Oxygen Is Ring Member Of The Hetero Ring Patents (Class 429/329)
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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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Patent number: 7261972Abstract: A nonaqueous electrolyte secondary battery includes an electrode group having a positive electrode and a negative electrode wound flatly by way of an interposed separator, a positive electrode tab electrically connected to the positive electrode, and projecting from a spiral winding surface of the electrode group, a negative electrode tab electrically connected to the negative electrode, and projecting from the spiral winding surface, and a nonaqueous electrolyte, wherein the nonaqueous solvent contains sultone compound including a ring having at least one double bond, and a distance between the positive electrode tab and the negative electrode tab is 6 mm to 18 mm.Type: GrantFiled: January 25, 2005Date of Patent: August 28, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Shusuke Inada, Masahiro Sekino, Akira Yajima, Nao Shimura, Masayuki Oguchi, Asako Satoh, Hiroshi Kitayama
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Publication number: 20070196740Abstract: The present invention provides a battery small in time variation of the battery properties from the initial battery properties over a long term storage period of the battery. The battery is a lithium secondary battery in which a positive electrode including a positive electrode active material capable of intercalating and deintercalating lithium ions and a negative electrode including a negative electrode active material capable of intercalating and deintercalating lithium ions are formed through the intermediary of an electrolyte, wherein: the negative electrode active material is a carbon material having a crystallinity of the surface thereof lower than the crystallinity of the carbon material; and the electrolyte contains an organic compound having a carboxylic anhydride group.Type: ApplicationFiled: January 18, 2007Publication date: August 23, 2007Inventors: Hiroshi Haruna, Eiji Hoshi, Kenji Hara
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Patent number: 7252908Abstract: The present invention relates to an electrolytic solution for a lithium battery and a lithium battery using the same. The organic electrolytic solution includes a lithium salt, a mixed organic solvent comprising a high dielectric constant solvent and a low boiling-point solvent, and an additive. The additive used in the electrolytic solution is a heterocyclic compound of Formula (1): where R1, R2 and R3 may each independently be a C1-C10 linear or branched alkyl group; R4 may be a C1-C10 linear or branched alkylene group; X may be a heterocyclic ring containing N and O whereby a tetraallkyl orthosilicate functional group may be linked to N. The lithium battery using the organic electrolytic solution of the present invention is highly reliable and maintains a constant thickness during a charge/discharge cycle.Type: GrantFiled: September 27, 2004Date of Patent: August 7, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Hansu Kim, Myung-Dong Cho, Hyo-Sug Lee, Boris A. Trofimov
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Patent number: 7247404Abstract: An electrolyte in a lithium secondary battery includes an alkyl ammonium salt having a cation of the following Formula 1, a lithium salt, and an organic solvent: wherein R1 to R4 are independently a C1 to C6 alkyl, a C2 to C6 alkenyl, or substituents thereof. The lithium secondary battery has improved cycle life, high rate characteristics, and a high energy density due to an increase of the average discharge voltage at a high rate.Type: GrantFiled: September 11, 2003Date of Patent: July 24, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Yongju Jung, Seok Kim, Jan-Dee 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: 7235335Abstract: Disclosed is a nonaqueous liquid electrolyte comprising a nonaqueous solvent, an electrolyte dissolved in the nonaqueous solvent and a macromolecular material added to the nonaqueous solvent. The nonaqueous liquid electrolyte is a fluid having a viscosity at 20° C. of 7 cP to 30,000 cP. The nonaqueous liquid electrolyte suppresses leakage, ensures high discharge characteristics, reduces the unevenness of liquid electrolyte, and lessens the change of electrodes and the change in battery resistivity.Type: GrantFiled: February 27, 2002Date of Patent: June 26, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuoki Kohno, Norio Takami
