The Hetero Ring Is A Cyclic Carbonate (e.g., Ethylene Carbonate, Propylene Carbonate, Etc.) Patents (Class 429/338)
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Publication number: 20020026707Abstract: A method for manufacturing a lithium secondary cell comprising a positive electrode containing a lithium titanate as an active material, a negative electrode containing a carbonaceous material as an active material, and an electrolytic solution comprising a solution of a lithium salt in an organic solvent.Type: ApplicationFiled: November 9, 2001Publication date: March 7, 2002Applicant: Hitachi Maxell, Ltd.Inventors: Shinji Yamasaki, Takatomo Nishino, Akira Asada
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Patent number: 6350542Abstract: 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 sulfite additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is an alkyl sulfite compound.Type: GrantFiled: January 24, 2000Date of Patent: February 26, 2002Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi
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Publication number: 20020022182Abstract: The present invention relates to fluoroalkyl phosphates, to a process for the preparation, and to their use as conductive salts in batteries, capacitors, supercapacitors and galvanic cells.Type: ApplicationFiled: August 1, 2001Publication date: February 21, 2002Applicant: MERCK Patent GmbHInventors: Udo Heider, Michael Schmidt, Andreas Kuhner, Peter Sartori, Nikolai Ignatyev
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Publication number: 20020009652Abstract: A non-aqueous electrolyte battery excellent in high-temperature storage characteristics is provided by adding to the non-aqueous electrolye a compound represented by the following formula: 1Type: ApplicationFiled: May 24, 2001Publication date: January 24, 2002Inventors: Atsushi Ueda, Kazuya Iwamoto, Hiroshi Yoshizawa
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Publication number: 20020006549Abstract: A mixed metal oxide, such as silver vanadium oxide, prepared by sequential decomposition and combination reactions is described. In the case of silver vanadium oxide, the product material is produced from a decomposable salt of silver and vanadium oxide first heated above the decomposition temperature of the silver salt followed by cooling and then a second heating above the decomposition temperature. The product silver vanadium oxide material is coupled with a lithium anode and activated with a nonaqueous electrolyte to provide an improved high energy density electrochemical cell having increased pulse voltages and a reduction in voltage delay.Type: ApplicationFiled: March 12, 2001Publication date: January 17, 2002Inventors: Randolph A. Leising, Esther S. Takeuchi
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Publication number: 20020001756Abstract: A non-aqueous electrolytic solution favorably employable for a lithium secondary battery employs a non-aqueous electrolytic solution which comprises a non-aqueous solvent and an electrolyte which further contains 0.001 to 0.Type: ApplicationFiled: May 25, 2001Publication date: January 3, 2002Applicant: Ube Industries, Ltd.Inventors: Toshikazu Hamamoto, Koji Abe, Akira Ueki
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Publication number: 20010053483Abstract: A non-aqueous electrolyte cell in which structural changes of the positive electrode active material are suppressed to increase the capacity further. The non-aqueous electrolyte cell includes a positive electrode containing a lithium-transition metal compound oxide as a positive electrode active material, a negative electrode containing a carbon compound or metal lithium as a negative electrode active material and a non-aqueous electrolyte interposed between said positive and negative electrodes. The lithium-transition metal compound oxide is represented by the general formula LixMnO2 or LixMn1−yAlyO2 where 0.94≦x≦0.96 and 0.06≦y≦0.25.Type: ApplicationFiled: March 19, 2001Publication date: December 20, 2001Inventor: Kiyoshi Yamaura
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Patent number: 6326105Abstract: Polymer electrolyte composites for alkali metal electrochemical devices which are formed by coating an inert, lightweight, electrically insulating, non-woven glass fiber net which includes a polyvinyl alcohol binder, with a liquid polymer which may be ionically conductive, and curing the polymer to form a solid or semi-solid state electrolyte composite.Type: GrantFiled: June 20, 2000Date of Patent: December 4, 2001Assignee: Lithium Technology CorporationInventors: Joseph B. Kejha, Santha Kolla, Jay Forlino
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Publication number: 20010038949Abstract: A non-aqueous electrolyte secondary battery having excellent charge/discharge characteristics and a long cycle life, and generating a smaller amount of gas during storage than conventional batteries, comprising a positive electrode; a negative electrode; and a non-aqueous electrolyte comprising a non-aqueous solvent and a solute dissolved therein.Type: ApplicationFiled: April 10, 2001Publication date: November 8, 2001Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Makino Hatazaki, Kazuya Iwamoto, Kumiko Sonoda, Hiroshi Yoshizawa
