Abstract: A process for producing a perfluoropolymer, the process including extruding a polymer obtained by polymerizing a perfluoromonomer to prepare strands, and bringing a gas comprising from 3 to 50 volume % of fluorine gas into contact with the strands; the process being conducted on an apparatus that includes an extruder for melting and extruding the polymer obtained by polymerizing a perfluoromonomer, a die having a plurality of pores for preparing the strands from the molten polymer extruded, and a fluorination tank for bringing the gas comprising from 3 to 50 volume % of fluorine gas into contact with the strands.

Abstract: An object of the present invention is to provide an electrolyte membrane-electrode membrane assembly for a solid polymer fuel cell having superior characteristics, wherein a gas diffusion electrode membrane and a solid electrolyte membrane are well bonded, and electrode catalysts are uniformly-dispersed to obtain high electrode activity, a production method thereof and a fuel cell equipped therewith.

Abstract: Provided is a lithium rechargeable battery including: a cathode plate including a cathode current collector layer and a cathode layer; an anode plate spaced from the cathode plate, the cathode plate including an anode current collector layer and an anode layer; and a polymer electrolyte disposed between the cathode plate and the anode plate, wherein at least one of the cathode layer and the anode layer includes a mixed cathode active material or a mixed anode active material.

Abstract: According to this invention, a process for producing fluorine containing polymer to obtain composite polymer electrolyte composition having excellent ion transport number, that is, ion transfer coefficient, for example, excellent transport number of lithium ion, is provided. A process for producing fluorine containing polymer comprising graft-polymerizing a molten salt monomer having a polymerizable functional group and a quaternary ammonium salt structure having a quaternary ammonium cation and anion, with a polymer having the following unit; —(CR1R2—CFX)— X means halogen atom except fluorine atom, R1 and R2 mean hydrogen or fluorine atom, each is same or different atom.

Abstract: An additive for an electrolyte of a lithium secondary battery, the additive including a polysiloxane-based compound represented by Formula 1 below: In formula 1 R1, R2, R3, A1, A2, l, m, n, o and p are as described in the detailed description of the present invention.

Abstract: An electrochemical cell includes an electrolyte membrane containing an ionic conductor. The ionic conductor includes: (a) a cation expressed by one of Formulae (1) and (2): R1R2R3HX+??(1) where, in Formula (1), X indicates any one of N and P, and R1, R2 and R3 each indicate any one of alkyl groups C1 to C18 except a structure in which R1?R2?R3, R1R2HS+??(2) where, in Formula (2), R1 and R2 each indicate any one of alkyl groups C1 to C18 except a structure in which R1?R2; and (b) an anion expressed by Formula (3): R4YOm(OH)n?1O???(3) where, in Formula (3), Y indicates any one of S, C, N and P, R4 indicates any one of an alkyl group and a fluoroalkyl group, and m and n each indicate any one of 1 and 2.

Abstract: High electrical energy density storage devices are disclosed. The devices include electrochemical capacitors, electrolytic capacitors, hybrid electrochemical-electrolytic capacitors and secondary batteries. Advantageously, the energy storage devices may employ core-shell protonated perovskite submicron or nano particles in composite films that have one or more shell coatings on a protonated perovskite core particle, proton bearing and proton conductive. The shells may be formed of proton barrier materials as well as of electrochemically active materials in various configurations.

Abstract: A nonaqueous battery, such as a lithium ion battery, is formed from a polymer electrolyte comprising: a vinylidene fluoride copolymer comprises 90 to 97 wt. % of vinylidene fluoride monomer units and 3 to 10 wt. % of units of at least one monomer copolymerizable with the vinylidene fluoride monomer and has an inherent viscosity of 1.5 to 10 dl/g. The polymer electrolyte stably retains the nonaqueous electrolytic solution in a large amount and has excellent strength in this state.

