Abstract: A separator for a Li-ion polymer battery comprised of a plurality of separator layers that are laminated together. The plurality of separator layers including a first layer formed of a first separator material, and a second layer formed of a second separator material, wherein the second layer is compositionally and structurally different from the first layer.

Abstract: A method for manufacturing electrode-separator assemblies for galvanic elements includes hot-lamination at temperatures close to the melting point or softening point of at least a portion of the surface of an electrode or separator to a separator or electrode, respectively.

Abstract: Lithium-ion electrochemical cells include an anode, a cathode and a separator between the anode and cathode, wherein at least one of the anode, cathode and separator includes a polysiloxane coating thereon. Most preferably, the polysiloxane coating is the polymerized reaction product of dimethyl siloxane and tetra(trimethylsiloxy) silane), and is present on the surface in an amount between about 0.05 to about 0.17 mg/cm2. After being coated with the polysiloxane adhesive, the electrodes and separator can easily be attached one to another at ambient temperature by application of pressure using a hand roller or with a laminator, and then subsequently formed into a spiral or stacked structure for placement in a battery cell case.

Abstract: A MEMS-based fuel cell package and method thereof is disclosed. The fuel cell package comprises seven layers: (1) a sub-package fuel reservoir interface layer, (2) an anode manifold support layer, (3) a fuel/anode manifold and resistive heater layer, (4) a Thick Film Microporous Flow Host Structure layer containing a fuel cell, (5) an air manifold layer, (6) a cathode manifold support structure layer, and (7) a cap. Fuel cell packages with more than one fuel cell are formed by positioning stacks of these layers in series and/or parallel. The fuel cell package materials such as a molded plastic or a ceramic green tape material can be patterned, aligned and stacked to form three dimensional microfluidic channels that provide electrical feedthroughs from various layers which are bonded together and mechanically support a MEMS-based miniature fuel cell. The package incorporates resistive heating elements to control the temperature of the fuel cell stack.

Abstract: A non-aqueous electrolyte battery having improved low temperature characteristics and preservation characteristics. The non-aqueous electrolyte battery includes a negative electrode containing a carbon material as a negative electrode active material, a positive electrode containing a positive electrode active material and which is arranged facing the negative electrode and a non-aqueous electrolyte arranged between the negative and positive electrodes. The negative electrode contains a material not doped with lithium and/or not emitting lithium in an amount of not less than 20 wt % and not larger than 40 wt % based on the negative electrode active material.

Abstract: These additives are represented by the following general formula: L—Y—S in which L designates a hydrocarbon radical which serves as lubricating segment; S designates an oligomer segment which serves as solvating segment of metallic salts and Y designates a chemical bond which joins the hydrocarbon radical and the oligomer segment. With these additives there is no more need to subsequently wash the surface of laminated lithium.

Abstract: A process for the production of a non-aqueous electrolyte battery which comprises a polymer layer forming step of forming a polymer layer on one side of at least one of a positive electrode, a negative electrode and a separator and an electricity-generating element preparing step of laminating or winding the positive electrode, the negative electrode and the separator to prepare an electricity-generating element. The process for the production of a non-aqueous electrolyte battery further comprises battery preparing step of receiving the electricity-generating element in a battery case, injecting an electrolyte into the battery case and then hermetically sealing the battery case to prepare a non-aqueous electrolyte battery and a heating and cooling step of heating and cooling the non-aqueous electrolyte battery while the battery case is under pressure.

Abstract: The bipolar electrochemical battery of the invention comprises: a stack of at least two electrochemical cells electrically arranged in series with the positive face of each cell contacting the negative face of an adjacent cell, wherein each of the cells comprises (a) a negative electrode; (b) a positive electrode; (c) a separator between the electrodes, wherein the separator includes an electrolyte; (d) a first electrically conductive lamination comprising a first inner metal layer and a first polymeric outer layer, said first polymeric outer layer having at least one perforation therein to expose the first inner metal layer, said first electrically conductive lamination being in electrical contact with the outer face of the negative electrode; and (e) a second electrically conductive lamination comprising a second inner metal layer and a second polymeric outer layer, said second polymeric outer layer having at least one perforation therein to expose the second inner metal layer, said second electricall

Abstract: A method of manufacturing an electrode for an electrochemical fuel cell is disclosed, comprising providing a sheet of compressed mass of expanded graphite particles having a plurality of perforations defined by walls of the expanded graphite particles, and the perforations passing through the sheet between first and second opposed surfaces of the sheet; coating the sheet with a thermosettable organic resin, said coating step comprising filling a portion of said perforations with the thermosettable organic resin; curing and baking the sheet, and reopening a portion of the filled perforations during the curing and baking step; activating the thermosettable organic resin to form a high surface area carbon on the walls of the perforations; and loading a catalyst onto the high surface area carbon.

Abstract: A flexible thin layer electrochemical cell and a method of using a lamination process for manufacture thereof, the cell having a plurality of layers including a first electrode layer and a second electrode layer with a separator interspersed therebetween and wherein the separator serves as a lead element upon which the other layers are laminated using an adhesive frame mounted on the lead element.

