And Acyclic Ether Solvent Patents (Class 429/333)
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Publication number: 20110008681Abstract: There is provided an electrolytic solution causing no phase separation even at low temperatures, being excellent in flame retardancy and noncombustibility, assuring high solubility of an electrolyte salt, having a high discharge capacity, being excellent in charge-discharge cycle characteristics and being suitable for electrochemical devices such as lithium ion secondary batteries.Type: ApplicationFiled: September 12, 2008Publication date: January 13, 2011Inventors: Meiten Koh, Hitomi Nakazawa, Hideo Sakata, Michiru Tanaka, Akiyoshi Yamauchi, Aoi Nakazono
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Patent number: 7858241Abstract: A nonaqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same are provided. In particular, the nonaqueous electrolyte comprises a compound of chemical formula 1 as an electrolyte additive: NC—(R1)n-A-(R2)m—CN??1 wherein, R1 and R2 represent, respectively, alkylene groups, n and m represent integers of 1 to 10, and A is an aromatic hydrocarbon in which the number of carbons is 5 to 9 or O. When the lithium secondary battery is kept at high voltage and temperature, the electrolyte additive reduces gas generation, thereby reducing battery swelling. Therefore, it is possible to reduce a battery thickness increment rate and to increase discharge capacity at a high temperature.Type: GrantFiled: June 12, 2008Date of Patent: December 28, 2010Assignee: Samsung SDI Co., Ltd.Inventors: Jinsung Kim, Jinbum Kim, Narae Park
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Publication number: 20100310908Abstract: The present disclosure relates generally to a high capacity cathode material suitable for use in a non-aqueous electrochemical cell that comprises a mixture of at least three different cathode materials, and more specifically a mixture of fluorinated carbon, an oxide of copper and an oxide of manganese. The present disclosure additionally relates to a non-aqueous electrochemical cell comprising such a cathode material and, in particular, to such a non-aqueous electrochemical cell that can deliver a higher capacity than a conventional cell, and/or that possesses an improved end-of-life indication.Type: ApplicationFiled: March 17, 2010Publication date: December 9, 2010Applicant: EAGLEPICHER TECHNOLOGIES, LLCInventors: Dong Zhang, Ernest Ndzebet, Min Qi Yang, Viet Vu, Umamaheswari Janakiraman, Mario Destephen
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Patent number: 7749288Abstract: A method of making a lithium electrochemical cell includes treating the cathode active material with an agent that includes lithium but not sodium. A cathode including the cathode active material, an anode, a separator, and an electrolyte are assembled in a housing to provide a cell containing less than 1500 ppm by weight of sodium.Type: GrantFiled: June 18, 2009Date of Patent: July 6, 2010Assignee: The Gillette CompanyInventors: William L. Bowden, Nikolai N. Issaev, Michael Pozin
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Publication number: 20100124708Abstract: A non-aqueous electrolyte is provided that includes a non-aqueous solvent and an electrolyte salt, wherein the non-aqueous solvent contains a fluorinated ether (1) represented by the following Formula: HCF2CF2CF2CH2—O—CF2CF2H (1). This non-aqueous electrolyte has good wettability to a polyolefin separator, can provide a battery with excellent load characteristics for a long period, does not easily decompose in the battery under high-temperature storage, and causes little gas generation due to decomposition. Furthermore, a non-aqueous electrolyte secondary battery is provided that includes a positive electrode, a negative electrode, a separator, and the above-described non-aqueous electrolyte.Type: ApplicationFiled: November 16, 2009Publication date: May 20, 2010Inventors: Tooru Matsui, Tetsuo Nanno
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Patent number: 7700242Abstract: This invention discloses a type of mixed additives for electrolyte of lithium-ion secondary batteries, having the following characteristics: in weight percentage: biphenyl series: 0.5% to 95.4%; cyclohexylbenzene series: 1.1% to 93.8%; vinylene carbonate: 0.4% to 93.2%; phenyl vinyl sulfone: 0.5% to 96.5%; ethenyl sulfonyl benzene: 0.5% to 95.8%. This invention also discloses an electrolyte for lithium-ion secondary batteries comprising organic solvents and lithium saline, wherein the special characteristic is that it comprises 2% to 20% weight percentage of said mixed additives. The distinctive advantage of the mixed additives for lithium-ion secondary batteries of this invention is to effectively enhance the overcharging, low-temperature, and cycle properties of lithium-ion batteries. A lithium-ion battery having the mixed additives of this invention remains explosion-free, ignition-free and reliably safe when the lithium-ion secondary battery is overcharging.Type: GrantFiled: October 18, 2006Date of Patent: April 20, 2010Assignee: BYD Company LimitedInventors: Feng Xiao, Mingxia Wang, Guishu Zhou, Huaying You