Abstract: Provided are an electrolyte comprising an amide compound of a specific structure, in which an alkoxy group is substituted with an amine group, and an ionizable lithium salt, and an electrochemical device containing the same. The electrolyte may have excellent thermal and chemical stability and a wide electrochemical window. Also, the electrolyte may have a sufficiently low viscosity and a high ionic conductivity, and thus, may be usefully applied as an electrolyte of electrochemical devices using various anode materials.

Abstract: The invention relates to a paste-like mass that can be used in electrochemical structural elements, including a heterogeneous mixture of (1.) a matrix (A) containing at least one organic polymer, precursors thereof, or prepolymers thereof, and a plasticizer, and (2.) an electrochemically activatable inorganic material in the form of a solid substance (B), the material not being soluble in the matrix and in water, with the proviso that a conductor that is soluble in the plasticizer and that is different from (B) is not present in the mixture, wherein the plasticizer is present in a quantity of up to about 5% by weight, relative to the quantity of the electrochemically activatable material. Self-supporting layers or layers that are placed on a substrate can be prepared from the paste-like mass.

Abstract: A fuel cell comprising a proton transporting membrane is provided. The proton transporting membrane comprises a polyelectrolyte film comprising a multilayer comprising an interpenetrating network of a net positively charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms and a net negatively charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms, and further comprising a fluorinated counterion within the multilayer.

Abstract: A process for producing a polymer electrolyte for a nonaqueous battery by mixing a vinylidene fluoride copolymer and a nonaqueous electrolytic solution with a solvent that can be evaporated, wherein the vinylidene fluoride copolymer comprises 80 to 97 wt. % of vinylidene fluoride monomer units and 3 to 20 wt % of units of at least one monomer copolymerizable with vinylidene fluoride monomer and has an inherent viscosity of 1.5 to 10 dl/g, and evaporating the solvent to form a polymer electrolyte comprising the vinylidene fluoride copolymer impregnated with the nonaqueous electrolytic solution.

Abstract: There is provided a fluorine-containing polymer solid electrolyte which has an excellent ion-conducting property, is high in oxidation resistance, is stable electrochemically and thermally, has sufficient strength and is applicable to various electrochemical devices. The electrolyte comprises (I) a non-crystalline fluorine-containing polymer which has a polar nonionic functional group and has, in a side chain of the polymer molecule, a structural unit D having 1 to 4 units derived from a fluorine-containing ether in the form of continuous chain, (II) an electrolytic compound and as case demands, (III) a solvent. The electrolyte has an ionic conductivity of from 10—10 to 101 S/cm measured at 25° C. by an alternating current complex impedance method, and is useful for various electrochemical devices.

Abstract: Organic electrolyte solutions and lithium batteries using the same are provided. The organic electrolyte solutions use a silane compound that prevents crack formation caused by volumetric changes in the anode active material during battery charging/discharging. This improves charge/discharge characteristics, thereby also improving stability, reliability, and charge/discharge efficiency of the battery.

Abstract: To provide a process for efficiently producing a perfluoropolymer having unstable terminal groups reduced. A process for producing a fluorination-treated perfluoropolymer, which comprises melting a thermoplastic perfluoropolymer to form strands and contacting the polymer strands with a fluorine gas. For fluorination-treatment of the perfluoropolymer, an apparatus 10 is used, which comprises a melt extruder 11 for melting and extruding the perfluoropolymer, a die 12 for forming the melt extruded polymer into continuous strands 1 and a fluorination tank 13 for contacting the continuous strands 1 with a fluorine gas.

Abstract: Embodiments of the present invention relate to apparatuses and methods for fabricating electrochemical cells. One embodiment of the present invention comprises a single chamber configurable to deposit different materials on a substrate spooled between two reels. In one embodiment, the substrate is moved in the same direction around the reels, with conditions within the chamber periodically changed to result in the continuous build-up of deposited material over time. Another embodiment employs alternating a direction of movement of the substrate around the reels, with conditions in the chamber differing with each change in direction to result in the sequential build-up of deposited material over time. The chamber is equipped with different sources of energy and materials to allow the deposition of the different layers of the electrochemical cell.

