Sulfur Containing Organic Solvent Compound Patents (Class 429/340)
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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: 20080145762Abstract: A negative electrode is provided. The negative electrode includes a negative electrode current collector, and a negative electrode active material layer formed over the negative electrode current collector, wherein an organic material layer having ion conductivity is held by the negative electrode active material layer.Type: ApplicationFiled: November 30, 2007Publication date: June 19, 2008Applicant: SONY CORPORATIONInventors: Momoe Adachi, Isamu Konishiike, Kenichi Kawase
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Publication number: 20080138714Abstract: A battery capable of improving the storage characteristics and the cycle characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. A solvent of the electrolytic solution contains a given sulfone compound such as bis(trimethylsilyl)-2,2-difluorosulfoacetate. Compared to a case that a solvent does not contain the foregoing sulfone compound, the chemical stability of the electrolytic solution is improved, and the decomposition reaction of the electrolytic solution is suppressed.Type: ApplicationFiled: October 30, 2007Publication date: June 12, 2008Applicant: SONY CORPORATIONInventors: Masayuki Ihara, Hiroyuki Yamaguchi, Tadahiko Kubota
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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: 7368203Abstract: The present invention provides a non-aqueous electrolyte secondary cell that has good high-temperature cycle characteristics and good high-temperature standing resistance, and that is highly safe enough to prevent overcharge. The non-aqueous electrolyte secondary cell of the invention utilizes a non-aqueous electrolyte that includes a vinylene carbonate derivative, a cyclic sulfite derivative, and both/either of a phenylcycloalkane derivative and/or an alkylbenzene derivative having a quaternary carbon directly bonded to a benzene ring.Type: GrantFiled: September 26, 2003Date of Patent: May 6, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Masato Iwanaga, Kazuyasu Fujiwara, Ryuji Ohshita, Masayuki Terasaka, Masatoshi Takahashi
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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: 7358012Abstract: Disclosed is an electrochemical cell comprising a lithium anode and a sulfur-containing cathode and a non-aqueous electrolyte. The cell exhibits high utilization of the electroactive sulfur-containing material of the cathode and a high charge-discharge efficiency.Type: GrantFiled: January 6, 2004Date of Patent: April 15, 2008Assignee: Sion Power CorporationInventor: Yuriy V. Mikhaylik
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Patent number: 7354680Abstract: Disclosed is an additive for an electrochemical cell wherein the additive includes an N—O bond. The additive is most preferably included in a nonaqueous electrolyte of the cell. Also disclosed are cells and batteries including the additive, and methods of charging the batteries and cells. An electrochemical cell including the additive preferably has an anode that includes lithium and a cathode including an electroactive sulfur-containing material.Type: GrantFiled: January 6, 2004Date of Patent: April 8, 2008Assignee: Sion Power CorporationInventor: Yuriy V. Mikhaylik
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Publication number: 20080076029Abstract: A battery includes an anode having a lithium alloy as the active material, a cathode having, for example, iron disulfide as the active material, and an electrolyte containing a sulfolane and 1,2-dimethoxyethane.Type: ApplicationFiled: July 27, 2006Publication date: March 27, 2008Inventors: William L. Bowden, Todd E. Bofinger, Rimma A. Sirotina, Thomas N. Koulouris, Zhiping Jiang
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Patent number: 7338735Abstract: An organic electrolytic solution for a lithium-sulfur battery that can improve discharge capacity and cycle life of the battery, and a lithium-sulfur battery using the organic electrolytic solution are provided. The electrolytic solution includes a lithium salt, an organic solvent, and further a phosphine sulfide-based compound represented by formula (I) below: wherein R1, R2 and R3 are the same or different from each other, and each represents one selected from the group consisting of a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C1-C30 alkoxy group and a substituted or unsubstituted C8-C30 aralkenyl group. The electrolytic solution including the phosphine sulfide-based compound represented by Formula (I) can suppress production of lithium sulfides so that a reduction in battery capacity can be prevented.Type: GrantFiled: August 27, 2004Date of Patent: March 4, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Young-Gyoon Ryu, Myung-Dong Cho, Sang-Mock Lee, Boris A. Trofimov