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Patent number: 7691537Abstract: An electrolyte for a lithium secondary battery and a lithium secondary battery having the electrolyte, the electrolyte including a lithium salt; a non-aqueous organic solvent including ?-butyrolactone; and succinic anhydride.Type: GrantFiled: July 7, 2006Date of Patent: April 6, 2010Assignee: Samsung SDI Co., Ltd.Inventor: Cheonsoo Kim
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Patent number: 7682754Abstract: 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: GrantFiled: May 26, 2005Date of Patent: March 23, 2010Assignee: Novolyte Technologies, Inc.Inventors: Wu Xu, Zhongyi Deng, Vaikunth S. Prabhu, Pascal Bolomey
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Patent number: 7629085Abstract: A nonaqueous electrolytic solution for a lithium secondary battery, in which 0.01 to 10 wt. % of a sulfur-containing acid ester and 0.01 to 10 wt. % of a triple bond-containing compound are dissolved in a nonaqueous solvent, and a lithium secondary battery employing the nonaqueous electrolytic solution.Type: GrantFiled: May 30, 2005Date of Patent: December 8, 2009Assignee: Ube Industries, Ltd.Inventors: Koji Abe, Kazuhiro Miyoshi, Takaaki Kuwata
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Patent number: 7615316Abstract: In order to manufacture a lithium secondary battery having excellent performances in safety under overcharge condition, cycle property, electric capacity, and storage endurance, 0.1 wt. % to 10 wt. % of a tert-alkylbenzene compound is favorably incorporated into a non-aqueous electrolytic solution comprising a non-aqueous solvent and an electrolyte, preferably in combination with 0.1 wt. % to 1.5 wt. % of a biphenyl compound.Type: GrantFiled: October 24, 2007Date of Patent: November 10, 2009Assignee: UBE Industries, Ltd.Inventors: Koji Abe, Yasuo Matsumori, Akira Ueki
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Patent number: 7592102Abstract: An electrolyte for a lithium ion secondary battery includes a non-aqueous organic solvent; lithium salt; and difluoro oxalato borate and fluoro ethylene carbonate (FEC). The capacity retention property and durability of a lithium ion secondary battery including the electrolyte is excellent even when the battery is left at a high temperature.Type: GrantFiled: October 23, 2008Date of Patent: September 22, 2009Assignee: Samsung SDI Co., Ltd.Inventors: Jinsung Kim, Narae Park, Jinhyunk Lim, Suhee Han, Jinburn Kim, Jungkang Oh
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Patent number: 7575831Abstract: A method for preparing Li1+xNi1?yCoyO2 cathode materials is disclosed, wherein ?0.2?x?0.2 and 0.05?y?0.5. The method includes the following steps: (A) adding a first solution into a second solution to form a mixed solution, wherein the first solution is a saturated lithium hydroxide solution, the second solution contains nickel salt and cobalt salt, the mole ratio of the lithium ion in the first solution to nickel ion and cobalt ion in the second solution ranges from 1.5:1 to 5:1, and the molar ratio of nickel ion to cobalt ion in the second solution is 1?y:y; (B) stirring the mixed solution; (C) filtering the mixed solution and obtaining a co-precipitated precursor, wherein the molar ratio of lithium ion:nickel ion:cobalt ion is 1+x:1?y:y; and (D) heating the co-precipitated precursor at a temperature higher than 600° C.Type: GrantFiled: November 3, 2005Date of Patent: August 18, 2009Assignee: Tatung CompanyInventors: She-Huang Wu, Wen-Jen Liu, ChihWei Yang
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Patent number: 7524581Abstract: Electrochemical cells are disclosed. In some embodiments, an electrochemical cell includes a cathode having less than about 2,000 ppm of water, an anode, and an electrolyte having a first lithium salt and LiPF6.Type: GrantFiled: October 19, 2007Date of Patent: April 28, 2009Assignee: The Gillette CompanyInventors: Nikolai N. Issaev, Michael Pozin
