Halogen Containing Polymer Patents (Class 429/316)
-
Publication number: 20030129480Abstract: A solid electrolyte battery is disclosed which is capable of raising an energy density without deterioration of discharge load characteristics thereof, incorporating a wound electrode incorporating a positive electrode incorporating an elongated positive-electrode collector having two sides on which positive-electrode active material layers are formed, a negative electrode incorporating an elongated negative-electrode collector having two sides on which negative-electrode active material layers are formed and a solid electrolyte layer formed between the positive electrode and the negative electrode such that the positive electrode and the negative electrode are laminated and wound, wherein when an assumption is made that the total thickness of a pair of the positive-electrode active material layers formed on the two sides of the collector for the positive electrode is total film thickness A and the total thickness of a pair of the negative-electrode active material layers formed on the two sides of the collecType: ApplicationFiled: February 18, 2003Publication date: July 10, 2003Inventors: Hiroyuki Akashi, Goro Shibamoto, Shuji Goto
-
Publication number: 20030124432Abstract: An electrolyte composition, which contains (1) a polymer having an ether linkage optionally having a crosslinkable functional group, (2) an additive containing an organic silicon compound having an ethylene oxide unit, and (3) an electrolyte salt compound, is excellent in mechanical properties and ionic conductivity.Type: ApplicationFiled: November 7, 2002Publication date: July 3, 2003Inventors: Katsuhito Miura, Shouhei Matsui, Seiji Nakamura, Yoshihiko Wada
-
Publication number: 20030124431Abstract: Provided are a fluoride copolymer, a polymer electrolyte comprising the fluoride copolymer, and a lithium battery employing the polymer electrolyte. The polymer electrolyte preferably includes as the fluoride copolymer at least one fluoride polymer selected from a polyethylene glycol methylether (meth)acrylate (PEGM)A)-2,2,2-trifluoroethylacrylate (TFEA) polymer, a PEGMA-TFEA-acrylonitrile (AN) polymer, a PEGMA-TFEA-methyl methacrylate (MMA) polymer, a PEGMA-TFEA-vinylpyrrolidone (VP) polymer, a PEGMA-TFEA-trimethoxyvinylsilane (TMVS) polymer, and a PEGMA-TFEA-ethoxy ethylacrylate (EEA) polymer.Type: ApplicationFiled: September 11, 2002Publication date: July 3, 2003Inventors: Seung-Sik Hwang, Myung-Dong Cho
-
Publication number: 20030108799Abstract: The invention concerns an all-solid-state electrochemical generator (1) comprising a negative electrode (4) capable of supplying a lithium cation, an all-solid-state polymer electrolyte (3) formed with a macromolecular material wherein ionised lithium salt is dissolved and a second positive electrode capable of incorporating a non-ionised species corresponding to said lithium cation. The invention is characterised in that the all-solid-state polymer electrolyte comprises one or several fluorinated polymer(s) and the mass ratio macromolecular material/fluorinated polymer(s) ranges between 6 and 700.Type: ApplicationFiled: November 6, 2002Publication date: June 12, 2003Inventors: Stephane Lascaud, Marc Deschamps
-
Publication number: 20030108798Abstract: Disclosed are a lithium salt expressed by a formula, LiAlXn(OY)4-n, where “X” is an electrophilic substituent group and “Y” is an oligoether group, an ionic conductor with the lithium salt dispersed in a structural member, and a liquid electrolyte with the lithium salt dissolved in a solvent. For example, the ionic conductor exhibits high ionic conductivity as well as high lithium ion transport number.Type: ApplicationFiled: November 8, 2002Publication date: June 12, 2003Inventor: Tatsuo Fujinami
-
Publication number: 20030091904Abstract: A dimensionally stable, highly resilient, hybrid copolymer solid-solution electrolyte-retention film for use in a lithium ion battery in one preferred embodiment has a predominantly amorphous structure and mechanical strength despite contact with liquid solvent electrolyte. The film is a thinned (stretched), cast film of a homogeneous blend of two or more polymers, one of which is selected for its pronounced solvent retention properties. A very high surface area inorganic filler dispersed in the blend during formation thereof serves to increase the porosity of the film and thereby enhance electrolyte retention. The film is soaked in a solution of liquid polymer with liquid organic solvent electrolyte and lithium salt, for absorption thereof. Use of a cross-linked liquid polymer enhances trapping of molecules of the electrolyte into pores of the film. The electrolyte film is sandwiched between flexible active anode and cathode layers to form the lithium ion battery.Type: ApplicationFiled: July 2, 2002Publication date: May 15, 2003Applicant: LITHIUM POWER TECHNOLOGIES, INC.Inventor: M. Zafar A. Munshi
-