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Patent number: 7229717Abstract: A battery with a high capacity and superior cycle characteristics, and an anode active material used for it are provided. An anode active material contains tin as a first element, a second element, and a third element. The second element is at least one from the group consisting of boron, carbon, aluminum, and phosphorus, and the third element is at least one from the group consisting of silicon, magnesium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, gallium, zirconium, niobium, molybdenum, silver, indium, cerium, hafnium, tantalum, tungsten, and bismuth. The content of the second element in the anode active material is from 9.8 wt % to 49 wt %.Type: GrantFiled: September 21, 2005Date of Patent: June 12, 2007Assignee: Sony CorporationInventors: Akira Yamaguchi, Satoshi Mizutani, Hiroshi Inoue, Koji Sekai
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Patent number: 7229716Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode comprising a graphite as a negative electrode active material, and a nonaqueous electrolyte including at least a saturated cyclic carbonic ester and containing a cyclic carbonic ester having a carbon-carbon double bond such that, when a content of the cyclic carbonic ester having a carbon-carbon double bond is x (g), a content of the graphite in the negative electrode is B (g), a specific surface area of the graphite is A (m2/g), a size of the crystallite of the graphite in a direction of the c axis is Lc, and a size of the crystallite of the graphite in a direction of the a axis is La, a condition expressed by 0.05×10?2?x/[A×B×2Lc/(2Lc+La)]?3×10?2 is satisfied.Type: GrantFiled: September 30, 2003Date of Patent: June 12, 2007Assignee: SANYO Electric Co., Ltd.Inventors: Katsunori Yanagida, Takao Inoue, Naoya Nakanishi, Atsuhiro Funahashi, Toshiyuki Nohma
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Patent number: 7229718Abstract: Disclosed is an electrolyte for a rechargeable lithium battery including 5 to 40 volume % of at least one fluorine-substituted ether compound represented by R1—O—R2 (wherein R1 and R2 are alkyl groups substituted with fluorine), having a substitution ratio of hydrogen with fluorine of 57 to 86%, a viscosity of 0.9 to 2.3 cp, and a boiling point of at least 88° C., and 60 to 90 volume % of a non-aqueous organic solvent having a flash point of at least 80° C.Type: GrantFiled: May 15, 2003Date of Patent: June 12, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Takitaro Yamaguchi, Ryuichi Shimizu, Cheol-Soo Jung
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Patent number: 7217480Abstract: An organic electrolytic solution includes a lithium salt and an organic solvent containing a phosphonate compound, and a lithium battery utilizes the organic electrolytic solution. When using the organic electrolyte containing the phosphonate compound to manufacture a lithium secondary battery, the lithium secondary battery has improved stability to reduction-induced decomposition, reduced first cycle irreversible capacity, and improved charging/discharging efficiency and lifespan. In addition, the lithium secondary battery does not swell beyond a predetermined thickness range after formation and standard charging at room temperature and has improved reliability. Even when the lithium secondary battery swells seriously at a high temperature, its capacity is high enough for practical applications. The capacity of the lithium secondary battery may substantially be recovered after being left at a high temperature.Type: GrantFiled: January 12, 2004Date of Patent: May 15, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Jae-il Han, Hyo-sug Lee, Han-soo Kim
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Patent number: 7172834Abstract: A lithium battery includes an electrolyte comprised of a non-aqueous solvent, and a salt mixture. The salt mixture includes an alkali metal electrolyte salt and an additive salt having an anion of a mixed anhydride of oxalic acid and boric acid. Specific additive salts include lithium bis(oxalato) borate and lithium oxalyldifluoroborate. Particular electrolyte salts comprise LiPF6 and LiBF4. The additive salt is present in an amount of 0.1–60 mole percent of the total of the additive salt and electrolyte salt content of the electrolyte. Also disclosed is a method for enhancing the performance characteristics of a lithium battery through the use of the electrolyte composition. Also disclosed is the compound lithium oxalyldifluoroborate.Type: GrantFiled: July 24, 2003Date of Patent: February 6, 2007Assignee: The United States of America as represented by the Secretary of the ArmyInventors: T. Richard Jow, Shengshui Zhang, Kang Xu