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Publication number: 20080026290Abstract: A battery includes an anode including an alkali metal as the active material, a cathode having, for example, iron disulfide as the active material, and an electrolyte including an organic solvent and an aluminum salt selected from the group consisting of aluminum iodide and aluminum tri(sec-butoxide).Type: ApplicationFiled: July 27, 2006Publication date: January 31, 2008Inventors: Zhiping Jiang, William L. Bowden, Leslie J. Pinnell, Michael Pozin, Nikolai N. Issaev
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Publication number: 20070281217Abstract: An electrolyte and battery using same is provided. The electrolyte comprising at least one of a compound represented by Formula 1, wherein, R1, P2, R3, and R4 represent a hydrogen group, or a methyl group and an ethyl group; X, Y, and Z represent sulfur (S) or oxygen (O) or Formula 2, wherein, R1 and R2 represent a hydrogen group, a halogen group, or a methyl group and an ethyl group, or groups in which a part of hydrogen thereof is substituted by a halogen group; X, Y, and Z represent sulfur (S) or oxygen (O), which can retain chemical stability at high temperatures. Use of the electrolyte allows a battery to have excellent characteristics in a hot environment.Type: ApplicationFiled: June 4, 2007Publication date: December 6, 2007Applicant: SONY CORPORATIONInventors: Masayuki IHARA, Hiroyuki YAMAGUCHI, Tadahiko KUBOTA
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Patent number: 7297447Abstract: 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: December 10, 2002Date of Patent: November 20, 2007Assignee: Hitachi Maxell, Ltd.Inventors: Tetsuo Kawai, Atsushi Yamano, Noriyuki Yabushita, Tadashi Sakata, Hideki Nishihama
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Patent number: 7285361Abstract: A non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution where the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and a compound B oxidized at a potential lower than that of the compound A, and the compound B is at least one selected from an aromatic compound and a heterocyclic compound. Thus, a non-aqueous secondary battery having excellent overcharging safety and being capable of ensuring storage reliability with less generation of gas during storage at a high temperature can be provided.Type: GrantFiled: April 6, 2006Date of Patent: October 23, 2007Assignee: Hitachi Maxell, Ltd.Inventors: Fusaji Kita, Hideo Sakata, Haruki Kamizori
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Patent number: 7282304Abstract: 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: February 14, 2006Date of Patent: October 16, 2007Assignee: Hitachi Maxell, Ltd.Inventors: Tetsuo Kawai, Atsushi Yamano, Noriyuki Yabushita, Tadashi Sakata, Hideki Nishihama
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Patent number: 7282303Abstract: A non-aqueous secondary battery is provided, which has excellent overcharging safety, less generation of gas during storage at a high temperature, and can ensure storage reliability. A non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and an aromatic or/and heterocyclic compound B oxidized at a potential lower than that of the compound A, a content of the compound A with respect to the total non-aqueous electrolyte solution is 1% by mass to 15% by mass, and a content of the compound B with respect to the total non-aqueous electrolyte solution is 0.005% by mass to 3% by mass.Type: GrantFiled: December 19, 2002Date of Patent: October 16, 2007Assignee: Hitachi Maxell, Ltd.Inventors: Fusaji Kita, Hideo Sakata, Haruki Kamizori
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Publication number: 20070224516Abstract: The non-aqueous electrolyte secondary battery of the present invention includes a positive electrode containing a lithium-containing transition metal oxide as a positive electrode active material, a negative electrode, a separator interposed between the positive electrode and the negative electrode and a non-aqueous electrolyte. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, and the non-aqueous solvent includes a solvent having an electron-withdrawing substituent. The solvent having an electron-withdrawing substituent includes at least one selected from the group consisting of a sulfonic solvent, a nitrile solvent, a ketonic solvent, a fluorine-containing solvent, a chlorine-containing solvent and a carboxylic acid ester solvent. The separator includes a material containing an electron-withdrawing substituent or an atom having an unshared electron pair.Type: ApplicationFiled: March 22, 2007Publication date: September 27, 2007Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Masaki DEGUCHI, Tooru MATSUI, Hiroshi YOSHIZAWA