Publication number: 20030082458Abstract: 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: ApplicationFiled: August 26, 2002Publication date: May 1, 2003Applicant: Noboru OYAMAInventor: Noboru Oyama
-
Publication number: 20030077516Abstract: An electrochemical cell is made by assembling an anodic layer and a cathodic layer, these layers being separated by a plasticised membrane of polymeric material consisting of a PVdF-type polymer chain, and ethylene carbonate as a plasticiser, but containing no lithium salt, the membrane being less than 30 &mgr;m thick and being cast from a volatile solvent. The resulting cell precursor is soaked in an electrolyte solution to form the cell. The membrane absorbs the electrolyte solution, forming a gelled or polymeric electrolyte.Type: ApplicationFiled: September 16, 2002Publication date: April 24, 2003Inventors: William James Macklin, Christine Ruth Jarvis
-
Publication number: 20030059683Abstract: Disclosed are compositions prepared by free-radical-driven grafting onto hydrocarbons or hydrocarbon ethers of olefinically unsaturated fluorocarbons containing sulfonyl fluoride, fluorosulfonate, fluorosulfonimide, or fluorosulfonyl methide groups, wherein the grafting step is followed by a hydrolysis step in the case of sulfonyl fluoride.Type: ApplicationFiled: September 25, 2001Publication date: March 27, 2003Inventors: Hanne Anna Katharina Blau, Pui-Yan Lin, Jose Manuel Rodriguez-Parada
-
Patent number: 6537705Abstract: A secondary lithium ion battery, comprising a plurality of laminates (12) each having a separator (7) holding an electrolytic solution to which a positive electrode (1) and a negative electrode (4)are joined with an adhesive resin layer (8) having a mixed phase composed of an electrolytic solution phase (9), a polymer gel phase (10) containing an electrolytic solution, and a polymer solid phase (11).Type: GrantFiled: August 23, 1999Date of Patent: March 25, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kouji Hamano, Hisashi Shiota, Yasuhiro Yoshida, Michio Murai, Takayuki Inuzuka, Shigeru Aihara, Sho Shiraga
-
Patent number: 6534219Abstract: A cathode, an anode and a porous film are first provided. Then, the cathode and anode are aligned with the porous film and a part of the cathode and a part of the anode are fixed to said porous film. Then, the cathode, anode and porous film are immersed in a liquid electrolyte. Finally, the cathode and anode are integrated with the porous film by compression. With this process, it is possible to produce a thin and lightweight polymer secondary battery or other secondary batteries with ease yet at low cost.Type: GrantFiled: February 18, 2000Date of Patent: March 18, 2003Assignee: TDK CorporationInventors: Tsuyoshi Iijima, Toshinobu Miyakoshi, Satoshi Maruyama, Makoto Kobayashi
-
Publication number: 20030044688Abstract: The present invention relates to a polyalkylene oxide based polymer composition for solid polymer electrolytes having superior mechanical properties and ionic conductivity by comprising a cross-linking agent with at least two functional groups of phenyl alkyleneglycol acrylate substitited in core molecules; a softener of polyalkyleneglycol alkylether alkyl(metha)acrylate; a plasticizer of polyalkyleneglycol dialkylether; a initiator and lithium salt thus can be useful as an electrolyte for a high capacity lithium-polymer secondary battery for load leveling or electric vehicles as well as an electrolyte for a small capacity lithium-polymer secondary battery for portable information terminals such as a cellular phone and a notebook computer, and electronic products such as a camcorder.Type: ApplicationFiled: July 3, 2001Publication date: March 6, 2003Applicant: Korea Research institute of Chemical TechnologyInventors: Yongku Kang, Changjin Lee, Seok Koo Kim
-
Publication number: 20030039886Abstract: A modified lithium ion polymer battery, comprising a positive electrode sheet and a negative electrode sheet, formed by blending a binder with positive electrode powder and coating the resulting blend on a copper foil or an aluminum foil used as the collector, wherein said binder can be prepared from the following three components: (a) 0.1 wt %˜95 wt % of polyvinylidene fluoride; (b) 0.1 wt %˜90 wt % of a modified polyacrylates; and (c) 0.Type: ApplicationFiled: August 22, 2001Publication date: February 27, 2003Inventors: Guiping Zhang, Yongyang Yu, Torng Jinn Lee
-
Patent number: 6521382Abstract: Disclosed are a method of preparing a polymer electrolyte composition and a method of manufacturing a lithium secondary battery employing the same. A polymer mixture including a) a polymer mixture including polyvinylidene fluoride-based polymer and b) at least one polymer selected from the group consisting of polyacrylonitrile and polymethyl methacrylate are mixed with a solvent in which a lithium salt is dissolved. The mixing ratio of the polymer mixture and the solvent is 1: 3-10. Thus obtained first mixture is stirred at a room temperature for 1-48 hours. Then, thus obtained second mixture is heated at 60-250° C. for 5 minutes-6 hours while stirring to prepare a polymer electrolyte composition. This composition is coated on at least one substrate selected from a group consisting of a molded film, an anode and a cathode and then dried. The polymer electrolyte has a good mechanical strength and the lithium secondary battery has a stable charge/discharge characteristic and a high capacity.Type: GrantFiled: November 13, 2000Date of Patent: February 18, 2003Assignee: Ness Energy Co., Ltd.Inventors: Jung Min Song, Hee Tak Kim, Sun Wook Kim