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Patent number: 7510808Abstract: The invention is a 1.5 volt primary electrochemical battery cell with an alkali metal lithium negative electrode (such as lithium), a positive electrode (comprising iron disulfide for example) and a nonaqueous electrolyte. The electrolyte has a solute including lithium iodide dissolved in an ether-containing solvent including a 1,2-dimethoxypropane based solvent component and no more than 30 volume percent 1,2-dimethoxyethane. When 1,2-dimethoxypropane is used to replace at least most 1,2-dimethoxyethane in the solvent, the cell provides good discharge capacity at low temperature while maintaining excellent discharge capacity at room temperature.Type: GrantFiled: August 27, 2004Date of Patent: March 31, 2009Assignee: Eveready Battery Company, Inc.Inventor: Andrew Webber
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Publication number: 20090068565Abstract: The rechargeable lithium battery includes: a negative electrode including a non-carbon-based negative active material; a positive electrode including a positive active material that reversibly intercalates and deintercalates lithium ions; and an electrolyte that includes a non-aqueous organic solvent that includes ethylene carbonate in an amount of 20 volume % or less, a lithium salt including LiPF6, a first additive represented by the following Formula 1 and a second additive that is LiB(C2O4)2. The electrolyte has a viscosity of 3.02 cP or less: wherein, R1 and R2 are independently selected from the group consisting of hydrogen, a halogen, a cyano (CN), a nitro (NO2), and a C1 to C5 fluoroalkyl, provided that at least one of R1 and R2 is selected from the group consisting of a halogen, a cyano (CN), a nitro (NO2), and a C1 to C5 fluoroalkyl.Type: ApplicationFiled: September 11, 2008Publication date: March 12, 2009Applicant: SAMSUNG SDI CO., LTD.Inventor: Doo-Kyoung LEE
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Publication number: 20090017386Abstract: Non-aqueous electrolyte solutions capable of protecting negative electrode materials such as lithium metal and carbonaceous materials in energy storage electrochemical cells (e.g., lithium metal batteries, lithium ion batteries and supercapacitors) include an electrolyte salt, a non-aqueous electrolyte solvent mixture, an unsaturated organic compound 4-methylene-1,3-dioxolan-2-one or 4,5-dimethylene-1,3-dioxolan-2-one, and other optional additives. The 1,3-dioxolan-2-ones help to form a good solid electrolyte interface on the negative electrode surface.Type: ApplicationFiled: July 11, 2007Publication date: January 15, 2009Applicant: FERRO CORPORATIONInventors: Wu Xu, Pascal Bolomey, Martin W. Payne
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Publication number: 20080292971Abstract: A battery capable of improving high-temperature characteristics is provided. The battery includes a cathode, an anode and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. A solvent of the electrolytic solution includes a main solvent such as a cyclic carbonate which includes halogen and a sub solvent such as carbonate dimer.Type: ApplicationFiled: May 20, 2008Publication date: November 27, 2008Applicant: SONY CORPORATIONInventors: Masayuki Ihara, Kiyohiko Suzuki, Akinori Kita, Tadahiko Kubota
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Publication number: 20080160418Abstract: A nonaqueous electrolyte having maleimide additives and rechargeable cells employing the same are provided. The nonaqueous electrolyte having maleimide additives comprises an alkali metal electrolyte, a nonaqueous solvent, and maleimide additives. Specifically, the maleimide additives comprise maleimide monomer, bismaleimide monomer, bismaleimide oligomer, or mixtures thereof. The maleimide additives comprise functional groups, such as a maleimide double bond, phenyl group carboxyl, or imide, enhancing the charge-discharge efficiency, safety, thermal stability, chemical stability, flame-resistance, and lifespan of the secondary cells of the invention.Type: ApplicationFiled: December 27, 2007Publication date: July 3, 2008Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jing-Pin Pan, Chang-Rung Yang, Tsung-Hsiung Wang, Yueh-Wei Lin, Pin-Chi Chiang, Jung-Mu Hsu
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Publication number: 20080160419Abstract: Electrolyte solutions for an electrochemical energy device, including a lithium secondary battery, comprising (a) a supporting electrolyte salt and (b) a solvent composition comprising (1) at least one of a cyclic carbonic acid ester solvent and (2) at least one fluorine-containing solvent having a boiling point of at least 80° C.Type: ApplicationFiled: February 3, 2006Publication date: July 3, 2008Inventors: Haruki Segawa, William M. Lamanna, Michael G. Costello