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Polycarbonate electrolyte, the preparation thereof and polymer lithium batteries containing the same
Patent number: 6300016Abstract: A polycarbonate electrolyte comprising a polycarbonate membrane matrix and a lithium salt-containing electrolytic solution impregnated into the polycarbonate membrane matrix.Type: GrantFiled: August 27, 1999Date of Patent: October 9, 2001Assignee: Industrial Technology Research InstituteInventors: Yih-Song Jan, Jong-Ming Lin, Mei-Hui Wang, Sheng-Feng Wu -
Publication number: 20010016289Abstract: The present invention relates to a nonaqueous electrolyte secondary battery, and more particularly to its separator, and it is an object thereof to prevent electrolyte leakage accident due to elevation of cell internal pressure even if the cell is exposed to high temperature without sacrificing the cell capacity.Type: ApplicationFiled: January 8, 1998Publication date: August 23, 2001Inventors: TAKAFUMI OURA, MASAKI KITAGAWA, HAJIME NISHINO, HIZURU KOSHINA
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Patent number: 6274269Abstract: An alkali metal, solid cathode, nonaqueous electrochemical cell capable of delivering high current pulses, rapidly recovering its open circuit voltage and having high current capacity, is described. The stated benefits are realized by the addition of at least one phosphate additive to an electrolyte comprising an alkali metal salt dissolved in a mixture of a low viscosity solvent and a high permittivity solvent. A preferred solvent mixture includes propylene carbonate, dimethoxyethane and an alkyl phosphate additive.Type: GrantFiled: January 25, 2000Date of Patent: August 14, 2001Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6265110Abstract: A lithium secondary battery has a negative electrode structure, an electrolyte and a positive cathode structure, the negative electrode structure being of at least 40% by weight of natural flake graphite, having an La-value of at least 300 nm and/or an Lc-value in the range 50-150 nm and an La-Lc-ratio of at least 2, and the electrolyte having at least 10% by weight of propylene carbonate based on the weight of the solvent and salts of the electrolyte system. Natural flake graphite is compatible with propylene carbonate containing electrolytes, thereby forming stable battery configurations.Type: GrantFiled: September 23, 1999Date of Patent: July 24, 2001Assignee: Danionics A/SInventors: Ningling Rao, Steen Yde-Andersen
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Publication number: 20010004506Abstract: 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 phosphonate additive having the formula (R1O)P(═O) (OR2) (R3) provided in the electrolyte. In the phosphonate formula, R3 is a hydrogen atom and wherein at least one, but not both, of R1 and R2 is a hydrogen atom and the other of R1 and R2 is an organic group containing 1 to 13 carbon atoms. Or, at least one of R1 and R2 is an organic group containing at least 3 carbon atoms and having an sp or sp2 hybridized carbon atom bonded to an sp3 hybridized carbon atom bonded to the oxygen atom bonded to the phosphorous atom, or at least one of R1 and R2 is an unsaturated inorganic group.Type: ApplicationFiled: December 19, 2000Publication date: June 21, 2001Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6210835Abstract: 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: February 19, 1999Date of Patent: April 3, 2001Assignee: Hitachi, Ltd.Inventor: Juichi Arai
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Patent number: 6203942Abstract: 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 to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is an alkyl phosphate compound.Type: GrantFiled: May 3, 1999Date of Patent: March 20, 2001Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6200701Abstract: 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 phosphonate additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is an alkyl phosphonate compound.Type: GrantFiled: June 2, 1999Date of Patent: March 13, 2001Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6165647Abstract: A battery excellent in high temperature storage characteristic is presented. It comprises a positive electrode having a positive electrode active material containing an transition metal complex oxide containing lithium , a negative electrode containing a negative electrode material capable of storing and releasing a lithium ion, and an electrolytic solution containing a nonaqueous solvent, an electrolyte, and an organic compound expressed in formula 1. ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 have individually at least one of H and a group containing a vinyl group, and the number of H substituent is four or less.Type: GrantFiled: April 9, 1999Date of Patent: December 26, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shoichiro Watanabe, Kazuya Iwamoto, Atsushi Ueda, Jun Nunome, Hizuru Koshina