-
Publication number: 20030031932Abstract: An electrolyte, which comprises (a) a compound having at least one methylene group adjacent to an oxygen atom in the molecule, (b) a compound represented by the following formula (1), 1Type: ApplicationFiled: September 20, 2001Publication date: February 13, 2003Inventors: Takefumi Okumura, Shin Nishimura, Masaki Akatsuka
-
Publication number: 20030031933Abstract: A polymer electrolyte includes a modified polymeric material, the modified polymeric material including a halogen containing polymer having an enhanced halogen level, the enhanced halogen level relative to a halogen content of the halogen containing polymer formed from polymerization of its monomer. A salt of an alkali metal and an aprotic solvent are also provided. The salt and the aprotic solvent are integrated with the modified polymeric material. The halogen containing polymer is preferably polyvinylchloride (PVC) obtained by emulsion or suspension polymerization of vinylchloride. A method for preparing solid polymer electrolytes includes the steps of providing a halogen containing polymer, halogenating the halogen containing polymer, wherein an enhanced halogen containing modified polymer material results. The enhanced halogen level is relative to the halogen content of the halogen containing polymer formed from polymerization of its monomer.Type: ApplicationFiled: January 4, 2002Publication date: February 13, 2003Inventors: Elena M. Shembel, Oleg V. Chervakov, Peter Novak
-
Patent number: 6506523Abstract: A solid-electrolyte secondary battery is provided which comprises a positive electrode, negative electrode and a solid electrolyte provided between the electrodes. The solid electrolyte contains as a matrix polymer a vinylidene fluoride/hexafluoropropylene block copolymer. The film of the block copolymer has a high mechanical toughness and solvent retaining capability. Use of this block copolymer film as the matrix polymer of the solid electrolyte greatly improves the adhesive strength, load characteristic and low-temperature performance. In the block copolymer, the proportion of hexafluoropropylene should preferably be 3 to 7.5% by weight. The molecular weight should preferably be of over 550,000. A block copolymer of over 300,000 in Mw and under 550,000 in Mw is used in combination with the above one.Type: GrantFiled: December 17, 1999Date of Patent: January 14, 2003Assignee: Sony CorporationInventors: Tsuyonobu Hatazawa, Takayuki Kondo, Yukiko Iijima
-
Publication number: 20030008191Abstract: Methods are provided to make acid functional fluoropolymers by: a) dehydrofluorinating a starting fluoropolymer with a dehydrofluorinating agent to form an unsaturated fluoropolymer; b) adding an acidifiable nucleophilic functionalizing agent to a double bond of the unsaturated fluoropolymer; and c) acidifying the added acidifiable function. Acid functional fluoropolymers and ion conducting membranes thereof are also provided, including acid functional fluoropolymer having pendent groups according to the formula: —X—Ar—An, wherein X is selected from O, S or NR, where R is selected from H and C1-C30 alkyl or aryl, which are optionally substituted, wherein Ar is a C6-C30 aromatic group, which is optionally substituted, wherein A is an acidic function or salt thereof, wherein a can be independently chosen to be 1, 2 or 3.Type: ApplicationFiled: July 15, 2002Publication date: January 9, 2003Applicant: 3M Innovative Properties CompanyInventors: Steven J. Hamrock, Naiyong Jing, Shane S. Mao, L. Charles Hardy
-
Publication number: 20030003369Abstract: Graphite sheeting having a thickness of less than 250 micrometers and in-plane conductivity of at least 100 S/cm when employed as a cathode current collector in a lithium or lithium ion cell containing a fluorinated lithium imide or methide electrolyte salt imparts high thermal resistance, excellent electrochemical stability, and surprisingly high capacity retention at high rates of discharge.Type: ApplicationFiled: August 20, 2002Publication date: January 2, 2003Inventor: Hongli Dai
-