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Patent number: 7258947Abstract: The present invention provides electrolyte that can suppress reduction of battery efficiencies and capacities with increased cycles of charge/discharge of the battery, a method for producing the same, and a redox flow battery using the same electrolyte. The redox flow battery uses the electrolyte having a NH4 content of not more than 20 ppm and a relation of Si concentration (ppm)×electrolyte quantity (m3)/electrode area (m2) of less than 5 ppm·m3/m2. By limiting a quantity of contaminants in the electrolyte, a clogging of carbon electrodes to cause reduction of the battery performances with increased charge/discharge operations can be suppressed.Type: GrantFiled: April 30, 2002Date of Patent: August 21, 2007Assignees: Sumitomo Electric Industries, Ltd., The Kansai Electric Power Co., Inc.Inventors: Michiru Kubata, Hiroyuki Nakaishi, Nobuyuki Tokuda
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Patent number: 7255966Abstract: A non-aqueous electrolyte for a lithium secondary battery is provided. The electrolyte comprises a lithium salt, a non-aqueous solvent, and an organic compound selected from the group consisting of compounds represented by Formulae (1) to (6): wherein R1 to R12 are each independently selected from the group consisting of primary, secondary, and tertiary alkyl groups, alkenyl groups, and aryl groups; X is hydrogen or halogen; and n and m are numerical values ranging from 0 to 3.Type: GrantFiled: July 6, 2005Date of Patent: August 14, 2007Assignee: Samsung SDI Co., LtdInventors: Jin-Sung Kim, Meen-Seon Paik, Jung-Joon Park, Young-Gyu Kim, Jong-Seob Kim, Hak-Soo Kim, Sang-Jun Lee, Jae-Hou Nah, Sang-Moon Hwang, Chan-Jung Kim
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Publication number: 20070172730Abstract: A nonaqueous electrolyte secondary battery of the invention has a positive electrode having a positive electrode active material, a negative electrode, and a nonaqueous electrolyte having electrolyte salt in a nonaqueous solvent. The electric potential of the positive electrode active material is 4.4 to 4.6 V relative to lithium, and the nonaqueous electrolyte contains a compound expressed by structural formula (I) below. The quantity of compound added is preferably 0.1% to 2% by mass. Also, the positive electrode active material preferably comprises a mixture of a lithium-cobalt composite oxide which is LiCoO2 containing at least both zirconium and magnesium and a lithium-manganese-nickel composite oxide that has a layer structure and contains at least both manganese and nickel. Thanks to such structure, a nonaqueous electrolyte secondary battery can be provided that is charged to charging termination potential of 4.4 to 4.6 V relative to lithium and that has enhanced overcharging safety.Type: ApplicationFiled: January 23, 2007Publication date: July 26, 2007Applicants: SANYO ELECTRIC CO., LTD., UBE INDUSTRIES LTD.Inventors: Masato Iwanaga, Yukihiro Oki, Koji Abe, Kazuhiro Miyoshi
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Patent number: 7241536Abstract: A non-aqueous electrolyte for a lithium secondary battery is provided. The electrolyte comprises a lithium salt, a non-aqueous solvent, and an organic compound selected from the group consisting of compounds represented by Formulae (1) to (6): wherein R1 to R12 are each independently selected from the group consisting of primary, secondary, and tertiary alkyl groups, alkenyl groups, and aryl groups; X is hydrogen or halogen; and n and m are numerical values ranging from 0 to 3.Type: GrantFiled: May 8, 2002Date of Patent: July 10, 2007Assignee: Samsung SDI Co., LtdInventors: Jin-Sung Kim, Meen-Seon Paik, Jung-Joon Park, Young-Gyu Kim, Jong-Seob Kim, Hak-Soo Kim, Sang-Jun Lee, Jae-Hou Nah, Sang-Moon Hwang, Chan-Jung Kim
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Patent number: 7241535Abstract: A lithium-sulfur battery includes a positive electrode having at least one positive active material selected from the group consisting of an elemental sulfur, Li2Sn (n?1), Li2Sn (n?1) dissolved in catholytes, an organosulfur compound, and a carbon-sulfur polymer ((C2Sx)n: x=2.5˜50, n?2), an electrolyte having salts of an organic cation, and a negative electrode having a negative active material selected from the group consisting of a material capable of reversibly intercalating/deintercalating lithium ions, a material capable of reversibly forming a lithium-containing compound by a reaction with lithium ions, a lithium metal, and a lithium alloy.Type: GrantFiled: March 14, 2002Date of Patent: July 10, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Seok Kim, Yongju Jung, Yunsuk Choi, Jandee Kim, Soo Seok Choi