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Patent number: 6153338Abstract: An alkali metal secondary electrochemical cell, and preferably a lithium ion cell, activated with a quaternary solvent system, is described. The solvent system comprises a quaternary mixture of dialkyl carbonates and cyclic carbonates, and preferably dimethyl carbonate, diethyl carbonate, ethylmethyl carbonate and ethylene carbonate. Lithium ion cells activated with this electrolyte have good room temperature cycling characteristics and excellent low temperature discharge behavior.Type: GrantFiled: August 13, 1998Date of Patent: November 28, 2000Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6150057Abstract: An autoclavable elctrochemical cell which may be used in an implantable medical device. The anode active material is lithium or other material from groups IA and IIA of the Periodic Table and having a melting point greater than about 150 degrees C. The cathode active material is silver vanadium oxide or other metal oxide or carbon monoflouride. The solvent for the electrolyte has a boiling point greater than about 100 degrees C. and a dielectric constant greater than about 5 so that the cell may be dimensionally and chemically stable during repeated exposures of about one hour each to the autoclaving temperatures.Type: GrantFiled: March 14, 1995Date of Patent: November 21, 2000Assignee: Wilson Greatbatch Ltd.Inventor: Esther S. Takeuchi
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Patent number: 6139991Abstract: An electrolyte solution for a lithium secondary battery comprising a non-aqueous solvent, and an electrolyte and a carbonic ester derivative both dissolved therein, said carbonic ester derivative having the formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R.sup.2 may be a hydrogen atom and provided that R.sup.1 and R.sup.2 may be connected through a methylene group to form a cycloalkyl group having 3 to 6 carbon atoms.Type: GrantFiled: August 21, 1998Date of Patent: October 31, 2000Assignee: Ube Industries, Ltd.Inventors: Toshikazu Hamamoto, Atsuo Hitaka, Yukio Nakada, Koji Abe, Tsutomu Takai
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Patent number: 6136477Abstract: 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 nitrate additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is an organic alkyl nitrate compound.Type: GrantFiled: May 26, 1999Date of Patent: October 24, 2000Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6124061Abstract: To obtain a lithium ion secondary battery having excellent charge and discharge characteristics in which electric connection between electrodes can be maintained without requiring a strong armor metal case, so that it can be made into thin forms having large energy density.Type: GrantFiled: December 3, 1997Date of Patent: September 26, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kouji Hamano, Yasuhiro Yoshida, Hisashi Shiota, Shou Shiraga, Shigeru Aihara, Michio Murai, Takayuki Inuzuka
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Patent number: 6074777Abstract: Non-aqueous rechargeable lithium batteries can be protected against overcharge abuse by incorporating small amounts of suitable additives into the electrolyte. Additives selected from the group consisting of phenyl-R-phenyl compounds wherein R is an aliphatic hydrocarbon, fluorine substituted biphenyl compounds, and 3-thiopheneacetonitrile can provide superior cycling performance along with satisfactory overcharge protection in high voltage lithium ion batteries. 2,2-diphenylpropane can be a preferred gassing agent additive in batteries equipped with electrical disconnect devices.Type: GrantFiled: February 25, 1998Date of Patent: June 13, 2000Assignee: E-One Moli Energy (Canada) LimitedInventors: Jan Naess Reimers, Brian Michael Way
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Patent number: 6057058Abstract: The invention provides a lithium secondary battery with improved withstanding overcharge and overdischarge characteristics which employs a cathode active material of lithium-containing manganese dioxide having a crystal structure of the Ramsdellite-type. An electrolyte combined with the cathode includes LiN(CF.sub.3 SO.sub.2).sub.2 as a solute. The solute is preferably dissolved in ethylene carbonate. A graphite or LiAl alloy is applied for an anode. LiAl alloy is corrosion-resistant, thereby improving high temperature as well as charge-discharge cycle life characteristics.Type: GrantFiled: July 2, 1997Date of Patent: May 2, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Nobuharu Koshiba, Tatsuo Mori, Emi Asaka, Akira Kakinuma