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Patent number: 7384708Abstract: A non-aqueous electrolyte battery of the present invention includes a non-aqueous electrolyte containing a lithium salt, a cyclic sultone derivative, and an acid anhydride, wherein the non-aqueous electrolyte contains the cyclic sultone derivative in an amount of 0.3 to 3% by mass and the non-aqueous electrolyte contains the acid anhydride in an amount of 0.3 to 3% by mass. Furthermore, the non-aqueous electrolyte battery includes at least one selected from a cyclic sultone derivative and an acid anhydride, and an electrolyte salt. The electrolyte salt contains lithium salt A and lithium salt B. The lithium salt A is at least one selected from LiBF4, LiPF6, LiAsF6, and LiSbF6, and the lithium salt B is a lithium salt other than the lithium salt A. The electrolyte contains the lithium salt A in an amount of 2 mol % or more.Type: GrantFiled: January 13, 2006Date of Patent: June 10, 2008Assignee: Hitachi Maxell, Ltd.Inventors: Tetsuo Kawai, Atsushi Yamano, Noriyuki Yabushita, Tadashi Sakata, Hideki Nishihama
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Patent number: 7358010Abstract: A novel cathode composition for use in a metal/fluorinated carbon battery is produced by mixing fluorinated carbons made from anisotropic and isotropic carbon, where the anisotropic carbon is carbon fiber and the isotropic carbon is graphite. This cathode composition has higher specific capacity and higher discharge rate capability than commonly used industrial products made using fluorinated petroleum cokes or similar materials. In addition this composition undergoes much less swelling (increase in volume) during discharge when compared with the commonly used fluorinated carbon.Type: GrantFiled: June 20, 2003Date of Patent: April 15, 2008Assignee: LODESTAR Inc.Inventors: Geliard Mikhailovich Korshunov, Natalya Vladimirovna Polyakova, Vladimir Alexandrovich Vulf, Vladimir Yuryevich Zakharov
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Patent number: 7300723Abstract: The present invention provides a cell that does not impair heat resistant safety and electrochemical characteristics such as a discharge characteristic, and enhances long-period reliability. In the cell of the present invention, a nonaqueous solvent has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of 200° C. or higher, and has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of lower than 200° C.; and the total volume ratio at 23° C. of the compounds represented by the following general formula (1) is 95 to 100 percent of the nonaqueous solvent, X—(O—C2H4)n-O—Y??(1) (where X and Y are independently an alkyl group (number of carbons: 1-4), and n is 1-5).Type: GrantFiled: February 26, 2004Date of Patent: November 27, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Satoru Fukuoka, Seiji Morita, Nobuhiro Nishiguchi, Satoru Naruse, Masayuki Muraki, Masahiro Imanishi
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Patent number: 7294436Abstract: In order to manufacture a lithium secondary battery having excellent performances in safety under overcharge condition, cycle property, electric capacity, and storage endurance, 0.1 wt. % to 10 wt. % of a tert-alkylbenzene compound is favorably incorporated into a non-aqueous electrolytic solution comprising a non-aqueous solvent and an electrolyte, preferably in combination with 0.1 wt. % to 1.5 wt. % of a biphenyl compound.Type: GrantFiled: January 24, 2002Date of Patent: November 13, 2007Assignee: Ube Industries, Ltd.Inventors: Koji Abe, Yasuo Matsumori
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Patent number: 7285356Abstract: Electrochemical cells are disclosed. In some embodiments, an electrochemical cell includes a cathode having less than about 2,000 ppm of water, an anode, and an electrolyte having a first lithium salt and LiPF6.Type: GrantFiled: July 23, 2004Date of Patent: October 23, 2007Assignee: The Gillette CompanyInventors: Nikolai N. Issaev, Michael Pozin
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Patent number: 7226704Abstract: Electrolytes containing lithium-bis(oxalato)borate, a cyclic carbonate, one or more compounds selected from acrylic carbonates, aliphatic esters, alicyclic ethers and aliphatic, difunctional ethers, one or more compounds selected from lactones, dinitriles, compounds that contain at least one carboxylic acid ester group and an ether group, compounds that contain at least one carbonic acid group and an ether group, compounds that contain at least one nitrile group and an ether group, trialkyl phosphoric acid esters and trialkyl boric acids.Type: GrantFiled: March 5, 2002Date of Patent: June 5, 2007Assignee: Chemetall GmbHInventors: Jan-Christoph Panitz, Ulrich Wietelmann, Markus Scholl