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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: 7097944Abstract: A nonaqueous secondary cell including the following elements: a positive electrode capable of absorbing and releasing lithium; a negative electrode capable of absorbing and releasing lithium; and a nonaqueous electrolyte including a nonaqueoous solvent and a lithium salt dissolved therein wherein the electrolyte contains a vinyl ethylene carbonate compound represented by the general formula (1) wherein R1, R2, R3, R4, R5, and R6 represent each independently a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, and furthermore contains at least a compound selected from the group consisting of vinylene carbonate, a cyclic sulfonic acid ester or a cyclic sulfuric acid ester, and an acid anhydride.Type: GrantFiled: July 11, 2002Date of Patent: August 29, 2006Assignee: GS Yuasa CorporationInventors: Tetsuya Murai, Hiroshi Mukai
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Patent number: 7026074Abstract: A lithium battery with improved safety that utilizes one or more additives in the battery electrolyte solution wherein a lithium salt is dissolved in an organic solvent, which may contain propylene, carbonate. For example, a blend of 2 wt % triphenyl phosphate (TPP), 1 wt % diphenyl monobutyl phosphate (DMP) and 2 wt % vinyl ethylene carbonate additives has been found to significantly enhance the safety and performance of Li-ion batteries using a LiPF6 salt in EC/DEC electrolyte solvent. The invention relates to both the use of individual additives and to blends of additives such as that shown in the above example at concentrations of 1 to 4-wt % in the lithium battery electrolyte. This invention relates to additives that suppress gas evolution in the cell, passivate graphite electrode and protect it from exfoliating in the presence of propylene carbonate solvents in the electrolyte, and retard flames in the lithium batteries.Type: GrantFiled: February 15, 2002Date of Patent: April 11, 2006Assignee: The University of ChicagoInventors: Chun-hua Chen, Yoo Eup Hyung, Donald R. Vissers, Khalil Amine
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Patent number: 7022145Abstract: Disclosed is a lithium secondary battery comprising a positive electrode including a material that is capable of reversible intercalation/deintercalation of lithium ions as a positive active material; a negative electrode including a material that is capable of reversible intercalation/deintercalation of lithium ions as a negative active material; and an electrolyte including a lithium salt, a carbonate-based organic solvent, and an isoxazole compound of the following formula (1):Type: GrantFiled: November 23, 2004Date of Patent: April 4, 2006Assignees: Samsung SDI Co., Ltd., Cheil Industries Inc.Inventors: Jin Sung Kim, Jun Won Kang, Hak Soo Kim, Jong Seob Kim
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Patent number: 6955866Abstract: Batteries including a lithium anode stabilized with a metal-lithium alloy and battery cells comprising such anodes are provided. In one embodiment, an electrochemical cell having an anode and a sulfur electrode including at least one of elemental sulfur, lithium sulfide, and a lithium polysulfide is provided. The anode includes a lithium core and a ternary alloy layer over the lithium core where the ternary alloy comprises lithium and two other metals. The ternary alloy layer is effective to increase cycle life and storageability of the electrochemical cell. In a more particular embodiment, the ternary alloy layer is comprised of lithium, copper and tin.Type: GrantFiled: July 3, 2002Date of Patent: October 18, 2005Assignee: PolyPlus Battery CompanyInventors: Yevgeniy S. Nimon, May-Ying Chu, Steven J. Visco
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Patent number: 6942948Abstract: A nonaqueous electrolyte solution for secondary batteries which is an electrolyte solution for secondary batteries obtained by dissolving a lithium salt in a nonaqueous solvent, wherein the nonaqueous solvent is a solvent mainly comprising a lactone compound and the content of hydroxy carboxylic acids in the electrolyte solution is 1 mmol/kg or lower and a secondary battery employing the same are excellent in high-temperature storage characteristics, cycle characteristics, and capacity retention characteristics and in various cell characteristics in a wide temperature range and safety such as firing properties.Type: GrantFiled: March 10, 2003Date of Patent: September 13, 2005Assignee: Mitsubishi Chemical CorporationInventors: Masahiro Takehara, Takashi Fujii, Minoru Kotato, Daisuke Noda, Shinichi Kinoshita, Makoto Ue, Hitoshi Suzuki