Publication number: 20020197521Abstract: A proton conductor mainly contains a carbonaceous material derivative, such as, a fullerene derivative, a carbon cluster derivative, or a tubular carbonaceous material derivative in which groups capable of transferring protons, for example, —OH groups or —OSO3H groups are introduced to carbon atoms of the carbonaceous material derivative. The proton conductor is produced typically by compacting a powder of the carbonaceous material derivative. The proton conductor is usable, even in a dry state, in a wide temperature range including ordinary temperature. In particular, the proton conductor mainly containing the carbon cluster derivative is advantageous in increasing the strength and extending the selection range of raw materials. An electrochemical device, such as, a fuel cell, that employs the proton conductor is not limited by atmospheric conditions and can be of a small and simple construction.Type: ApplicationFiled: June 14, 2002Publication date: December 26, 2002Inventors: Koichiro Hinokuma, Bjorn Pietzak, Constance Gertrud Rost, Masafumi Ata
-
Publication number: 20020197536Abstract: A lithium polymer battery includes a cathode, an anode and a porous separator disposed between the cathode and the anode. A first polymeric electrolyte is positioned on a first surface of the separator in contact with the cathode. A second polymeric electrolyte is positioned on a second surface of the separator layer in contact with the anode. The first and second polymeric electrolytes use host polymers having different pH levels in an aqueous solution extracted using water.Type: ApplicationFiled: April 18, 2002Publication date: December 26, 2002Applicant: SAMSUNG SDI CO., LTD.Inventors: Takaki Mori, Takeshi Koike, Hyung-bok Lee
-
Publication number: 20020192563Abstract: A new type of polymer is described that represents a new composition of matter. This polymer contains alternating electronegative group III-VI elements connected with hydrocarbon or fluorocarbon linkages to form a polyalkyl or polyfluoroalkyl heteroatomic polymer. These polymers can be combined with lithium salts to form a solid polymer electrolyte for use in electrochemical systems such as batteries. These new solid polymer electrolytes exhibit lithium cation diffusion and lithium cation transport numbers that are superior to similar solid polymer electrolytes composed of polyethylene oxide.Type: ApplicationFiled: April 17, 2001Publication date: December 19, 2002Inventors: Robert Scott Morris, Brian Gilbert Dixon
-
Patent number: 6495293Abstract: An organic electrolyte and polymer is provided wherein diffusivity of mobile ions is enhanced; and a lithium primary battery, lithium secondary battery, polymer secondary battery, and electrochemical capacitor, is provided which have increased capacities at a low temperature. A non-aqueous electrolyte and polymer electrolyte, wherein a fluorinated solvent having a fluorinated alkyl group, of which the terminal end structure is an unsymmetrical structure, is mixed with the electrolyte, is provided for use in various applications.Type: GrantFiled: August 24, 2000Date of Patent: December 17, 2002Assignee: Hitachi, Ltd.Inventors: Juichi Arai, Hideaki Katayama, Mitsuru Kobayashi
-
Publication number: 20020187378Abstract: A proton conductor mainly contains a carbonaceous material derivative, such as, a fullerene derivative, a carbon cluster derivative, or a tubular carbonaceous material derivative in which groups capable of transferring protons, for example, —OH groups or —OSO3H groups are introduced to carbon atoms of the carbonaceous material derivative. The proton conductor is produced typically by compacting a powder of the carbonaceous material derivative. The proton conductor is usable, even in a dry state, in a wide temperature range including ordinary temperature. In particular, the proton conductor mainly containing the carbon cluster derivative is advantageous in increasing the strength and extending the selection range of raw materials. An electrochemical device, such as, a fuel cell, that employs the proton conductor is not limited by atmospheric conditions and can be of a small and simple construction.Type: ApplicationFiled: June 14, 2002Publication date: December 12, 2002Inventors: Koichiro Hinokuma, Bjorn Pietzak, Constance Gertrud Rost, Masafumi Ata
-
Publication number: 20020187403Abstract: A proton conductor mainly contains a carbonaceous material derivative, such as, a fullerene derivative, a carbon cluster derivative, or a tubular carbonaceous material derivative in which groups capable of transferring protons, for example, —OH groups or —OSO3H groups are introduced to carbon atoms of the carbonaceous material derivative. The proton conductor is produced typically by compacting a powder of the carbonaceous material derivative. The proton conductor is usable, even in a dry state, in a wide temperature range including ordinary temperature. In particular, the proton conductor mainly containing the carbon cluster derivative is advantageous in increasing the strength and extending the selection range of raw materials. An electrochemical device, such as, a fuel cell, that employs the proton conductor is not limited by atmospheric conditions and can be of a small and simple construction.Type: ApplicationFiled: June 14, 2002Publication date: December 12, 2002Inventors: Koichiro Hinokuma, Bjorn Pietzak, Constance Gertrud Rost, Masafumi Ata
-