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Patent number: 7105254Abstract: A polymer electrolyte providing lithium secondary batteries in which growth of lithium dendrites is suppressed and batteries exhibiting excellent discharge characteristics in low to high temperature, comprising a polymer gel holding a nonaqueous solvent containing an electrolyte, wherein the polymer gel comprises (I) a unit derived from at least one monomer having one copolymerizable vinyl group and (II) a unit derived from at least one compound selected from the group consisting of (II-a) a compound having two acryloyl groups and a (poly)oxyethylene group, (II-b) a compound having one acryloyl group and a (poly)oxyethylene group, and (II-c) a glycidyl ether compound, particularly the polymer gel comprises monomer (I), compound (II-a), and a copolymerizable plasticizing compound.Type: GrantFiled: August 26, 2002Date of Patent: September 12, 2006Inventor: Noboru Oyama
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Patent number: 7087349Abstract: An organic electrolytic solution and a lithium secondary battery employing the same, wherein the organic electrolytic solution for a lithium secondary battery includes a polymer adsorbent having an ethylene oxide chain capable of being adsorbed into a lithium metal, a material capable of reacting with lithium to form a lithium alloy, a lithium salt, and an organic solvent. The organic electrolytic solution may be applied to all types of batteries including lithium ion batteries, lithium polymer batteries and lithium metal polymer batteries using a lithium metal for a negative electrode material, and the like. In particular, when the organic electrolytic solution is utilized in a lithium metal polymer battery, it serves to stabilize the lithium metal, and to increase the lithium ionic conductivity, thereby improving the cycle characteristics and charging/discharging efficiency of the battery.Type: GrantFiled: October 30, 2002Date of Patent: August 8, 2006Assignee: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Do-young Seung, Young-gyoon Ryu
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Patent number: 7033707Abstract: A lithium electrochemical cell of either a primary or a secondary chemistry activated with an electrolyte having a cyclic carbonate of a ring size equal to or larger than a six-member ring is described. The cyclic carbonate helps to make the anode passivation film ionically conductive to thereby eliminate voltage delay during pulse discharge and to reduce Rdc. Such a cell is particularly well suited for powering an implantable medical device, such as a cardiac defibrillator.Type: GrantFiled: February 19, 2003Date of Patent: April 25, 2006Assignee: Wilson Greatbatch Technologies, Inc.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6844115Abstract: The present invention is directed to at least partially replacing PC and/or DME with a linear carbonate, preferably dimethyl carbonate, and a linear mono-ether, the most preferred being diisopropyl ether, in electrolytes useful for activating alkali metal-containing cells. This electrolyte has improved conductivity and provides electrochemical cells with enhanced discharge performance. A most preferred electrolyte comprises 1,2-dimethoxyethane, propylene carbonate, dimethyl carbonate and diisopropyl ether.Type: GrantFiled: November 4, 2002Date of Patent: January 18, 2005Assignee: Wilson Greatbatch Technologies, Inc.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6841300Abstract: An electrolyte containing calcium bistrifluoromethanesulfonimide [Ca((CF3SO2)2N)2] for a nonaqueous battery. The calcium bistrifluoromethanesulfonimide is soluble in an organic solvent and a molten salt having a melting point of not greater than 60° C.Type: GrantFiled: December 18, 2003Date of Patent: January 11, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Masaharu Itaya, Masahide Miyake, Masahisa Fujimoto
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Patent number: 6824928Abstract: The object of the present invention is to supply organic borates highly soluble even in a solvent of a low dielectric constant; nonaqueous electrolytes made from these organic borates and excellent in characteristics; lithium secondary batteries with improved high-temperature storage characteristics; electric appliances that can be free of protection circuits, and; various applications of the electric appliances. The present invention relates to: organic borate compounds represented by structural formula (1) where X denotes lithium or quaternary ammonium or quaternary phosphonium and R1, R2, R3, and R4 each denote an independent halogen-atom displacement alkyl group whose carbon number ranges from 1 to 4, and organic borate compounds whose R1, R2, R3, and R4 are represented by trifluoromethyl groups or pentafluoroethyl groups, in particular, can be easily dissolved to concentrations of at least 0.Type: GrantFiled: August 15, 2003Date of Patent: November 30, 2004Assignees: Hitachi, Ltd., Kanto Kagaku Kabushiki KaishaInventors: Juichi Arai, Hideaki Katayama, Mitsuru Kobayashi, Hiroyuki Yamaguchi, Hideki Takahashi, Masaru Kato