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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: 6919141Abstract: A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one phosphate additive having the formula: (R1O)P(?O) (OR2) (OR3) and wherein R1, R2 and R3 are the same or different, wherein at least one, but not all three, of the R groups is hydrogen, or at least one of the R groups has at least 3 carbon atoms and contains an sp or sp2 hybridized carbon atom bonded to an sp3 hybridized carbon atom bonded to the oxygen atom bonded to the phosphorous atom.Type: GrantFiled: September 20, 2002Date of Patent: July 19, 2005Assignee: Wilson Greatbatch Technologies, Inc.Inventors: Hong Gan, Esther S. Takeuchi, Robert Rubino
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Patent number: 6905799Abstract: There are disclosed a non-aqueous electrolyte which comprises a non-aqueous organic solvent and a lithium salt, and further contains a compound represented by the following formula (I): wherein X represents —O—, —S—, —CO— or —SO2, Y represents a single bond, —CH2—, —CH2—CH2—, —CH?CH— or —CO— and R1 to R8 each independently represent a hydrogen atom, an alkyl group, a phenyl group, or a halogen group, provided that X and Y do not represent —CO— at the same time.Type: GrantFiled: May 25, 2001Date of Patent: June 14, 2005Assignee: Mitsubishi Chemical CorporationInventors: Kenji Okahara, Noriko Shima, Hitoshi Suzuki
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Patent number: 6846594Abstract: Disclosed is a lithium secondary battery comprising a positive electrode including a material that is capable of reversible intercalation/deintercalation of lithium ions as a positive active material; a negative electrode including a material that is capable of reversible intercalation/deintercalation of lithium ions as a negative active material; and an electrolyte including a lithium salt, a carbonate-based organic solvent, and an isoxazole compound of the following formula (1):Type: GrantFiled: May 15, 2003Date of Patent: January 25, 2005Assignees: Samsung SDI Co., Ltd., Cheil Industries Inc.Inventors: Jin Sung Kim, Jun Won Kang, Hak Soo Kim, Jong Seob Kim
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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: 6828066Abstract: A nonaqueous electrolyte secondary battery includes positive and negative electrodes, a separator, a nonaqueous electrolyte provided by dissolving a lithium salt in a nonaqueous solvent. The nonaqueous electrolyte contains a compound as shown in the chemical formula below and has a boroxin ring and polyalkylene oxide chains: R1═R1′—(O-Alk1)n1— R2═R2′—(O-Alk2)n2— R3═R3′—(O-Alk3)n3— where AlK1, AlK2, AlK3 are identical with or different from one another, each of AlK1, AlK2, AlK3 representing one type of alkylene having a carbon number of 2 or 3, and R′1, R′2, R′3 are identical with or different from one another, each of R′1, R′2, R′3 representing one type of alkyl having a carbon number of 1 or 2.Type: GrantFiled: September 19, 2002Date of Patent: December 7, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tatsuo Fujinami, Satoshi Suzuki
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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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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: 20040191629Abstract: A non-aqueous electrolyte secondary battery comprises a positive electrode including elemental sulfur, a negative electrode including silicon that stores lithium, and a non-aqueous electrolyte including a room temperature molten salt having a melting point of not higher than 60° C. The non-aqueous electrolyte may further include at least one type of solvent selected from cyclic ether, chain ether, and fluorinated carbonate. The non-aqueous electrolyte may include a reduction product of elemental sulfur. The positive electrode has a positive electrode active material made of a mixture of elemental sulfur, a conductive agent, and a binder. The electrode having a positive electrode active material is processed under reduced-pressure while immersed in the non-aqueous electrolyte. A pressure during the reduced-pressure process is preferably not higher than 28000 Pa (−55 cmHg with respect to atmospheric pressure).Type: ApplicationFiled: March 24, 2004Publication date: September 30, 2004Applicant: SANYO ELECTRIC CO., LTD.Inventors: Masaharu Itaya, Masahide Miyake, Masahisa Fujimoto