Abstract: An organic electrolytic solution for a lithium primary or secondary battery includes a lithium salt; an organic solvent; a radical initiator represented by Formula 1 below; and a polymerizable monomer represented by Formula 2 below: R1—N2+X???<Formula 1> wherein R1, R2, R3, R4, and X? are described herein. The organic electrolytic solution improves charge-discharge efficiency and increases cell capacity of the lithium primary or secondary battery.

Abstract: Provided is a lithium secondary battery including a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and a polymer electrolyte composition having a polymer electrolyte, a non-aqueous organic solvent, and a lithium salt. The content of the polymer electrolyte is 9 to 20 wt %, based on the total weight of the polymer electrolyte composition.

Abstract: A novel anode for a lithium battery cell is provided. The anode contains silicon nanoparticles embedded in a solid polymer electrolyte. The electrolyte can also act as a binder for the silicon nanoparticles. A plurality of voids is dispersed throughout the solid polymer electrolyte. The anode may also contain electronically conductive carbon particles. Upon charging of the cell, the silicon nanoparticles expand as take up lithium ions. The solid polymer electrolyte can deform reversibly in response to the expansion of the nanoparticles and transfer the volume expansion to the voids.

Abstract: A solid polymer electrolyte composite for an electrochemical reaction apparatus that possesses satisfactory ion conduction properties and has excellent mechanical strength and heat resistance, is provided. the solid polymer electrolyte composite is characterized in that a solid polymer electrolyte is contained in the continuous pores of an expanded porous polytetrafluoroethylene sheet which has continuous pores and in which the inner surfaces defining the pores are covered with a functional material such as a metal oxide. An electrochemical reaction apparatus containing an electrolyte, wherein said electrochemical reaction apparatus is characterized in that the aforementioned solid polymer electrolyte composite is used as this electrolyte is also provided.

Abstract: An inexpensive and durable polymer electrolyte composition exhibiting high ionic conductivity even in the absence of water or a solvent, characterized by comprising a molten salt and an aromatic polymer having a carbonyl bond and/or a sulfonyl bond in the main chain thereof and containing a cation exchange group. The aromatic polymer is preferably an aromatic polyether sulfone having a specific structural unit and containing a cation exchange group, an aromatic polyether ketone having a specific structural unit and containing a cation exchange group, or an aromatic polyether sulfone block copolymer and/or an aromatic polyether ketone block copolymer, the block copolymers comprising a hydrophilic segment containing a cation exchange group and a cation exchange group-free hydrophobic segment. The polymer electrolyte composition containing the block copolymer as an aromatic polymer exhibits high structural retention even in high temperatures.

Abstract: A battery capable of obtaining a high capacity and reducing its expansion is provided. A spirally wound electrode body formed through laminating a cathode and an anode with a separator and an electrolyte in between to form a laminate and spirally winding the laminate is included in a package member made of an aluminum laminate film. An anode active material layer includes an agglomerated graphite material in which a plurality of primary particles made of graphite having fine pores are agglomerated so that the orientation planes thereof are not parallel to each other, at least in part, to form secondary particles. In the agglomerated graphite material, the total volume of fine pores with a diameter from 10 nm to 1×105 nm inclusive estimated by mercury porosimetry ranges from 0.5 cm3/g to 1.5 cm3/g inclusive per unit weight.

Abstract: A polymer electrolyte for dye sensitized solar cell is provided. The electrolyte contains a porous hybrid polymer (the components were listed in formula (1) and formula (2)) and the electrolyte solution (the components were shown in formula (3)). The weight ratio of PEOPPO to PVDF-HFP is from 1˜80% The weight ratio of EO to PO in PEOPPO is from 30 to 80% EC/PC/LiI/I2/TBP??Formula (3) EC is ethylene carbonate PC is propylene carbonate TBP is 4-tert-butylpyridine The weight ratio of EC to PC is 0.1˜5; the ratio of EC to LiI is 0.1˜2; the ratio of EC to I2 is 0.01˜0.2; the ratio of EC to TBP is 0.1˜1; wherein the range of n and m for PEOPPO is n=20˜150, and m=10˜80.