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Publication number: 20040202936Abstract: Disclosed is an electrochemical cell comprising a lithium anode and a sulfur-containing cathode and a non-aqueous electrolyte solvent. In the fully charged state of the cell the concentration of lithium ions is preferably less than 0.3 M. The cell delivers high discharge capacity at discharge rates, for example, C/5, over temperatures ranges of from +25° C. to −20° C. Also disclosed is a battery including an electrochemical cell according to the invention and a device that utilizes such a battery to derive power.Type: ApplicationFiled: April 10, 2003Publication date: October 14, 2004Applicant: Moltech CorporationInventor: Yuriy V. Mikhaylik
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Publication number: 20040170904Abstract: The present invention provides a cell that does not impair heat resistant safety and electrochemical characteristics such as a discharge characteristic, and enhances long-period reliability. In the cell of the present invention, a nonaqueous solvent has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of 200° C. or higher, and has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of lower than 200° C.; and the total volume ratio at 23° C.Type: ApplicationFiled: February 27, 2004Publication date: September 2, 2004Inventors: Satoru Fukuoka, Seiji Morita, Nobuhiro Nishiguchi, Satoru Naruse, Masayuki Muraki, Masahiro Imanishi
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Patent number: 6783888Abstract: The minimization or elimination of swelling in lithium cells containing CFx as part of the cathode electrode and discharged under high rate applications is described. When CFx materials are synthesized from fibrous carbonaceous materials, in comparison to petroleum coke, cell swelling is greatly reduced, and in some cases eliminated. Preferred precursors are carbon fibers and MCMB.Type: GrantFiled: May 17, 2001Date of Patent: August 31, 2004Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Sally Ann Smesko, Esther S. Takeuchi, Steven M. Davis
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Publication number: 20040142247Abstract: A lithium secondary battery including a positive electrode, a negative electrode and a nonaqueous electrolyte containing a solute dissolved in a nonaqueous solvent, wherein a lithium-aluminum-manganese alloy in which lithium is occluded in an aluminum-manganese alloy is a material of the negative electrode, and the nonaqueous electrolyte contains a mixed solvent of a cyclic carbonate and a polyethylene glycol dialkyl ether as the nonaqueous solvent.Type: ApplicationFiled: January 14, 2004Publication date: July 22, 2004Inventors: Seiji Yoshimura, Naoki Imachi, Keiji Saishou, Masanobu Takeuchi
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Publication number: 20040121239Abstract: In order to manufacture a lithium secondary battery having excellent performances in safety under overcharge condition, cycle property, electric capacity, and storage endurance, 0.1 wt. % to 10 wt. % of a tert-alkylbenzene compound is favorably incorporated into a non-aqueous electrolytic solution comprising a non-aqueous solvent and an electrolyte, preferably in combination with 0.1 wt. % to 1.5 wt. % of a biphenyl compound.Type: ApplicationFiled: July 23, 2003Publication date: June 24, 2004Inventors: Koji Abe, Yasuo Matsumori, Akira Ueki
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Publication number: 20040076887Abstract: The invention relates to electrolytes, containing lithium-bis(oxalato)borate, a cyclic carbonate, one or more compounds selected from acyclic carbonates, aliphatic esters, alicyclic ethers and aliphatic, difunctional ethers, one or more compounds selected from lactones, dimitriles, compounds that contain at least one carboxylic acid seter group and an ether group, compounds that contain at least one carbonic acid group and an ether group, compounds that contain at least one nitrile group and an ether group, trialkyl phosphoric acid esters and trialkyl boric acids.Type: ApplicationFiled: October 9, 2003Publication date: April 22, 2004Inventors: Jan-Christoph Panitz, Ulrich Wietelmann, Markus Scholl
