Patents Examined by Laura S. Weiner
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Patent number: 10074874Abstract: A lithium ion battery that has a 5 V stabilized manganese cathode and a nonaqueous electrolyte comprising a phosphate additive is described. The lithium ion battery operates with a high voltage cathode (i.e. up to about 5 V) and has improved cycling performance at high temperature.Type: GrantFiled: March 8, 2013Date of Patent: September 11, 2018Assignee: Solvay SAInventors: Charles J. Dubois, Viacheslav A. Petrov, Mark Gerrit Roelofs
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Patent number: 10050264Abstract: A composite negative active material, and a negative electrode and a lithium secondary battery that include the composite negative active material, and a method of preparing the composite negative active material are disclosed. The composite negative active material includes: a core including a silicon material and a coating layer disposed on the core, wherein the coating layer includes a water-insoluble polymer composite in which at least one anionic component is chemically bonded to a water-soluble polymer, thereby improving lifespan characteristics of the composite negative active material.Type: GrantFiled: March 17, 2016Date of Patent: August 14, 2018Assignees: SAMSUNG ELECTRONICS CO., LTD., SAMSUNG SDI CO., LTD.Inventors: Guesung Kim, Jinsoo Mun, Heechul Jung
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Patent number: 10044029Abstract: Disclosed herein is a lithium secondary battery including a positive electrode including lithium iron phosphate and layered lithium nickel manganese cobalt oxide as a positive electrode active material and a negative electrode including a negative electrode active material having a potential difference of 3.10 V or higher from the lithium iron phosphate at a point of 50% state of charge (SOC) afforded by the entirety of the lithium iron phosphate.Type: GrantFiled: June 5, 2014Date of Patent: August 7, 2018Assignee: LG Chem, Ltd.Inventors: Won Hee Jeong, Min Sun Cho, Sin Kyu Kim, Min Hee Lee, Seung Ryul Choi, Jae Hyun Lee, Geun Chang Chung
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Patent number: 10044041Abstract: Disclosed are a binder with a core-shell structure for a secondary battery electrode, and a secondary battery including the same, wherein the core includes styrene-butadiene rubber (SBR), the shell includes a copolymer of two or more monomers selected from the group consisting of a conjugated diene-based monomer, a (meth)acrylic ester-based monomer, an acrylate-based monomer, a vinyl-based monomer, a nitrile-based monomer, and an ethylenically unsaturated carboxylic acid monomer, and the binder includes a functional group providing binding capacity to surfaces of the SBR particles. Such a binder provides excellent adhesive strength and elasticity and, thus, overall performance of a secondary battery including the same may be improved.Type: GrantFiled: May 22, 2014Date of Patent: August 7, 2018Assignee: LG Chem, Ltd.Inventors: Eun Joo Park, Min Ah Kang, Dong Jo Ryu
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Patent number: 8734989Abstract: A negative electrode for rechargeable lithium batteries includes a current collector, a porous active material layer having a metal-based active material disposed on the current collector, and a high-strength binder layer on the porous active material layer. The high-strength binder layer has a strength ranging from 5 to 70 MPa. The negative active material for a rechargeable lithium battery according to the present invention can improve cycle-life characteristics by suppressing volume expansion and reactions of an electrolyte at the electrode surface.Type: GrantFiled: November 28, 2008Date of Patent: May 27, 2014Assignee: Samsung SDI Co., Ltd.Inventors: Sang-Min Lee, Nam-Soon Choi, Goo-Jin Jeong, Yong-Mook Kang, Min-Seok Sung, Wan-Uk Choi, Sung-Soo Kim
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Patent number: 8524394Abstract: Negative active materials, negative electrodes, and rechargeable lithium batteries are provided. A negative electrode according to one embodiment includes a non-carbon-based active material, a lithium salt having an oxalatoborate structure, and a high-strength polymer binder. The negative active material may include a non-carbon-based material and a coating layer on the non-carbon-based material. The coating layer includes a lithium salt having an oxalatoborate structure and a high-strength polymer binder. A rechargeable lithium battery including the negative electrode or negative active material has good cycle life characteristics and high capacity.Type: GrantFiled: July 29, 2008Date of Patent: September 3, 2013Assignee: Samsung SDI Co., Ltd.Inventors: Nam-Soon Choi, Kyoung-Han Ryu, Su-Yeong Park, Doo-Kyoung Lee, Sang-Min Lee, Wan-Uk Choi
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Patent number: 8148007Abstract: An organic electrolyte solution includes a lithium salt; an organic solvent including a high permittivity solvent and a low boiling solvent; and a vinyl-based compound represented by Formula 1 below, wherein m and n are each independently integers of 1 to 10; X1, X2, and X3 each independently represent O, S, or NR9; and R1, R2, R3, R4, R5, R6, R7, R8, and R9 are represented in the detailed description. The organic electrolyte solution of the present invention and a lithium battery using the same suppress degradation of an electrolyte, providing improved cycle properties and life span thereof.Type: GrantFiled: June 27, 2008Date of Patent: April 3, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Seok-soo Lee, Young-gyonn Ryu, Seung-sik Hwang, Dong-joon Lee, Boris A. Trofimov