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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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Patent number: 6787268Abstract: An electrolyte for a battery comprises LiBOB salt in gamma butyrolactone and a low viscosity solvent. The low viscosity solvent may comprise a nitrile, an ether, a linear carbonate, or a linear ester. This electrolyte is suitable for use in lithium ion batteries having graphite negative electrodes. Batteries using this electrolyte have high conductivity, low polarization, and high discharge capacity.Type: GrantFiled: December 31, 2002Date of Patent: September 7, 2004Assignee: Quallion LLCInventors: Tsuneaki Koike, Hiroyuki Yumoto, Hisashi Tsukamoto
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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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Publication number: 20040170903Abstract: 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 26, 2004Publication date: September 2, 2004Applicant: SANYO ELECTRIC CO., LTD.Inventors: Satoru Fukuoka, Seiji Morita, Nobuhiro Nishiguchi, Satoru Naruse, Masayuki Muraki, Masahiro Imanishi
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Publication number: 20040161671Abstract: A liquid electrolyte for use in an electrochemical cell having an alkali metal anode is provided. The liquid electrolyte comprises an additive formed of at least one selected from the group comprising: a tautomer; an alcohol having the formula R—OH, where R is one selected from the group comprising an unsaturated carbon chain having at least two carbon atoms, a saturated carbon chain having at least one carbon atom, and an aromatic carbon chain; a sugar; and an acid selected from the group comprising nitric acid, sulfuric acid and sulfuric acid partially substituted with an ion of said alkali metal material.Type: ApplicationFiled: February 13, 2003Publication date: August 19, 2004Applicant: Medtronic, Inc.Inventors: Donald R. Merritt, Craig L. Schmidt
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Publication number: 20040157132Abstract: A lithium sulfur battery including: a cathode that contains sulfur or a sulfur compound as an active material: an anode; a separator interposed between the cathode and the anode; and an organic electrolytic solution that contains a lithium salt, dialkoxypropane having the formula of (CH2)3R1R2, and an organic solvent are provided. The organic electrolytic solution, which contains dialkoxypropane, is less reactive with lithium of the anode and improves the conductivity of lithium ions and the discharging capacity and cycle properties of lithium sulfur batteries.Type: ApplicationFiled: October 29, 2003Publication date: August 12, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Seok-soo Lee, Young-gyoon Ryu, Myung-dong Cho
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Publication number: 20040146786Abstract: The addition of a compound which reductively decomposes on a potential at least 1.0 V higher than the equilibrium potential of metallic lithium and lithium ions (a potential versus Li/Li+ of +1.0 V or more) to an electrolyte solution for a secondary cell keeps propylene carbonate, when used as an organic electrolyte therein, from decomposing on the negative electrode. Such addition also improves the cycle properties, electrical capacity and low-temperature characteristics of the cell.Type: ApplicationFiled: November 7, 2003Publication date: July 29, 2004Inventors: Takaya Sato, Hiroki Iida, Tatsuya Maruo, Kimiyo Banno
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Publication number: 20040142246Abstract: An organic electrolytic solution includes a lithium salt and an organic solvent containing a phosphonate compound, and a lithium battery utilizes the organic electrolytic solution. When using the organic electrolyte containing the phosphonate compound to manufacture a lithium secondary battery, the lithium secondary battery has improved stability to reduction-induced decomposition, reduced first cycle irreversible capacity, and improved charging/discharging efficiency and lifespan. In addition, the lithium secondary battery does not swell beyond a predetermined thickness range after formation and standard charging at room temperature and has improved reliability. Even when the lithium secondary battery swells seriously at a high temperature, its capacity is high enough for practical applications. The capacity of the lithium secondary battery may substantially be recovered after being left at a high temperature.Type: ApplicationFiled: January 12, 2004Publication date: July 22, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Jae-il Han, Hyo-sug Lee, Han-soo Kim