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Publication number: 20040038130Abstract: A lithium secondary battery including a positive electrode which is capable of occluding and releasing lithium, a negative electrode which is capable of occluding and releasing lithium, a separator between the positive electrode and the negative electrode, and a nonaqueous electrolyte comprising a nonaqueous solvent and a wettability improving agent. The nonaqueous solvent does not substantially wet the separator, and the wettability improving agent is dissolved in the nonaqueous solvent, improves the wettability of the nonaqueous solvent to the separator, and has an oxidative decomposition potential in a range of 4.5 V to 6.2 V.Type: ApplicationFiled: August 25, 2003Publication date: February 26, 2004Inventors: Naoki Imachi, Seiji Yoshimura
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Patent number: 6696202Abstract: A lithium secondary battery comprising a negative electrode, a positive electrode, a separator and a non-aqueous liquid electrolyte, the non-aqueous liquid electrolyte having an electrical conductivity of 0.05 mS/cm or more and no such a flash point as specified by JIS-K2265 flash point test and comprising an ion nonconductive solvent and a lithium ion conductive solvent, is non-flammable and safe even at high temperatures.Type: GrantFiled: March 6, 2001Date of Patent: February 24, 2004Assignee: Hitachi, Ltd.Inventor: Juichi Arai
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Patent number: 6682856Abstract: A non-aqueous electrolyte secondary battery which comprises a positive electrode containing a lithium-containing oxide; a negative electrode containing a material capable of absorbing and releasing lithium; and a non-aqueous electrolyte containing a non-aqueous solvent containing at least one non-cyclic ester and which is excellent in storage stability at high temperatures is provided by adding an oxidation resistance improving agent such as triphenylmethane, tetraphehylmethane or the like.Type: GrantFiled: October 18, 2001Date of Patent: January 27, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shoichiro Watanabe, Kazuya Iwamoto, Atsushi Ueda, Jun Nunome, Hizuru Koshina
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Patent number: 6680149Abstract: The present invention relates to a solid polymer electrolyte of polyether poly(N-substituted urethane) comprising an electrolytic compound and a polymer matrix, wherein the polymer matrix is a copolymer comprising polyether unit and polyurethane unit and has 50,000-2,000,000 of a weight average molecular weight, where N-positions of the polyurethane unit are substituted with oligo(ethylene oxide) derivatives which provide flexibility and electrolytic conduction of the polymer matrix by controlling its length, composition, structure and crosslinked degree. Accordingly, the solid polymer electrolyte of the present invention provides excellent thermal stability, electrochemical stability and mechanical properties and thus, is suitable for use in polymer secondary batteries and electrochemical devices.Type: GrantFiled: October 1, 2001Date of Patent: January 20, 2004Assignee: Hanyang Hak Won Co., Ltd.Inventors: Si-Tae Noh, Jung-Ohk Kweon, Hee Sung Choi
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Patent number: 6645674Abstract: The present invention provides a lithium secondary battery comprising a cathode electrode containing a lithium complex oxide; an anode electrode containing metal lithium or its alloy, or carbon material; and a nonaqueous organic electrolyte containing a nonaqueous organic solvent, a lithium salt and an aromatic ether that can react to form dimers or polymers above a certain temperature and voltage and that can be expressed by Formula 1 below: wherein, R1 is independently a single bond or an alkylene group with less than or equal to 2 carbons and R2 is hydrogen or an alkyl group with less than or equal to 2 carbons. The lithium secondary battery has the advantage that its characteristics are maintained, even if it is left in its fully charged state at a high temperature for a long time and, at the same time, its reliability and stability have been improved.Type: GrantFiled: January 18, 2001Date of Patent: November 11, 2003Assignees: Samsung SDI Co., Ltd., Cheil Industries Inc.Inventors: Jeong-soon Shin, Jin-sung Kim, Eui-sun Hong, Jong-wook Lee, Young-gyu Kim, Jong-seob Kim
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Patent number: 6645670Abstract: The present invention improves the performance of lithium electrochemical cells by providing a new electrode assembly based on a sandwich cathode design, but termed a double screen sandwich cathode electrode design. In particular, the present invention uses sandwich cathode electrodes which are, in turn, sandwiched between two half double screen sandwich cathode electrodes, either in a prismatic plate or serpentine-like electrode assembly. In a jellyroll electrode assembly, the cell is provided in a case-positive design and the outside round of the electrode assembly is a half double screen sandwich cathode electrode.Type: GrantFiled: April 30, 2001Date of Patent: November 11, 2003Assignee: Wilson Greatbatch Ltd.Inventor: Hong Gan