Abstract: The invention relates to ionic compounds in which the anionic load has been delocalized. A compound disclosed by the invention includes an anionic portion combined with at least one cationic portion Mm+ in sufficient numbers to ensure overall electronic neutrality; the compound is further comprised of M as a hydroxonium, a nitrosonium NO+, an ammonium —NH4+, a metallic cation with the valence m, an organic cation with the valence m, or an organometallic cation with the valence m. The anionic load is carried by a pentacyclical nucleus of tetrazapentalene derivative bearing electroattractive substituents. The compounds can be used notably for ionic conducting materials, electronic conducting materials, colorant, and the catalysis of various chemical reactions.

Abstract: It has long been recognized that replacing the Li intercalated graphitic anode with a lithium foil can dramatically improve energy density due to the dramatically higher capacity of metallic lithium. However, lithium foil is not electrochemically stable in the presence of typical lithium ion battery electrolytes and thus a simple replacement of graphitic anodes with lithium foils is not possible. It was found that diblock or triblock polymers that provide both ionic conduction and structural support can be used as a stable passivating layer on a lithium foil. This passivation scheme results in improved manufacture processing for batteries that use Li electrodes and in improved safety for lithium batteries during use.

Abstract: An electrolyte membrane includes a cross-linked reaction product of a benzoxazine monomer and a cross-linkable compound. The electrolyte membrane is impregnated with 300 to 600 parts by weight of phosphoric acid based on 100 parts by weight of the electrolyte membrane, and has a yield strain 0.5% or less, and a yield stress 0.3 Mpa or less. The cross-linked material has a strong acid trapping ability with respect to the benzoxazine compound and excellent mechanical properties due to a cross-linkage. Also, the solubility of the cross-linked material in polyphosphoric acid is low, thereby showing excellent chemical stability. Accordingly, when the cross-linked material is used, an electrolyte membrane having an excellent liquid supplementing ability and excellent mechanical and chemical stability at a high temperature can be obtained.

Abstract: There is provided a high molecular weight ion conductor which has a high ionic conductivity even around room temperature, is low in a viscosity, is nonflammable, is excellent in oxidation resistance, and can satisfy characteristics required for a solid electrolyte of lithium secondary batteries, a solid electrolyte of capacitors and a solid electrolyte of solar cells. The high molecular weight ion conductor comprises an ion conducting compound (I) and an electrolytic salt (II), and the ion conducting compound (I) is a non-crystalline fluorine-containing polyether compound having a fluorine-containing group in its side chain and a unit dissolving an electrolyte, or a crosslinked product thereof.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a nonaqueous electrolyte, and a separator. The positive electrode includes a lithium composite oxide having an average composition represented by the following formula (1) LixCoyNizM1-y-zOb-aXa??(1) The separator includes a base layer and a polymer resin layer provided on at least one primary surface of the base layer, and the polymer resin layer includes at least one of poly(vinylidene fluoride), poly(vinyl formal), poly(acrylic ester), and poly(methyl methacrylate). In the above formula (1), M indicates at least one element selected of boron, magnesium, aluminum, silicon, phosphorous, sulfur, titanium, chromium, manganese, iron, copper, zinc, gallium, germanium, yttrium, zirconium, molybdenum, silver, strontium, cesium, barium, tungsten, indium, tin, lead, and antimony. X represents a halogen element. X, y, z, a, and b respectively satisfy 0.8<x?1.2, 0?y?1.0, 0.5?z?1.0, 0?a?1.0, and 1.8?b?2.2.

Abstract: Provided is a method of producing a nanoparticle-filled phase inversion polymer electrolyte. The method includes mixing a nanoparticle inorganic filler and a polymer with a solvent to obtain a slurry; casting the obtained slurry to form a membrane; obtaining an inorganic nanoparticle-filled porous polymer membrane by developing internal pores in the cast membrane using a phase inversion method; and impregnating the inorganic nanoparticle-filled porous polymer membrane with an electrolytic solution. The polymer electrolyte produced using the method can be used in a small lithium secondary battery having a high capacity, thereby providing an excellent battery property.