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Patent number: 8119283Abstract: The present invention relates to negative active materials for rechargeable lithium batteries, manufacturing methods thereof, and rechargeable lithium batteries including the negative active materials. A negative active material for a rechargeable lithium battery includes a core including a material capable of carrying out reversible oxidation and reduction reactions and a coating layer formed on the core. The coating layer has a reticular structure.Type: GrantFiled: October 31, 2006Date of Patent: February 21, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Nam-Soon Choi, Sung-Soo Kim, Yong-Mook Kang, Kyoung-Han Yew
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Patent number: 8048573Abstract: Organic electrolytic solutions and lithium batteries using the organic electrolytic solutions are provided. One organic electrolytic solution includes a lithium salt, a mixed organic solvent consisting of a high-dielectric constant solvent and a low-boiling point solvent, and a compound represented by Formula 1 or 2 as an additive. The organic electrolytic solution and the lithium battery using the organic electrolytic solution may inhibit the reductive cleavage reaction of a polar solvent, thereby increasing capacity retention of the battery, and improving charge-discharge efficiency and battery lifetime.Type: GrantFiled: January 12, 2007Date of Patent: November 1, 2011Assignee: Samsung SDI Co., Ltd.Inventors: Seok-soo Lee, Young-gyoon Ryu, Han-su Kim
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Patent number: 8007953Abstract: To provide a membrane/electrode assembly for polymer electrolyte fuel cells capable of obtaining a high output voltage even in a high current density region, by providing electrodes having good gas diffusion properties, conductivity, water repellency and durability. A membrane/electrode assembly for polymer electrolyte fuel cells, comprising; an anode and a cathode each having a catalyst layer containing a catalyst and having a gas diffusion layer; and a polymer electrolyte membrane disposed between the catalyst layer of the anode and the catalyst layer of the cathode, characterized in that at least one of the above anode and cathode, has a carbon layer containing a fluorinated ion exchange resin and carbon nanofibers having a fiber diameter of from 1 to 1,000 nm and a fiber length of at most 1,000 ?m, disposed between the catalyst layer and the gas diffusion layer.Type: GrantFiled: April 28, 2008Date of Patent: August 30, 2011Assignees: Asahi Glass Company, Limited, Panasonic CorporationInventor: Toshihiro Tanuma
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Patent number: 8003252Abstract: 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: GrantFiled: May 22, 2007Date of Patent: August 23, 2011Assignee: Samsung SDI Co., Ltd.Inventors: 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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Patent number: 8003257Abstract: The invention relates to an anode for lithium secondary battery comprising vapor grown carbon fiber uniformly dispersed without forming an agglomerate of 10 ?m or larger in an anode active material using natural graphite or artificial graphite, which anode is excellent in long cycle life and large current characteristics. Composition used for production for the anode can be produced, for example, by mixing a thickening agent solution containing an anode active material, a thickening agent aqueous solution and styrene butadiene rubber as binder with a composition containing carbon fiber dispersed in a thickening agent with a predetermined viscosity or by mixing an anode active material with vapor grown carbon fiber in dry state and then adding polyvinylidene difluoride thereto.Type: GrantFiled: July 3, 2006Date of Patent: August 23, 2011Assignee: Showa Denko K.K.Inventors: Masataka Takeuchi, Chiaki Sotowa
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Patent number: 7989109Abstract: An organic electrolytic solution for a lithium primary or secondary battery includes a lithium salt; an organic solvent; a radical initiator represented by Formula 1 below; and a polymerizable monomer represented by Formula 2 below: R1—N2+X???<Formula 1> wherein R1, R2, R3, R4, and X? are described herein. The organic electrolytic solution improves charge-discharge efficiency and increases cell capacity of the lithium primary or secondary battery.Type: GrantFiled: April 15, 2008Date of Patent: August 2, 2011Assignee: Samsung SDI Co., Ltd.Inventors: Seok-soo Lee, Young-gyoon Ryu, Dong-joon Lee, Seung-sik Hwang
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Patent number: 7985502Abstract: The present invention provides a lithium secondary battery having excellent battery characteristics such as battery cycling property, electrical capacity and storage property. The present invention relates to a nonaqueous electrolytic solution for lithium secondary batteries in which an electrolyte salt is dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution comprising a formic ester compound having a specific structure in an amount of 0.01 to 10% by weight of the nonaqueous electrolytic solution, and a lithium secondary battery using the same.Type: GrantFiled: March 18, 2005Date of Patent: July 26, 2011Assignee: Ube Industries, Ltd.Inventors: Koji Abe, Kazuhiro Miyoshi, Takaaki Kuwata