Publication number: 20020172850Abstract: A composite polymer electrolyte membrane is formed from a first polymer electrolyte comprising a sulfonated polyarylene polymer and a second polymer electrolyte comprising another hydrocarbon polymer electrolyte. In the first polymer electrolyte, 2-70 mol % constitutes an aromatic compound unit with an electron-attractive group in its principal chain, while 30-98 mol % constitutes an aromatic compound unit without an electron-attractive group in its principal chain. The second polymer electrolyte is a sulfonated polyether or sulfonated polysulfide polymer electrolyte. The composite polymer electrolyte membrane is formed from a matrix comprising the first polymer electrolyte selected from among sulfonated polyarylene polymers and having an ion exchange capacity in excess of 1.5 meq/g but less than 3.0 meq/g, which is supported on a reinforcement comprising the second polymer electrolyte having an ion exchange capacity in excess of 0.5 meq/g but less than 1.5 meq/g.Type: ApplicationFiled: January 22, 2002Publication date: November 21, 2002Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA, JSR CORPORATIONInventors: Yoichi Asano, Masaaki Nanaumi, Nagayuki Kanaoka, Hiroshi Sohma, Nobuhiro Saito, Junji Matsuo, Kohei Goto, Masayuki Takahashi, Yuji Naito, Fusazumi Masaka
-
Publication number: 20020172859Abstract: A polymer electrolyte precursor comprising a VdF-HFP copolymer, a lithium and a plasticizer is used for the preparation of a bellcore-type polymer battery having improved impedence, low-temperature characteristics, cycle life and self-discharge properties.Type: ApplicationFiled: May 9, 2002Publication date: November 21, 2002Inventors: Kwon-Sun Roh, Jong-Hyuk Choi, Dong-Joon Ihm, Jon-Ha Lee
-
Publication number: 20020160270Abstract: A mixture Ia which comprises a composition Ia consisting ofType: ApplicationFiled: April 29, 2002Publication date: October 31, 2002Inventors: Bernd Bronstert, Helmut Mohwald
-
Patent number: 6468698Abstract: To provide a practical thin type lithium ion secondary battery having a excellent safety and charge-discharge properties. A lithium ion secondary battery comprising a positive electrode 1, a negative electrode 4, a separator 7 retaining an electrolytic solution, and an adhesive resin layer 8 which connects said positive electrode 1 and negative electrode 4 to said separator 7, characterized in that said adhesive resin layer 8 comprises a polyvinylidene fluoride and an ionically-conducting polymer compound incorporated therein.Type: GrantFiled: January 27, 1998Date of Patent: October 22, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kouji Hamano, Sei Tsunoda, Yasuhiro Yoshida, Michio Murai, Takayuki Inuzuka, Shigeru Aihara, Hisashi Shiota
-
Publication number: 20020142207Abstract: A solid polymer electrolyte material made of a copolymer comprising a repeating unit based on a fluoromonomer A which gives a polymer having an alicyclic structure in its main chain by radical polymerization, and a repeating unit based on a fluoromonomer B of the following formula (1):Type: ApplicationFiled: December 26, 2001Publication date: October 3, 2002Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Atsushi Watakabe, Takeshi Eriguchi, Toshihiro Tanuma, Yasuhiro Kunisa
-
Publication number: 20020136958Abstract: Ionic gel polymer electrolytes for rechargeable polymer batteries. In preferred forms, a gel polymer precursor electrolyte is formed by dissolving a gelling agent into organic liquid electrolytes, and then gelling the precursor in situ at elevated temperature after pouring it into a battery case that contains a cathode, an anode and a separator. The gel polymer electrolytes exhibit excellent ionic conductivity of up to about 10−2 S/cm and voltage stability for lithium rechargeable batteries.Type: ApplicationFiled: January 17, 2001Publication date: September 26, 2002Inventors: Chi-Kyun Park, Zhiwei Zhang, Lu Ying Sun, Chul Chai
-
Publication number: 20020127474Abstract: A membrane comprising: (a) a hydrophobic matrix polymer, and (b) a hydrophilic non-ionic polymer, wherein the hydrophobic polymer and the hydrophilic polymer are disposed so as to form a dense selectively proton-conducting membrane. The microstructure of such a membrane can be tailored to specific functionality requirements, such as proton conductivity vs. proton selectivity, and selectivity to particular species.Type: ApplicationFiled: January 9, 2001Publication date: September 12, 2002Applicant: E.C.R.-ELECTRO-CHEMICAL RESEARCH LTD.Inventors: Niles A. Fleischer, Joost Manassen, Charles Linder, Nitsa Mazor, Arieh Meitav, Ilia Yakupov
-
Patent number: 6444356Abstract: A secondary battery separator comprises a fibrous core coated with a polymer having improved electrode adhesion properties in unitary laminated construction. Vacuum removal of plasticizer without solvent extraction prevents brittleness and results in microporosity in a thin layer of enhanced ion conductivity.Type: GrantFiled: March 27, 2000Date of Patent: September 3, 2002Inventors: Jackson C. Ma, El-Sayed Megahed, Timothy J. Stachoviak, Shirley A. Craanen, Daniel A. Schneider, Joseph P. Nestler