Abstract: The present invention uses a mixture of spherical carbonaceous materials having different average particle sizes as an anode active material in an anode composite mixture layer of an anode. The spherical carbonaceous material of large particle size decreases the reaction with non-aqueous electrolyte solution to suppress the decrease in battery capacity, form clearances having suitable sizes in the anode composite mixture layer, and retain the non-aqueous electrolyte solution. The clearances in the anode composite mixture layer are efficiently filled with the carbonaceous material of small particle size while spaces capable of suitably retaining the non-aqueous electrolyte solution are left unfilled. Thus, the volume density of the anode composite mixture layer is improved and the battery capacity is increased. Accordingly, energy density can be increased without deteriorating battery characteristics.

Abstract: Application: in electric equipment as a secondary current source (storage battery).

Abstract: A polyelectrolyte film is provided, the polyelectrolyte film comprises an interpenetrating network of a net positively charged polymer and a net negatively charged polymer, wherein the net positively charged polymer, the net negatively charged polymer, or both contain polymer repeat units with at least two fluorine atoms.

Abstract: Disclosed is a lithium ion secondary battery including: a positive electrode including a positive electrode active material layer containing a positive electrode active material, and a positive electrode current collector; a negative electrode including a thin film negative electrode active material layer containing an alloy-based negative electrode active material, and a negative electrode current collector; a separator interposed between the positive electrode and the negative electrode; and an ion-permeable resin layer formed on a surface of the thin film negative electrode active material layer. In this lithium ion secondary battery, despite the use of the alloy-based negative electrode active material, the deterioration in battery performance such as cycle characteristics and output characteristics is prevented.

Abstract: There is provided a fluorine-containing polymer solid electrolyte which has an excellent ion-conducting property, is high in oxidation resistance, is stable electrochemically and thermally, has sufficient strength and is applicable to various electrochemical devices. The electrolyte comprises (A) a non-crystalline fluorine-containing polymer having, in a trunk chain and/or side chain of the polymer molecule, a structural unit D having five or more chained units derived from a fluorine-containing ether, (B) an electrolytic compound and (C) a solvent, and has an ionic conductivity of from 10?10 to 101 S/cm measured at 25° C. by an alternating current complex impedance method. The electrolyte is useful for various electrochemical devices.

Abstract: A solid polymer electrolyte composite for an electrochemical reaction apparatus that possesses satisfactory ion conduction properties and has excellent mechanical strength and heat resistance, is provided. The solid polymer electrolyte composite is characterized in that a solid polymer electrolyte is contained in the continuous pores of an expanded porous polytetrafluoroethylene sheet which has continuous pores and in which the inner surfaces defining the pores are covered with a functional material such as a metal oxide. An electrochemical reaction apparatus containing an electrolyte, wherein said electrochemical reaction apparatus is characterized in that the aforementioned solid polymer electrolyte composite is used as this electrolyte is also provided.

Abstract: An object of the present invention is to provide a polymer electrolyte composition ensuring high durability even under high-temperature low-humidification conditions (for example, an operation temperature of 100° C. with 50° C. humidification (corresponding to a humidity of 12 RH %)), and a proton exchange membrane comprising the polymer electrolyte composition. The present invention provides a polymer electrolyte composition comprising (A) a polymer compound having an ion exchange group, (B) a polyphenylene sulfide resin, and at least one resin selected from (C) a polyphenylene ether resin and (D) a polysulfone resin, and a proton exchange membrane comprising the above polymer electrolyte composition.