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Patent number: 7223500Abstract: An electrolyte of a lithium secondary battery includes lithium salts, an organic solvent with a high boiling point, and a carbonate-based additive compound having substituents selected from the group consisting of a halogen, a cyano (CN), and a nitro (NO2). The electrolyte improves discharge, low temperature, and cycle life characteristics of a lithium secondary battery.Type: GrantFiled: September 3, 2003Date of Patent: May 29, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Hyeong-Gon Noh, Cheol-Soo Jung, Eui-Hwan Song
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Patent number: 7223502Abstract: An object of the present invention is to provide a battery of high capacity that is excellent in storage, load, cycle, and continuous charge characteristics and that reduces gas generation; and a nonaqueous electrolyte for use in the battery. The invention relates to a nonaqueous electrolyte which comprises a nonaqueous organic solvent and a lithium salt dissolved therein, wherein the nonaqueous organic solvent contains at least one compound selected from the group consisting of acid anhydrides and carbonic esters having an unsaturated bond, and at least one compound selected from the group consisting of sulfonic compounds and fluorine-containing aromatic compounds having 9 carbon atoms or less; and a lithium secondary battery employing the same.Type: GrantFiled: September 8, 2004Date of Patent: May 29, 2007Assignee: Mitsubishi Chemical CorporationInventor: Masamichi Onuki
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Patent number: 7163768Abstract: The present invention provides a technology of inhibiting the decomposition of the solvent of the electrolyte solution for the secondary battery. Further, the present invention provides a technology of prohibiting the resistance increase of the secondary battery and improving the storage properties such as improving the capacity retention ratio. The electrolyte solution 15 comprising non-proton solvent and cyclic sulfonic ester including at least two sulfonyl groups may be used.Type: GrantFiled: August 26, 2003Date of Patent: January 16, 2007Assignee: NEC CorporationInventors: Koji Utsugi, Yuki Kusachi, Ikiko Yamazaki
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Patent number: 7115340Abstract: A non-aqueous electrolyte secondary battery according to the present invention is characterized by including a non-aqueous electrolyte which contains at least one of vinylene carbonate derivatives at a concentration of 1 wt % or less and at least one of cyclic sulfates at a concentration of 2 wt % or less. According to the present invention, a non-aqueous electrolyte secondary battery having excellent discharge characteristics at a low temperature can be obtained.Type: GrantFiled: December 23, 2002Date of Patent: October 3, 2006Assignee: GS Yuasa CorporationInventor: Sumio Mori
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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: 7060392Abstract: An electrolyte for a lithium secondary battery comprises lithium salts, a non-aqueous organic solvent, and an additive compound of formula (1): where R1 to R10 are independently selected from the group consisting of a hydrogen, alkyl, alkenyl, and alkynyl. The additive compound decomposes earlier than organic solvent to form an SEI film, and prevents decomposition of the organic solvent.Type: GrantFiled: June 17, 2004Date of Patent: June 13, 2006Assignee: Samsung SDI Co., Ltd.Inventor: Jin-Sung Kim
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Patent number: 6994936Abstract: The present invention is characterized in that a nonaqueous electrolyte contains a sultone compound having unsaturated bonds, and the present invention thereby aims at suppressing the swelling of a nonaqueous electrolyte secondary battery, as represented by a lithium secondary battery, after being allowed to stand at a high temperature and at obtaining an excellent high temperature standing performance. Furthermore, by making the nonaqueous electrolyte contain, in addition to the sultone compound containing unsaturated bonds, a vinylene carbonate derivative in 1.0 wt % or below, and/or a cyclic sulfate in 2.0 wt % or below, there can be obtain a nonaqueous electrolyte secondary battery which prevents the initial discharge capacity degradation, occurring when the addition amount of the sultone compound having unsaturated bonds is increased, and has an excellent high temperature standing performance and a large initial discharge capacity.Type: GrantFiled: October 31, 2002Date of Patent: February 7, 2006Assignee: Japan Storage Battery Co., Ltd.Inventor: Sumio Mori