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Publication number: 20030198871Abstract: The present invention provide a nonaqueous electrolyte comprising a nonaqueous solvent, wherein the nonaqueous solvent includes ethylene carbonate (EC), propylene carbonate (PC), &ggr;-butyrolactone (GBL) and a fourth component that is a solvent other than the EC, the PC and the GBL, and the nonaqueous solvent satisfies the following equations (1) to (4): 1 15 ≦ x ≦ 50 (1) 30 ≦ y ≦ 75 (2) 0 < z < 30 (3) 0 < p ≦ 5 (4)Type: ApplicationFiled: January 31, 2003Publication date: October 23, 2003Applicant: Kabushiki Kaisha ToshibaInventors: Masahiro Sekino, Asako Sato, Jun Momma, Masayuki Oguchi
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Publication number: 20030194612Abstract: An organic salt having an alkali metal bound to a disubstituted amide of alkane iminosulfinic acid has the following general formula: 1Type: ApplicationFiled: April 15, 2002Publication date: October 16, 2003Inventors: Elena Shembel, Ivan V. Koval, Tat?apos;yna G. Oliynik, Oleg V. Chervakov, Peter Novak
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Patent number: 6632573Abstract: Disclosed are oxidizer-treated lithium electrodes, battery cells containing such oxidizer-treated lithium electrodes, battery cell electrolytes containing oxidizing additives, and methods of treating lithium electrodes with oxidizing agents and battery cells containing such oxidizer-treated lithium electrodes. Battery cells containing SO2 as an electrolyte additive in accordance with the present invention exhibit higher discharge capacities after cell storage over cells not containing SO2. Pre-treating the lithium electrode with SO2 gas prior to battery assembly prevented cell polarization. Moreover, the SO2 treatment does not negatively impact sulfur utilization and improves the lithium's electrochemical function as the negative electrode in the battery cell.Type: GrantFiled: February 20, 2001Date of Patent: October 14, 2003Assignee: PolyPlus Battery CompanyInventors: Yevgeniy S. Nimon, May-Ying Chu, Steven J. Visco
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Publication number: 20030162100Abstract: A lithium secondary battery to be mounted on a substrate including a positive electrode, a negative electrode containing an alloy of lithium and aluminum, and a non-aqueous electrolyte containing a solute and a solvent; wherein the solvent contains propylene carbonate and diethylene glycol dialkyl ether. More preferably, the solvent also contains trialkyl phosphate.Type: ApplicationFiled: February 21, 2003Publication date: August 28, 2003Inventors: Yasufumi Takahashi, Seiji Yoshimura, Maruo Kamino
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Publication number: 20030162098Abstract: A lithium electrochemical cell of either a primary or a secondary chemistry activated with an electrolyte having a cyclic carbonate of a ring size equal to or larger than a six-member ring is described. The cyclic carbonate helps to make the anode passivation film ionically conductive to thereby eliminate voltage delay during pulse discharge and to reduce Rdc. Such a cell is particularly well suited for powering an implantable medical device, such as a cardiac defibrillator.Type: ApplicationFiled: February 19, 2003Publication date: August 28, 2003Inventors: Hong Gan, Esther S. Takeuchi
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Publication number: 20030162099Abstract: A lithium electrochemical cell includes an electrolyte having a mixture of solvents including propylene carbonate (PC) and dimethoxyethane (DME), and a salt mixture. The salt mixture includes lithium trifluoromethanesulfonate (LiTFS), and lithium trifluoromethanesulfonimide (LiTFSI), and the cell contains less than 1500 ppm by weight of sodium. The mixture of solvents can further include ethylene carbonate (EC).Type: ApplicationFiled: February 28, 2002Publication date: August 28, 2003Inventors: William L. Bowden, Nikolai N. Issaev, Michael Pozin
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Publication number: 20030138697Abstract: An improved cathode material for nonaqueous electrolyte lithium electrochemical cell is described. The preferred active material is silver vanadium oxide (SVO) coated with a protective layer of an inert metal oxide (MxOy) or lithiated metal oxide (LixMyOz). The SVO core provides high capacity and rate capability while the protective coating reduces reactivity of the active particles with electrolyte to improve the long-term stability of the cathode.Type: ApplicationFiled: January 23, 2003Publication date: July 24, 2003Inventors: Randolph Leising, Esther S. Takeuchi