Abstract: A polymer electrolyte which comprises an ionic liquid (A) and a block copolymer (B) as essential ingredients, which block copolymer (B) comprises one or more of polymer block(s) (P) being compatible with (A) and one or more of polymer block(s) (Q) being incompatible with (A). (A) and (P) mutually dissolve each other to form one phase (X), and (Q) forms a phase (Y) being incompatible with phase (X), and phase (X) and phase (Y) are mutually micro phase separated. The polymer electrolyte of the present invention shows practical ion conductivity, is excellent in retention of ionic liquid, and moreover, is also excellent in heat resistance and mechanical strength.

Abstract: A nonaqueous electrolyte secondary battery is provided. The nonaqueous electrolyte secondary battery includes a cathode; an anode containing at least an anode active material and a conductive agent; and a nonaqueous electrolyte, wherein the anode has an anode mixture, the anode mixture containing 1.5 wt % or more to 10 wt % or less aluminum oxide which has an average particle diameter of 0.1 ?m or more to 5.0 ?m or less.

Abstract: A gel electrolyte and a gel electrolyte battery are provided. The gel electrolyte includes a matrix polymer; a nonaqueous solvent; and an electrolytic solution having an electrolyte salt containing lithium dissolved in the nonaqueous solvent, in which the matrix polymer is swollen with the electrolytic solution. The matrix polymer comprises polyvinylidene fluoride copolymerized with at least hexafluoropropylene in an amount of 3 wt % or more and 7.5 wt % or less. The nonaqueous solvent comprises ethylene carbonate; and at least one solvent selected from the group consisting of dimethyl carbonate, ethylmethyl carbonate, diethyl carbonate, ethylpropyl carbonate, ethyl butyl carbonate, and dipropyl carbonate. The content of the ethylene carbonate in the nonaqueous solvent is 15 wt % or more and 55 wt % or less, and the total content of the at least one solvent in the nonaqueous solvent is 30 wt % or more and 85 wt % or less.

Abstract: The present invention is a microlayer for use with an electrically conductive porous substrate of a gas diffusion layer. The microlayer includes carbon particles and a polymeric composition of first highly-fluorinated polymers that are non-melt processable and second highly-fluorinated polymers that are melt processable.

Abstract: The present invention relates to a composite electrolyte membrane for fuel cells that has high proton conductivity and low fuel permeability even under low humidity conditions and at elevated temperatures. The membrane, comprising a cation exchange resin and acid-treated dendrimers, has great utility in large and medium fuel cells for applications in household appliances, electric vehicles, etc.

Abstract: There is provided a fluorine-containing polymer solid electrolyte which has an excellent ion-conducting property, is high in oxidation resistance, is stable electrochemically and thermally, has sufficient strength and is applicable to various electrochemical devices. The electrolyte comprises (I) a non-crystalline fluorine-containing polymer which has a polar nonionic functional group and has, in a side chain of the polymer molecule, a structural unit D having 1 to 4 units derived from a fluorine-containing ether in the form of continuous chain, (II) an electrolytic compound and as case demands, (III) a solvent. The electrolyte has an ionic conductivity of from 10?10 to 101 S/cm measured at 25° C. by an alternating current complex impedance method, and is useful for various electrochemical devices.

Abstract: The invention relates to a pasty material that can be used in electrochemical components comprising (A) 0-70 percent by weight of a matrix containing at least one organic polymer, its precursors or its prepolymers or consisting thereof; (B) 30-100 percent by weight of inorganic material that can be electrochemically activated and that is preferably nonsoluble in the matrix in the form of a solid substance and optionally a suspending agent for (B). The invention is characterized in that the electrochemically activatable material is at least partially a nanocrystalline powder, with the proviso that material (B) is not a material that can be used as electrode material in the absence of (A). Said material is suitable for producing self-supporting layers or layers placed on a substrate, from which or with which layered composites with electrochemical properties such as accumulators, batteries, condensers (supercaps), solar cells and electrochrome display elements can be produced.

