wherein M is an element selected from the group consisting of an alkali metal, an alkaline-earth metal, a Group 13 element, a Group 14 element, a transition element, a rare earth element, and a combination thereof; and 1?w?4, 0?x?4, 1?y?7, and 2?z?30.Type: ApplicationFiled: May 22, 2007Publication date: October 9, 2008Applicant: Samsung SDI Co., LtdInventors: Euy-Young Jung, Duck-Chul Hwang, Yong-Chul Park, Jeom-Soo Kim, Jong-Hwa Lee, Jae-Yul Ryu, So-Hyun Hur
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Publication number: 20080248400Abstract: A positive electrode includes a current collector and a positive electrode active material layer. The positive electrode active material layer includes a positive electrode active material including a core including a compound LiaCO1?bMbO2 and a surface-treatment layer. In the core compound, 0.95?a?1.1, 0.002?b?0.02, and M is one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, In, Tl, Si, Ge, Sn, P, As, Sb, Bi, S, Se, Te, Po. The surface-treatment layer includes a compound including element of P, and one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, In, Ti, Si, Ge, Sn, As, Sb, Bi, S, Se, Te, Po.Type: ApplicationFiled: August 16, 2007Publication date: October 9, 2008Applicant: Samsung SDI Co., Ltd.Inventors: Duck-Chul HWANG, Yong-Chul Park, Jeom-Soo Kim, Jae-Yul Ryu, Jong-Hwa Lee, Euy-Young Jung, So-Hyun Hur
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Publication number: 20080241691Abstract: A sintered substrate is configured such that pores having a pore size (pore radius) of from 5 ?m to 7 ?m have a peak volume fraction with respect to the total pore volume of the sintered substrate, and pores having a pore radius of greater than 8.5 ?m has a volume fraction of 11% or less with respect to the total pore volume of the sintered substrate. The sintered substrate has a smaller number of large-sized pores than conventional sintered substrates and a more uniform pore size distribution, and therefore shows a sufficient strength even when the porosity is increased. In addition, a cadmium negative electrode employing the sintered substrate shows excellent gas absorption capability and therefore can reduce the internal pressure of the battery during charge.Type: ApplicationFiled: March 28, 2008Publication date: October 2, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Chihiro FUJISAWA, Atsuya FURUICHI, Kazuki SHIMOZONO, Kohei KARASUMI, Yasushiro KUDO, Makoto OCHI
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Publication number: 20080213674Abstract: The present invention provides a secondary battery using a liquid electrolyte excellent in storage characteristics. The secondary battery includes a cathode, an anode, and a liquid electrolyte, where the cathode and the anode contain at least one mutual active material. This symmetrical electrode configuration, that the at least one active material for the cathode and the anode is mutual, enables equalization of an electrode electric potential difference before charge or after discharge; and thus electrolyte degradation is efficiently restrained to improve storage characteristics.Type: ApplicationFiled: February 22, 2008Publication date: September 4, 2008Applicants: NGK Insulators, Ltd., Kyushu UniversityInventors: Shigeto Okada, Plashnitsa Larisa, Eiji Kobayashi, Yoshinori Noguchi, Takayuki Doi, Jun-ichi Yamaki, Toshihiro Yoshida, Kazuhiro Yamamoto, Hiroyuki Katsukawa
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Publication number: 20080138710Abstract: A composition for use in an electrochemical redox reaction is described. The composition may comprise a material represented by a general formula MyXO4 or AxMyXO4, where each of A (where present), M, and X independently represents at least one element, O represents oxygen, and each of x (where present) and y represent a number, and an oxide of at least one element, wherein the material and the oxide are cocrystalline, and/or wherein a volume of a crystalline structural unit of the composition is larger than a volume of a crystalline structural unit of the material alone. An electrode comprising such a composition is also described, as is an electrochemical cell comprising such an electrode. A process of preparing a composition for use in an electrochemical redox reaction is also described.Type: ApplicationFiled: November 14, 2007Publication date: June 12, 2008Inventors: Ben-Jie Liaw, Wen-Ren Liu, Sheng-Shih Chang
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Publication number: 20080118835Abstract: The rechargeable lithium battery includes a positive electrode which includes a positive active material, a negative electrode, and an electrolyte which includes a non-aqueous organic solvent and a lithium salt. The positive active material includes a core including at least one of a compound represented by Formula 1 and a compound represented by Formula 2, and a surface-treatment layer which is formed on the core and includes a compound represented by Formula 3. The lithium salt includes LiPF6 and a lithium imide-based compound. LiaNibCocMndMeO2 ??(1) LihMn2MiO4 ??(2) M?xPyOz ??(3) wherein each of M and M? is independently selected from the group consisting of an alkali metal, an alkaline-earth metal, a Group 13 element, a Group 14 element, a transition element, a rare earth element, and combinations thereof, 0.95?a?1.1, 0?b?0.999, 0?c?0.999, 0?d?0.999, 0.001?e?0.2, 0.95?h?1.1, 0.001?i?0.2, 1?y?4, 0?y?7, and 2?z?30.Type: ApplicationFiled: August 10, 2007Publication date: May 22, 2008Inventors: So-Hyun Hur, Euy-Young Jung, Duck-Chul Hwang, Yong-Chul Park, Jong-Hwa Lee, Jeom-Soo Kim, Jae-Yul Ryu, Jin-Bum Kim
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Patent number: 7285359Abstract: An object of the present invention is to provide a negative electrode for a secondary battery which has large capacity and restrains a rise in resistance inside the battery and reduction in capacity even after cycles and the secondary battery using the same. A first active material layer 2a comprising members occluding and releasing Li onto a collector 1a is formed and a second active material layer 3a as an alloy layer containing metal forming alloy with lithium or lithium and metal not-forming alloy with lithium is formed thereon. The secondary battery is constituted using the negative electrode.Type: GrantFiled: January 22, 2003Date of Patent: October 23, 2007Assignee: NEC CorporationInventors: Hironori Yamamoto, Mitsuhiro Mori, Jiro Iriyama, Mariko Miyachi, Koji Utsugi, Yutaka Bannai, Tamaki Miura, Ikiko Yamazaki
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Patent number: 7179564Abstract: A cadmium negative electrode for a nickel cadmium storage battery, the electrode comprising an electrode plate and a resin layer coating at least one surface of the electrode plate, the electrode plate comprising a cadmium compound as an active material, the resin layer comprising polyvinyl pyrrolidone and a product of an addition reaction of a styrylpyridinium salt to polyvinyl alcohol.Type: GrantFiled: November 21, 2002Date of Patent: February 20, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masayoshi Maruta, Mika Morita