-
Publication number: 20020119377Abstract: A gel electrolyte in which nonaqueous electrolyte solution obtained by dissolving electrolyte salt containing Li in a nonaqueous solvent is gelled by a matrix polymer including a copolymer as a main component which contains vinylidene fluoride as a monomer unit. The copolymer employed as the matrix polymer is carboxylic acid modified polyvinylidene fluoride into which a structure formed by esterifying a part or all of a carboxyl group, a carboxylic acid or an acetic anhydride structure is introduced. The carboxylic acid modified polyvinylidene fluoride can dissolve and retain therein a solvent of low viscosity having a low boiling point. Therefore, the carboxylic acid modified polyvinylidene fluoride is used as a matrix polymer to improve the ionic conductivity of the gel electrolyte at low temperature. Thus, a low temperature characteristic is improved and a cyclic characteristic and a load characteristic are also improved.Type: ApplicationFiled: June 12, 2001Publication date: August 29, 2002Inventors: Yusuke Suzuki, Mashio Shibuya
-
Publication number: 20020114996Abstract: The present invention relates to mixtures of fluoroalkylphosphate salts and polymers, methods of producing same, and their use in electrolytes, batteries, capacitors, supercapacitors and galvanic cells.Type: ApplicationFiled: November 9, 2001Publication date: August 22, 2002Applicant: Merck GmbHInventors: Michael Schmidt, Frank Ott, Michael Jungnitz, Nikolai Ignatyev, Andreas Kuehner
-
Patent number: 6426165Abstract: Provided are alternative fabrication methods and compositions for an electrochemical cell. The methods and compositions of the present invention are particularly, though not exclusively, applicable to the manufacture of polymer-cased lithium-ion secondary battery cells. Briefly, the present invention provides an electrochemical cell fabrication process wherein a PVDF-based binder specifically selected for its physical and chemical properties, in particular, its high crystallinity, is coated on a porous separator material to form a porous separator. The high crystallinity PVDF of the binder results in improved cell structure and performance.Type: GrantFiled: December 20, 2000Date of Patent: July 30, 2002Assignee: PolyStor CorporationInventors: Fabrice Coustier, Gowri S. Nagarajan, Richard Mank, Richard Bradford
-
Patent number: 6413676Abstract: A dimensionally stable, highly resilient, hybrid copolymer solid-solution electrolyte-retention film for use in a lithium ion battery in one preferred embodiment has a predominantly amorphous structure and mechanical strength despite contact with liquid solvent electrolyte. The film is a thinned (stretched), cast film of a homogeneous blend of two or more polymers, one of which is selected for its pronounced solvent retention properties. A very high surface area inorganic filler dispersed in the blend during formation thereof serves to increase the porosity of the film and thereby enhance electrolyte retention. The film is soaked in a solution of liquid polymer with liquid organic solvent electrolyte and lithium salt, for absorption thereof. Use of a cross-linked liquid polymer enhances trapping of molecules of the electrolyte into pores of the film. The electrolyte film is sandwiched between flexible active anode and cathode layers to form the lithium ion battery.Type: GrantFiled: June 28, 1999Date of Patent: July 2, 2002Assignee: Lithium Power Technologies, Inc.Inventor: M. Zafar A. Munshi
-
Patent number: 6403266Abstract: Disclosed are a polymer electrolyte composition, a method for preparing the same and a lithium secondary battery employing the same. The polymer electrolyte composition comprises a polymer mixture and a solvent in which a lithium salt is disclosed. The polymer mixture includes polyvinylidene fluoride-based polymer and at least one polymer selected from the group consisting of polyacrylonitrile and polymethyl methacrylate. Polyvinylidene fluoride-based polymer which has a good mechanical strength, polymethyl methacrylate polymer which has a good affinity and polyacrylonitrile polymer which has a good adhesiveness to electrodes are utilized. As a result, the mechanical strength and the adhesiveness to the electrodes of the polymer electrolyte can be improved to obtain a lithium secondary battery which has a stable charge/discharge characteristic and a high capacity.Type: GrantFiled: January 18, 2000Date of Patent: June 11, 2002Assignee: Ness Energy Co., Ltd.Inventors: Hee Tak Kim, Kyoung Bae Kim, Sun Wook Kim
-
Patent number: 6395430Abstract: A hybrid polymer electrolyte includes a copolymer matrix of poly(vinyl chloride) and poly(vinylidene chloride) having a plurality of pores, and a solution of an alkali metal salt in an organic solvent entrained in the pores of the copolymer matrix. The pores of the copolymer matrix occupy 10 to 50 volume percent of the hybrid polymer electrolyte.Type: GrantFiled: August 28, 1998Date of Patent: May 28, 2002Assignee: Samsung Display Devices Co., Ltd.Inventors: Jae-phil Cho, Geun-bae Kim, Yong-chul Park