Abstract: A solvent-free polymer electrolyte and a secondary battery employing the electrolyte are provided. The electrolyte includes: a porous film, including a first polymer and a second oligomer, the first polymer being at least one selected from the group consisting of poly (vinylidene fluoride-co-hexafluoropropylene) copolymers, polyvinylidenefluorides, polymethylmethacrylates, polyacrylonitriles, polyethyleneoxides, and celluloses having a polyether chain, and the second oligomer being at least one selected from the group consisting of poly(ethylene oxide-co-ethylene carbonate) copolymers with at least one terminal groups substituted by a halogen atom and polyethyleneglycols with at least one terminal group substituted by a halogen atom. An electrolyte comprising the second oligomer and a lithium salt is present in the pores of the porous film.

Abstract: Provided are a composite polymer electrolyte for a lithium secondary battery in which a composite polymer matrix multi-layer structure composed of a plurality of polymer matrices with different pore sizes is impregnated with an electrolyte solution, and a method of manufacturing the same. Among the polymer matrices, a microporous polymer matrix with a smaller pore size contains a lithium cationic single-ion conducting inorganic filler, thereby enhancing ionic conductivity, the distribution uniformity of the impregnated electrolyte solution, and maintenance characteristics. The microporous polymer matrix containing the lithium cationic single-ion conducting inorganic filler is coated on a surface of a porous polymer matrix to form the composite polymer matrix multi-layer structure, which is then impregnated with the electrolyte solution, to manufacture the composite polymer electrolyte. The composite polymer electrolyte is used in a unit battery.

Abstract: Provided is a polymer composition containing an oxocarbon and a polymer, further, a polymer composition that the oxocarbon are expressed by formula (1).

Abstract: To provide a polymer electrolyte membrane for polymer electrolyte fuel cells, which is less likely to be broken even when it undergoes repetition of swelling in a wet state and shrinkage in a dry state and a membrane/electrode assembly using it. To provide a polymer electrolyte membrane 15 in which the tensile yield stress obtained from the tensile stress-strain curve in accordance with the tensile test according to JIS K 7161-1994 at a temperature of 80° C. at a strain rate of 1/min and by means of an evaluation method according to JIS K 7161-1994, is at most 5.5 MPa; and a membrane/electrode assembly 10 having the polymer electrolyte membrane 15 disposed between an anode 13 and a cathode 14 each having a catalyst layer 11.

Abstract: To provide a polymer electrolyte material for polymer electrolyte fuel cells, which is an electrolyte material having a high ion exchange capacity and a low resistance, and which has a higher softening temperature than a conventional electrolyte material.

Abstract: The invention provides a crosslinkable aromatic resin having a protonic acid group and a crosslinkable group, suitable for electrolytic membranes and binders used in fuel cells, etc., and electrolytic polymer membranes, binders and fuel cells using the resin. The crosslinkable aromatic resin has a crosslinkable group, which is not derived from the protonic acid group and can form a polymer network without any elimination component. This resin exhibits excellent ion conductivity, heat resistance, water resistance, adhesion property and low methanol permeability. Preferably, the crosslinkable group is composed of a C1 to C10 alkyl group directly bonded to the aromatic ring and/or an alkylene group having 1 to 3 carbon atoms in the main chain in which at least one carbon atom directly bonded to the aromatic ring bonds to hydrogen, and a carbonyl group, or a carbon-carbon double bond or triple bond.

Abstract: Provided are a polymeric electrolyte or a nonaqueous electrolyte that can improve a transport rate of charge carrier ions by adding a compound having boron atoms in the structure, preferably one or more selected from the group consisting of compounds represented by the following general formulas (1) to (4), and an electric device such as a cell or the like using the same. wherein R11, R12, R13, R14, R15, R16, R21, R22, R23, R24, R25, R26, R27, R28, R31, R32, R33, R34, R35, R36, R37, R38, R39, R310, R41, R42, R43, R44, R45, R46, R47, R48, R49, R410, R411 and R412 each represent a hydrogen atom, a halogen atom or a monovalent group, or represent groups bound to each other to form a ring, and Ra, Rb, Rc and Rd each represent a group having a site capable of being bound to boron atoms which are the same or different.