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Patent number: 6936382Abstract: Provided is a lithium battery in which the cathode comprises an electroactive sulfur-containing material and the electrolyte comprises a lithium salt, a non-aqueous solvent, and one or more capacity-enhancing reactive components. Suitable reactive components include electron transfer mediators. Also are provided methods for making the lithium battery.Type: GrantFiled: March 17, 2003Date of Patent: August 30, 2005Assignee: Moltech CorporationInventors: Yuriy V. Mikhaylik, Terje A. Skotheim, Boris A. Trofimov
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Patent number: 6921612Abstract: Provided are a nonaqueous electrolyte for improving overcharge safety and a lithium battery using the same. The nonaqueous electrolyte according to the present invention forms a polymer due to its oxidative decomposition even if there is an increase in voltage due to overcharge of a battery by some uncontrollable conditions, so that overcharge current is continuously consumed, thereby protecting the battery. Therefore, overcharge safety of the battery can be enhanced, and occurrence of swelling is reduced. Also, deterioration in formation, standard capacity and cycle life characteristics can be prevented.Type: GrantFiled: October 17, 2002Date of Patent: July 26, 2005Assignee: Samsung SDI Co., Ltd.Inventors: Sang-hoon Choy, Hyeong-gon Noh, Ha-young Lee, Hee-young Sun, Ho-sung Kim
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Patent number: 6913856Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode having a positive electrode active material, a negative electrode containing a negative electrode active material capable of being doped/undoped with lithium, and a nonaqueous electrolyte. The nonaqueous electrolyte contains at least one of thiols, thiophenes, thioanisoles, thiazoles, thioacetates, aromatic sulfones, and the derivatives thereof. The capacity of the battery is not significantly degraded after cycling and its cycle life is significantly long.Type: GrantFiled: April 18, 2001Date of Patent: July 5, 2005Assignee: Sony CorporationInventors: Takao Nirasawa, Hidetoshi Ito, Atsuo Omaru
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Patent number: 6893764Abstract: An object of the present invention is to provide a highly durable solid polymer electrolyte that has a deterioration resistance equal to or higher than that of the fluorine-containing solid polymer electrolytes or a deterioration resistance sufficient for practical purposes, and can be produced at a low cost. According to the present invention, there is provided a solid polymer electrolyte comprising a polyether ether sulfone that is used as a electrolyte and has sulfoalkyl groups bonded to its aromatic rings and represented by the general formula —(CH2)n—SO3H.Type: GrantFiled: July 31, 2002Date of Patent: May 17, 2005Assignee: Hitachi, Ltd.Inventors: Tohru Koyama, Toshiyuki Kobayashi, Kenji Yamaga, Tomoichi Kamo, Kazutoshi Higashiyama
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Patent number: 6866966Abstract: A discharge capacity retention of a non-aqueous secondary battery is enhanced by incorporating into its non-aqueous electrolytic solution a small amount of a substituted diphenyldisulfide derivative in which each of the diphenyl groups has a substituent such as alkoxy, alkenyloxy, alkynyloxy, cycloalkyloxy, aryloxy, acyloxy, alkanesulfonyloxy, arylsulfonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, halogen, CF3, CCl3, or CBr3. Preferably, a small amount of methyl 2-propylcarbonate, 2-propynyl methanesulfonate, 1,3-propanesultone, divinylsulfone, 1,4-butanediol dimethanesulfonate or cyclohexylbenzene is further incorporated.Type: GrantFiled: October 22, 2001Date of Patent: March 15, 2005Assignee: Ube Industries, Ltd.Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori, Akira Ueki