-
Publication number: 20020050054Abstract: A method of manufacturing a lithium secondary cell includes preparing an anode precursor and a cathode precursor by coating current collectors with electrode compositions, each not containing a plasticizer, preparing a separator precursor by coating both sides of a porous polymer film which is not gelled by an electrolytic solution with slurry containing an ion conductive polymer and the plasticizer, laminating the anode and cathode precursors and the separator precursor to prepare a cell precursor, and activating the cell precursor by injecting the electrolytic solution into the cell precursor. In the method of manufacturing method of the lithium secondary cell, the lithium secondary cell can be manufactured without a process of extracting a plasticizer using an organic solvent. Thus, environmental contamination due to plasticizer extraction can be prevented, thereby reducing the manufacturing cost of batteries.Type: ApplicationFiled: May 11, 2001Publication date: May 2, 2002Applicant: Samsung SDI Co., Ltd.Inventor: Hyung-Gon Noh
-
Publication number: 20020048706Abstract: Solid battery components are provided. A block copolymeric electrolyte is non-crosslinked and non-glassy through the entire range of typical battery service temperatures, that is, through the entire range of at least from about 0° C. to about 70° C. The chains of which the copolymer is made each include at least one ionically-conductive block and at least one second block immiscible with the ionically-conductive block. The chains form an amorphous association and are arranged in an ordered nanostructure including a continuous matrix of amorphous ionically-conductive domains and amorphous second domains that are immiscible with the ionically-conductive domains. A compound is provided that has a formula of LixMyNzO2. M and N are each metal atoms or a main group elements, and x, y and z are each numbers from about 0 to about 1. y and z are chosen such that a formal charge on the MyNz portion of the compound is (4-x).Type: ApplicationFiled: May 22, 2001Publication date: April 25, 2002Inventors: Anne M. Mayes, Gerbrand Ceder, Yet-Ming Chiang, Donald R. Sadoway, Mehmet K. Aydinol, Philip P. Soo, Young-Il Jang, Biying Huang
-
Patent number: 6372388Abstract: A solid polymer electrolyte having improved ionic conductivity and adhesion with an electroconductive substrate and also remarkably enhanced heat resistance is formed with a vinylidene fluoride copolymer which contains 50-97 mol. % of vinylidene fluoride monomer and 0.1-5 mol. % of an unsaturated dibasic acid monoester or an epoxy group-containing vinyl monomer and further has been crosslinked, thereby improving the performances of a non-aqueous battery, such as a lithium ion battery.Type: GrantFiled: January 24, 2000Date of Patent: April 16, 2002Assignee: Kureha Kaguka Kogyo Kabushiki KaishaInventors: Takumi Katsurao, Katsuo Horie, Aisaku Nagai, Yukio Ichikawa
-
Patent number: 6361902Abstract: A method for removing HF from a solid electrolyte using alumina is disclosed. The solid electrolyte contains a polymeric matrix, a salt, a solvent, and a toughening agent. The toughening agent may include alumina, silica, zeolite, and metal oxides (e.g., calcium oxide and magnesium oxide), and mixtures thereof. The toughening agent acts as a drying agent to remove excess solvent in the electrolyte. The solid electrolytes have improved mechanical strength and adherence to the anode and cathode.Type: GrantFiled: July 7, 2000Date of Patent: March 26, 2002Assignee: Valence Technology, Inc.Inventors: Ralph Brodd, Benjamin Chaloner-Gill, Milton Neal Golovin, Mark Isaacson, Joseph Lundquist
-
Publication number: 20020034690Abstract: An electrolyte composition comprising a polymer compound formed by polymerizing an ionic liquid crystal monomer containing at least one polymerizable group. Also disclosed are an electrochemical cell, a nonaqueous secondary cell and a photoelectrochemical cell, each comprising the electrolyte composition.Type: ApplicationFiled: January 16, 2001Publication date: March 21, 2002Inventor: Michio Ono
-
Publication number: 20020034691Abstract: The non-aqueous electrolyte secondary battery of the invention comprises the following elements. The non-aqueous electrolyte secondary battery comprises a positive electrode comprising a positive active material, a negative electrode comprising a negative active material, and a porous polymer electrolyte interposed therebetween. The positive electrode, the negative electrode and the polymer electrolyte are fixed to each other. In the non-aqueous electrolyte secondary battery, there is no gap between the electrodes and the porous polymer electrolyte layer. In this arrangement, the migration of lithium ion can be conducted extremely smoothly, giving an excellent high rate discharge performance. Further, a high safety can be provided when the battery is overcharged. It is further preferred that the positive electrode and/or negative electrode comprise therein a polymer which constitutes the polymer electrolyte.Type: ApplicationFiled: July 24, 2001Publication date: March 21, 2002Applicant: JAPAN STORAGE BATTERY CO., LTD.Inventor: Masazumi Segawa