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Publication number: 20040137332Abstract: Disclosed is an electrolyte including a non-aqueous organic solvent, a lithium salt and an additive represented by formula 1: 1Type: ApplicationFiled: December 22, 2003Publication date: July 15, 2004Inventors: Hyeong-Gon Noh, Eui-Hwan Song
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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: 20040131933Abstract: 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: ApplicationFiled: December 18, 2003Publication date: July 8, 2004Inventors: Masaharu Itaya, Masahide Miyake, Masahisa Fujimoto
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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: 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
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Publication number: 20040101763Abstract: A non-aqueous secondary battery having an electrode group and a non-aqueous electrolytic solution, characterized in that :(1) the electrode group is contained in a casing made of a sheet having a resin layer with a thickness of 0.5 mm or less, (2) the non-aqueous solvent contains &ggr;-butyrolactone, ethylene carbonate, at least one vinylene carbonate compound and at least one vinylethylene carbonate compound, (3) the amounts of the vinylene carbonate compound, the vinylethylene carbonate compound and sum total of both are, respectively, 0.01 to 5% by weight, 0.01 to 5% by weight and 0.02 to 6% by weight, based on the total weight of the non-aqueous solvent, and (4) the amounts of the &ggr;-butyrolactone and the ethylene carbonate are, respectively, 50% by volume or more and 10% by volume or more, based on the total volume of the non-aqueous solvent.Type: ApplicationFiled: November 24, 2003Publication date: May 27, 2004Applicants: MITSUBISHI CHEMICAL CORPORATION, A&T Battery CorporationInventors: Minoru Kotato, Hitoshi Suzuki, Takahiro Yamamoto, Akira Yajima
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Publication number: 20040096747Abstract: Electrolyte solutions were suggested for electrochemical cells, for example for double-layer capacitors, which showed conductivities of more than 20 mS/cm at 25° C., at least comprising of a primary salt, which is released in a solvent alloy of “A” at least a solvent of high polarity and “B” at least a non-toxic solvent of low viscosity. Because of the low or non-availability of parts of acetonitrile, the electrolyte solutions are not in danger of a release of hydrogen cyanide if fire breaks out.Type: ApplicationFiled: December 29, 2003Publication date: May 20, 2004Inventor: Andree Schwake
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Publication number: 20040096749Abstract: An organic electrolytic solution containing a lithium salt, an organic solvent, and an oxalate compound, and a lithium battery using the organic electrolytic solution are provided. Due to the oxalate compound, the organic electrolytic solution stabilizes lithium metal and improves the conductivity of lithium ions. Also, the organic electrolytic solution present invention improves charging/discharging efficiency when used in lithium batteries having a lithium metal anode. Especially when the organic electrolytic solution is used in lithium sulfur batteries, the oxalate compound forms a chelate with lithium ions and improves the ionic conductivity and the charging/discharging efficiency of the battery. In addition, due to the chelation of the lithium ions, negative sulfur ions remain free without interaction with lithium ions, are highly likely to dissolve in an electrolytic solution. As a result, a reversible capacity of sulfur is improved.Type: ApplicationFiled: June 24, 2003Publication date: May 20, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Ju-Yup Kim, Myung-Dong Cho, Young-Gyoon Ryu
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Publication number: 20040081894Abstract: 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: ApplicationFiled: August 20, 2003Publication date: April 29, 2004Applicant: PolyPlus Battery CompanyInventors: Yevgeniy S. Nimon, May-Ying Chu, Steven J. Visco