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Patent number: 6849362Abstract: A polymer electrolyte composition for improving overcharge safety and a lithium battery using the same are provided. The polymer electrolyte composition includes acrylate, epoxy or isocyanate at both of its terminals, and includes a compound containing an aromatic group such as thiophene, biphenyl or furan in an amount of 0.1% to 20% by weight based on the amount of the overall organic electrolytic solution. The polymer electrolyte composition further includes at least one of polyethylene glycol diacrylate (PEGDA), polyethylene glycol dimethacrylate (PEGDMA), and a mixture thereof. A lithium polymer battery using the polymer electrolyte composition can be suppressed from danger of ignition or explosion when the battery is overcharged due to some uncontrolled conditions, such as failure of a charger. Moreover, an additional cutoff device is not necessary, while still exhibiting good life cycle characteristics of the battery.Type: GrantFiled: October 23, 2002Date of Patent: February 1, 2005Assignee: Samsung SDI Co., Ltd.Inventor: Hyeong-Gon Noh
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Publication number: 20040265702Abstract: An electrolyte for a lithium secondary battery comprises lithium salts, a non-aqueous organic solvent, and an additive compound of formula (1): 1Type: ApplicationFiled: June 17, 2004Publication date: December 30, 2004Inventor: Jin-Sung Kim
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Publication number: 20040259002Abstract: 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: ApplicationFiled: April 2, 2004Publication date: December 23, 2004Inventors: Jin-Hee Kim, Jin-Sung Kim, Sang-Moon Hwang, Meen-Seon Paik, Hak-Soo Kim
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Publication number: 20040224232Abstract: A nonaqueous electrolyte secondary battery is provided with a positive electrode including a positive-electrode active material, a negative electrode including a negative-electrode active material, and a nonaqueous electrolyte solution. The negative electrode further includes carbon fibers and carbon flakes. The synergistic effects of the improved retention of the electrolyte solution by the carbon fibers and the improved conductivity between the active material particles by the carbon flakes facilitate doping/undoping of lithium in a high-load current mode and increase the capacity of the battery in the high-load current mode.Type: ApplicationFiled: June 8, 2004Publication date: November 11, 2004Inventors: Akira Yamaguchi, Shinji Hatake, Atsuo Omaru, Masayuki Nagamine
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Publication number: 20040219407Abstract: A fuel cell system includes a fuel cell apparatus and a heat storage device. The heat storage device is in fluid communication with and responsive to the fuel cell apparatus and is adapted to receive and store heat from and deliver heat to the fuel cell apparatus.Type: ApplicationFiled: April 30, 2003Publication date: November 4, 2004Inventors: Trent Molter, Mark Lillis, Spyros Nomikos
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Publication number: 20040214091Abstract: An electrolyte of a lithium battery includes a non-aqueous organic solvent, a lithium salt, and a compound additive such as a sulfone-based compound, a carbonate-based compound, and a sulfoxide compound that substantially include aromatic hydrocarbon groups. The lithium battery utilizing the electrolyte of the present invention has improved electrochemical properties such as capacity at a high rate and safety of the battery during overcharge.Type: ApplicationFiled: April 7, 2004Publication date: October 28, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Hyun-Jeong Lim, Eui-Hwan Song
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Publication number: 20040202930Abstract: The present invention is concerned with novel compounds derived from polyquinonic ionic compounds and their use in electrochemical generators.Type: ApplicationFiled: April 14, 2004Publication date: October 14, 2004Inventors: Michel Armand, Christophe Michot, Nathalie Ravet
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Patent number: 6803152Abstract: A nonaqueous electrolyte additive includes an organosilicon backbone including at least one ethylene oxide (CH2CH2O) unit, at least two pyridinium groups bound to the backbone, the pyridinium groups each bound to at least one halogen ion or halogen-containing anion. The additive is useful for forming improved liquid and polymer electrolytes for lithium ion and lithium metal batteries.Type: GrantFiled: April 19, 2002Date of Patent: October 12, 2004Assignee: ENER1 Battery CompanyInventors: Elena M. Shembel, Oleg V. Chervakov, Natalya I. Globa, Peter Novak