-
Publication number: 20020031703Abstract: A non-aqueous electrolyte secondary battery has a positive electrode having a positive electrode collector, on which a positive electrode active material layer containing a positive electrode active material as a complex oxide of Li and transition metals are formed, and a negative electrode having a negative collector, on which a negative electrode active material layer is formed. The non-aqueous electrolyte secondary battery is a gel or solid non-aqueous electrolyte secondary battery having a battery device in which a positive electrode and a negative electrode are laminated with an electrolyte layer therebetween in a film-state packaging member constructed by metal foil laminated films, and containing a lithium salt, a non-aqueous solvent, and a polymer material. The concentration in mass ratio of a free acid in the electrolyte layer is 60 ppm and less.Type: ApplicationFiled: April 4, 2001Publication date: March 14, 2002Inventors: Fumito Kameyama, Fumiko Hara, Tsuyoshi Sugiyama, Michiko Komiyama
-
Publication number: 20020031710Abstract: Disclosed is an electrolyte capable of obtaining an excellent quality of electrolyte, and a battery using the electrolyte. A battery device in which a positive electrode and a negative electrode are stacked with a separator being interposed therebetween is enclosed inside an exterior member. The separator is impregnated with an electrolyte. The electrolyte contains a high polymer, a plasticizer, a lithium and at least either carboxylic acid or carboxylate. Therefore, when preparing a high polymer by means of polymerization of monomers, the polymerization of monomers can be smoothly processed even if there is a factor for inhibiting reaction such as copper. As a result, the amount of non-reacted monomers remained in the electrolyte can be suppressed to be extremely small. Therefore, decomposition and reaction of monomers are suppressed even after repeating charging/discharging, so that the deterioration in the charging/discharging efficiency and the charging/discharging characteristic can be prevented.Type: ApplicationFiled: May 22, 2001Publication date: March 14, 2002Inventors: Koichiro Kezuka, Takahiro Endo
-
Publication number: 20020028387Abstract: A polymer gel electrolyte comprising a metal salt, a polymer, optionally a plasticizer, characterized in that the polymer comprises a carbon-hydrogen base chain having at least two reactive groups incorporated wherein the reactive groups have different reactivities. The polymer gel electrolyte neutralises a passivating layer in the form of waste products produced in the electrolyte phase by the metal salt and solvents. The decrease in the growth of the passivating layer provides a battery cell with a better effect and a longer life.Type: ApplicationFiled: December 20, 2000Publication date: March 7, 2002Inventors: Patrick Gavelin, Patric Jannasch
-
Patent number: 6352797Abstract: The invention is a high-performance lithium ion secondary battery which needs no firm case so that it is possible to reduce the size and weight and to design the shape freely and yet which secures high structural strength and safety. The method of the invention for forming a lithium ion battery comprises the step of joining a positive electrode (3) having a positive electrode active material layer (32) joined to a positive electrode current collector (31) and a negative electrode (5) having a negative electrode active material layer (52) joined to a negative electrode current collector (51) with an adhesive resin (6) comprising at least partially a plastic resin being present in parts therebetween and the step of deforming the adhesive resin (6). The method achieves simplification and improvement of productivity in forming a lithium ion battery.Type: GrantFiled: November 16, 1999Date of Patent: March 5, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yasuhiro Yoshida, Michio Murai, Takayuki Inuzuka, Kouji Hamano, Hisashi Shiota, Shigeru Aihara, Daigo Takemura, Jun Aragane, Hiroaki Urushibata
-
Patent number: 6350545Abstract: Novel sulfonylinide and sulfonylmethide compounds are described which are useful as conductive salts. Also described is the use of the above compounds in salt form in battery electrolytes, particular salts having mixed perfluorocaron and hydrocarbon groups or having all hydrocarbon groups. The above salts are less expensive to produce and still exhibit excellent conductivity and low corrosivity.Type: GrantFiled: August 25, 1998Date of Patent: February 26, 2002Assignee: 3M Innovative Properties CompanyInventors: Alan David Fanta, Phat tan Pham, Steven Joseph Hamrock