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Patent number: 6727022Abstract: The present comprises an electrode having the configuration: first active material/current collector screen/second active material. When one of the active materials is in a powder form, it is possible for that material to move through openings in the current collector screen to “contaminate” the interface between the other active material and the current collector. The present invention consists of having the other electrode active materials in a form incapable of moving through the current collector to the other side thereof. Then, the assembly is pressed from the direction of the other electrode active material. This seals off the current collector as the pressing force moves the current collector against the powdered electrode active material.Type: GrantFiled: November 19, 2001Date of Patent: April 27, 2004Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6723473Abstract: In a non-aqueous electrolyte secondary battery, a cyclic carboxylic acid ester having a high conductivity in a low-temperature environment is used as an electrolyte, and, furthermore, a cyclic carbonic acid ester having at least one carbon-carbon unsaturated bond is added thereto for the inhibition of reductive decomposition of the cyclic carboxylic acid ester.Type: GrantFiled: November 14, 2001Date of Patent: April 20, 2004Assignees: Matsushita Electric Industrial Co., Ltd., Mitsubishi Chemical CorporationInventors: Takafumi Oura, Kazuya Iwamoto, Shinji Nakanishi, Atsushi Ueda, Hizuru Koshina
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Patent number: 6721168Abstract: The present invention provides a novel electric double-layer capacitor made of a carbon material having characteristics entirely different from those of the prior art activated carbon. The capacitor develops a capacitance by a mechanism entirely different from the mechanism of an electric double-layer capacitor using activated carbon. The novel capacitor has improved performance including capacitance. The capacitor has polarized electrodes immersed in an organic electrolyte. The electrodes are made of a nonporous carbon having crystallites of graphite-like carbon. When a voltage is applied, electrolyte ions are intercalated between the layers of the crystallites of the graphite-like carbon together with the solvent. Thus, electric double layers are formed. Intercalation is induced by the first cycle of charging. In the second and following cycles, the capacitance is developed.Type: GrantFiled: July 2, 2001Date of Patent: April 13, 2004Assignee: JEOL Ltd.Inventors: Makoto Takeuchi, Katsumi Koike, Akinori Mogami, Takamichi Maruyama
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Publication number: 20040067418Abstract: Provided is an organic electrolytic solution including a lithium salt and an organic solvent containing an alkoxy-containing compound such as 1,1,3-trimethoxypropane. When polyglyme and an organic compound having dioxolane moiety are further added into the organic electrolytic solution, a lithium metal stabilizing effect and the ionic conductivity of lithium ions are enhanced, and thus, the charging/discharging efficiency of lithium is greatly improved. Such an organic electrolytic solution can be effectively used for any kind of lithium batteries and lithium sulfur batteries, even whose which use a lithium metal anode.Type: ApplicationFiled: June 2, 2003Publication date: April 8, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Young-gyoon Ryu, Seok-soo Lee, Seung-sik Hwang
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Publication number: 20040062996Abstract: A lithium cell has a positive electrode, a negative electrode having lithium, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolytic solution containing a solute and a non-aqueous solvent. The non-aqueous solvent has a main component of one or more than one compound represented by the following general formula (1): X—(O—C2H4)n-O—Y (where X and Y are independently a methyl group or an ethyl group, and n is 2 or 3). The main component is 90 to 100% in volume of the non-aqueous solvent. The separator has a melting point of higher than 150° C. The lithium cell with the above construction does not impair heat resistant safety and electrochemical characteristics such as discharging characteristics even in severe environments of high temperature, and enhances its long period reliability.Type: ApplicationFiled: September 25, 2003Publication date: April 1, 2004Applicant: SANYO ELECTRIC CO., LTD.Inventors: Satoru Fukuoka, Seiji Morita, Nobuhiro Nishiguchi, Satoru Naruse, Masayuki Muraki, Masahiro Imanishi
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Patent number: 6713214Abstract: A secondary battery is characterized by using an organic material including carbon having a conjugate electron cloud and coupled with an electron attractive group; or a material obtained by baking a fluorocarbon polymer or graphite fluoride in an inert atmosphere at a temperature in the range of from the decomposition start temperature to 1000° C., as a positive electrode active material for the secondary battery.Type: GrantFiled: November 9, 2001Date of Patent: March 30, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Hideyuki Koga, Masahisa Fujimoto, Shin Fujitani