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Publication number: 20040197667Abstract: An electrolyte of a lithium secondary battery includes lithium salts, an organic solvent with a high boiling point, and a carbonate-based additive compound having substituents selected from the group consisting of a halogen, a cyano (CN), and a nitro (NO2). The electrolyte improves discharge, low temperature, and cycle life characteristics of a lithium secondary battery.Type: ApplicationFiled: September 3, 2003Publication date: October 7, 2004Applicant: SAMSUNG SDI CO., LTD.Inventors: Hyeong-Gon Noh, Cheol-Soo Jung, Eui-Hwan Song
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Publication number: 20040191636Abstract: A nonaqueous electrolyte secondary battery including a positive electrode containing a positive electrode active material, a negative electrode containing a carbon material as a negative electrode active material, and a nonaqueous electrolyte containing a solvent and a solute wherein sulfolane is included in the nonaqueous electrolyte as a solvent and vinyl ethylene carbonate and vinylene carbonate or a derivative of the vinylene carbonate are added to the nonaqueous electrolyte.Type: ApplicationFiled: March 26, 2004Publication date: September 30, 2004Inventors: Yoshinori Kida, Katsunori Yanagida, Atsushi Yanai, Takaaki Ikemachi, Toshiyuki Nohma
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Publication number: 20040185347Abstract: An electrolyte for a lithium secondary battery includes lithium salts, a non-aqueous organic solvent, and additive compounds. 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, and prevent decomposition of the organic solvent. Accordingly, the electrolyte inhibits gas generation caused by decomposition of the organic solvent at initial charging, and thus reduces an increase of internal pressure and swelling during high temperature storage, and also improves safety of the battery during overcharge.Type: ApplicationFiled: September 10, 2003Publication date: September 23, 2004Applicants: 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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Publication number: 20040157133Abstract: Disclosed is an electrolyte for a lithium secondary battery.Type: ApplicationFiled: November 18, 2003Publication date: August 12, 2004Inventors: Jin-Sung Kim, Jong-Wook Lee, Kwang-Sik Kim, Young-Gyu Kim, Je-Yun Kim, Jong-Seob Kim
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Publication number: 20040137333Abstract: This invention provides a lithium ion secondary battery comprising a cathode, an anode and an nonaqueous electrolytic solution in which an electrolyte is dissolved in a nonaqueous solvent, wherein the anode comprises a non-graphitizable carbon as an anode activator; and the nonaqueous electrolytic solution comprises at least one anode protecting component selected from the group consisting of sultones having a 5- to 7-membered cyclic sulfonate structure and their substituted derivatives as well as vinylene carbonates and their substituted derivatives.Type: ApplicationFiled: December 22, 2003Publication date: July 15, 2004Applicant: NEC CORPORATIONInventors: Junko Nishiyama, Tamaki Miura, Koji Utsugi
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Publication number: 20040121240Abstract: A non-aqueous electrolyte comprising (i) a non-aqueous solvent, especially mainly composed of a cyclic carbonate and a cyclic ester and optionally a linear carbonate, and (ii) an electrolyte salt, especially LiBF4, dissolved therein and (iii) a vinyl sulfone derivative having the formula (I): 1Type: ApplicationFiled: December 9, 2003Publication date: June 24, 2004Applicant: Ube Industries, Ltd.Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori
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Publication number: 20040110068Abstract: A safe high-performance lithium secondary cell is provided whereby bulging of a lithium secondary cell during storage at a high temperature, which is particularly problematic when a casing accommodating a cell element is a variable shape casing, is suppressed.Type: ApplicationFiled: December 5, 2003Publication date: June 10, 2004Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Keiichi Seki, Mitsuharu Kobayashi, Hiroyuki Saito, Masaki Yamamoto
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Publication number: 20040101762Abstract: An electrolyte for a lithium secondary battery comprises a non-aqueous organic solvent including 20 to 95 vol % of an ester-based or ether-based organic solvent based on the total amount of organic solvent; lithium salts; and an additive compound having at least two carbonate groups. A lithium secondary battery including this electrolyte has good swelling inhibition properties as well as electrochemical properties such as capacity and cycle life.Type: ApplicationFiled: November 18, 2003Publication date: May 27, 2004Inventor: Hyeong-Gon Noh