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Patent number: 6033809Abstract: A non-aqueous electrolyte lithium secondary battery comprising a cathode, an anode and a non-aqueous electrolyte comprising an electrolyte dissolved in a non-aqueous solvent, wherein the cathode is composed of a material containing a lithium complex oxide, the anode is composed of a material containing graphite and the non-aqueous solvent contains, as main components, a cyclic carbonate and a linear carbonate and 0.1 to 4% by weight, based upon the total weight of the non-aqueous solvent, of a sultone derivative having the general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently represent an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms or a hydrogen atom and n is an integer of 0 to 2.Type: GrantFiled: August 21, 1998Date of Patent: March 7, 2000Assignee: UBE Industries, Ltd.Inventors: Toshikazu Hamamoto, Atsuo Hitaka, Yukio Nakada, Koji Abe
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Patent number: 6030719Abstract: The present invention is directed to a lithium ion electrolytic cell having a controlled electrode surface interface, and, an associated electrochemical process. The lithium ion electrolytic cell includes an electrode with a carbonaceous surface and a passivating layer, and, an electrolyte having a solvent. The passivating layer includes lithium, carbon and at least one of an additive or the product of interaction of the additive with the carbonaceous surface. The passivating layer has, as measured by X-ray photoelectron spectroscopy, a relative thickness index within the range of about from 10 to about 90, and a lithium ion content index in the range from about 0.1 to about 0.7.Type: GrantFiled: August 20, 1998Date of Patent: February 29, 2000Assignee: Mitsubishi Chemical CorporationInventors: Denis G. Fauteux, Jie Shi, Kazuko Otani, Eitaro Takahashi, Kenji Okahara
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Patent number: 6025094Abstract: Disclosed is an alkali metal negative electrode having a protective layer. Specifically, the disclosed negative electrode includes a glassy or amorphous surface protective layer which conducts alkali metal ions but effectively blocks the alkali metal in the electrode from direct contact with the ambient. The protective layer has improved smoothness and reduced internal stress in comparison to prior protective layers such as those formed by sputtering. In a specific embodiment, the protective layer is formed on the lithium metal electrode surface by a plasma assisted deposition technique.Type: GrantFiled: May 29, 1998Date of Patent: February 15, 2000Assignee: PolyPlus Battery Company, Inc.Inventors: Steven J. Visco, May-Ying Chu
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Patent number: 5993997Abstract: Provided is a novel lithium secondary battery comprising a positive electrode comprising a compound capable of occluding and discharging lithium, a negative electrode composed mainly of a carbon material which comprises a graphite as an only or as a principal component, a separator between said positive electrode and said negative electrode; and an electrolyte solution of an electrolyte solute dissolved in a solvent comprising at least one specific cyclic compound. The lithium secondary battery has a large capacity, small self-discharge rate and excellent cycle characteristics and high charge-discharge efficiency.Type: GrantFiled: March 30, 1998Date of Patent: November 30, 1999Assignee: Sanyo Electric Co., LtdInventors: Masahisa Fujimoto, Noriyuki Yoshinaga, Koji Ueno, Nobuhiro Furukawa, Toshiyuki Nohma, Masatoshi Takahashi
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Patent number: 5908717Abstract: An electrochemical cell (10) includes first and second electrodes (12) and (14) with an electrolyte system (26) disposed therebetween. The electrolyte system includes a polymeric support structure through which is dispersed an electrolyte active species in an organic solvent. The solvent, which remains liquid to low temperatures, is a binary or higher order system comprising diethyl carbonate and one or more of propylene carbonate, ethylene carbonate, dimethyl carbonate, dipropylcarbonate, dimethylsulfoxide, acetonitrile, dimethoxyethane, tetrahydrofuran, n-methyl-2-pyrrolidone, and combinations thereof.Type: GrantFiled: August 28, 1997Date of Patent: June 1, 1999Assignee: Motorola, Inc.Inventors: Shekhar L. Pendalwar, Manuel Oliver, Ganesh Venugopal
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Patent number: 5891588Abstract: A lithium secondary battery including a negative electrode having has been inserted an active material at least one member selected from the group of metallic lithium, lithium alloys and materials which are capable of electrochemically occluding and releasing lithium ions; a positive electrode having an active material consisting of at least one compound which is capable of electrochemically occluding and releasing lithium ions; and an organic electrolyte. The solvent for the organic electrolyte is composed mainly of a mixture solvent prepared by mixing an organic solvent indicated by Formula I, 4-trifluoromethyl-1,3-dioxolane-2-one, and one or two selected from the group of organic solvents indicated by Formula II, 1-trifluoroethylmethyl carbonate, and an organic solvent indicated by Formula III, di-1-trifluorethyl carbonate, as mentioned below.Type: GrantFiled: May 8, 1997Date of Patent: April 6, 1999Assignee: Furukawa Denchi Kabushiki KaishaInventors: Shigeru Sakai, Masahiro Yamamoto