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Patent number: 7981546Abstract: A lithium-containing composite oxide represented by the formula 1: LixNi1-y-z-v-wCoyAlzM1vM2wO2 is used as a positive electrode active material for a non-aqueous electrolyte secondary battery. The element M1 is at least one selected from the group consisting of Mn, Ti, Y, Nb, Mo, and W. The element M2 includes at least two selected from the group consisting of Mg, Ca, Sr, and Ba, and the element M2 includes at least Mg and Ca. The formula 1 satisfies 0.97?x?1.1, 0.05?y?0.35, 0.005?z?0.1, 0.0001?v?0.05, and 0.0001?w?0.05. The primary particles have a mean particle size of 0.1 ?m or more and 3 ?m or less, and the secondary particles have a mean particle size of 8 ?m or more and 20 ?m or less.Type: GrantFiled: April 17, 2006Date of Patent: July 19, 2011Assignees: Panasonic Corporation, Sumitomo Metal Mining Co., Ltd.Inventors: Takashi Takeuchi, Akihiro Taniguchi, Shuji Tsutsumi, Kensuke Nakura, Hiroshi Matsuno, Hideo Sasaoka, Satoshi Matsumoto
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Patent number: 7981553Abstract: A nonaqueous electrolyte which contains a nonaqueous organic solvent and a lithium salt dissolved therein is provided. Also provided is a lithium secondary battery employing the nonaqueous electrolyte.Type: GrantFiled: May 17, 2010Date of Patent: July 19, 2011Assignee: Mitsubishi Chemical CorporationInventor: Masamichi Onuki
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Patent number: 7967874Abstract: A non-aqueous electrolyte secondary battery having a positive electrode and a negative electrode with an active material capable of absorbing and desorbing lithium, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. The negative electrode active material is covered by a coating having elasticity. The fully elastic coating expands and contracts following the volume change of the negative electrode active material; thus, the coating brings out its desired functions without being damaged or broken. Regardless of the degree of the volume change of the negative electrode active material, a lasting coating without damage is formed on the negative electrode active material, to improve performances of the non-aqueous electrolyte secondary battery.Type: GrantFiled: October 15, 2009Date of Patent: June 28, 2011Assignee: Panasonic CorporationInventors: Tetsuo Nanno, Tomohiro Ueda
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Patent number: 7968234Abstract: An electrolyte for a lithium secondary battery includes lithium salts, a non-aqueous organic solvent, and additive compounds, which initiates decomposition at 4V to 5V and show a constant current maintenance plateau region of more than or equal to 0.5V at measurement of LSV (linear sweep voltammetry). The additive compounds added to the electrolyte of the present invention decompose earlier than the organic solvent to form a conductive polymer layer on the surface of a positive electrode by increased electrochemical energy and heat at overcharge. The conductive polymer layer prevents decomposition of the organic solvent. Accordingly, the electrolyte inhibits gas generation caused by decomposition of the organic solvent during high temperature storage, and also improves safety of the battery during overcharge.Type: GrantFiled: May 18, 2010Date of Patent: June 28, 2011Assignees: Samsung SDI Co., Ltd., Cheil Industries Inc.Inventors: Jin-Hee Kim, Jin-Sung Kim, Sang-Moon Hwang, Meen-Seon Paik, Hak-Soo Kim
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Patent number: 7955735Abstract: A non-aqueous electrolyte secondary battery that has a high electrical capacity and exhibits excellent cycle characteristics even when the battery is rapidly charged and discharged at a large current includes: a positive electrode capable of reversibly absorbing and desorbing Li; a negative electrode; and a non-aqueous electrolyte. The negative electrode includes an alloying material that is capable of electrochemically absorbing and desorbing Li, and includes an A phase composed mainly of Si and a B phase including an intermetallic compound of at least one transition metal element and Si. The transition metal element is selected from the group consisting of Ti, Zr, Ni, Cu, and Fe. The A phase and/or the B phase includes a microcrystalline or amorphous region. The weight percent of the A phase relative to the total weight of the A phase and the B phase is greater than 40% and not greater than 95%.Type: GrantFiled: July 6, 2005Date of Patent: June 7, 2011Assignee: Panasonic CorporationInventors: Yasuhiko Bito, Toshitada Sato, Teruaki Yamamoto
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Patent number: RE42433Abstract: A positive active material for a rechargeable lithium battery is provided. The positive active material includes at least one compound selected from the group consisting of lithiated compounds, a metal oxide layer formed on a surface of the compound and metal oxide masses adhered on the metal oxide layer. The positive active material is produced by coating a compound with a metal alkoxide solution, an organic solution of a metal salt or an aqueous solution of a metal salt and heat-treating the coated compound. The compound is selected from the group consisting of lithiated compounds. Thereafter, the heat-treated compound is slow-cooled to 100 to 500° C. and the cooled compound is quenched to room temperature.Type: GrantFiled: September 10, 2010Date of Patent: June 7, 2011Assignee: Samsung SDI Co., Ltd.Inventors: Ho-Jin Kweon, Jung-Joon Park, Jeong-Soon Shin, Kyeong-Min Jeong