Abstract: A method for producing electrode sheets for electrochemical elements which contain at least one lithium-intercalating electrode which is composed of a mixture of at least two copolymerized fluorized polymers in whose polymer matrix electrochemically active materials which are insoluble in the polymer are finely dispersed, the fluorized polymers are, having being dissolved as a solvent, mixed with electrochemically active materials, the resulting pasty substance is extruded to form a sheet and then laminated with a polyolefin separator, which is provided with a mixture of the two polymers, PVDF-HFP copolymers in each case being used as the polymer, and the proportion of HFP being less than about 8 percent by weight.

Abstract: Method of making Li-intercalateable electrodes for a lithium-ion battery by applying a first film onto a first face of an electrically conductive grid, which film comprises a plurality of Li-intercalateable particles dispersed throughout a mixture of a polymeric binder and a plasticizer for the binder. Thereafter, a film-forming slurry having the same composition as the first film, plus a solvent therefor, is applied to a second face of the grid opposing the first face so as to provide a second film and such that the solvent in the slurry dissolves at least a portion of the first film and promotes solvent bonding of the films with the grid embedded therein. A polymeric backing film defining a separator is used as a manufacturing process aid, thereby eliminating the step of using a carrier film onto which the electrodes are fabricated and stripping off the carrier and discarding the same.

Abstract: Method of making Li-intercalateable electrodes for a lithium-ion battery by applying a first film onto a first face of an electrically conductive grid, which film comprises a plurality of Li-intercalateable particles dispersed throughout a mixture of a polymeric binder and a plasticizer for the binder. Thereafter, a film-forming slurry having the same composition as the first film, plus a solvent therefor, is applied to a second face of the grid opposing the first face so as to provide a second film and such that the solvent in the slurry dissolves at least a portion of the first film and promotes solvent bonding of the films with the grid embedded therein. A polymeric backing film treated with plasma and defining a separator is used as a manufacturing process aid, thereby eliminating the step of using a carrier film onto which the electrodes are fabricated and stripping off the carrier and discarding the same.

Abstract: An alkaline zinc secondary battery in accordance with the present invention comprises a separator layer comprising a gel electrolyte comprising a water absorbent polymer and an alkaline aqueous solution, disposed between a negative electrode comprising at least one selected from the group consisting of zinc and zinc oxide and a positive electrode. Because the separator layer is in a gel form, transfer of zinc ions is limited. Thereby, deformation of the negative electrode and generation of dendrite due to charge and discharge of the battery are substantially inhibited. Moreover, since impurity ions such as nitrate ions become less prone to move, self-discharge of the battery is also inhibited.

Abstract: The present invention relates to an electrochemical element, specifically an electrochemical element with improved energy density comprising stacked electrochemical cells. In order to achieve such objects, the present invention provides an electrochemical element comprising electrochemical cells which are multiply stacked, said electrochemical cells formed by stacking full cells or bicells having a cathode, a separator layer, and an anode sequentially as a basic unit, and a separator film interposed between each stacked cell wherein, said separator film has a unit length which is determined to wrap the electrochemical cells, and folds outward every unit length to fold each electrochemical cell in a Z-shape starting from the electrochemical cell of a first spot to the electrochemical cell of the last spot continuously while the remaining separator film wraps an outer portion of the stacked cell and a method for manufacturing the same.

Abstract: The present invention relates to an electrochemical element, specifically an electrochemical element with improved energy density comprising multiply stacked electrochemical cells. In order to achieve such objects, the present invention provides an electrochemical element comprising electrochemical cells which are multiply stacked, said electrochemical cells formed by stacking full cells having a cathode, a separator layer, and an anode sequentially as a basic unit, and a separator film interposed between each stacked full cell wherein, said separator film has a unit length which is determined to wrap the electrochemical cells and folds inward every unit length to wrap each electrochemical cell starting from the center electrochemical cell to the outermost electrochemical cell continuously.

Abstract: A method for producing a laminated metal ribbon comprises the steps of (a) vapor-depositing a third metal layer on at least one welding surface of a first metal ribbon 4 and a second metal ribbon 5 in a vacuum chamber 1, the third metal being the same as or different from a metal or an alloy of the first and second metal ribbons 4, 5; (b) pressure-welding the first metal ribbon 4 to the second metal ribbon 5; and (c) subjecting the resultant laminate 9 to a heat treatment for thermal diffusion.

Abstract: A lithium secondary battery having a bi-cell type battery cell consisting of an anode plate, a separator fixed to both surfaces of the anode plate and a cathode plate fixed to either outer surface of the separator, wherein the cathode plate includes a cathode current collector, a front cathode sheet fixed to one surface of the cathode current collector, which is adjacent to the anode plate, and a rear cathode sheet fixed to the other surface of the cathode current collector and having a thickness different from that of the front cathode sheet.

Abstract: A lithium polymer battery having a positive electrode including a positive electrode current collector and positive electrode sheets on at least one surface of the positive electrode current collector, the positive electrode sheets having a positive electrode active material layer as a main component, a negative electrode including a negative electrode current collector and negative electrode sheets on at least one surface of the negative electrode current collector, the negative electrode sheets having a negative electrode active material layer as a main component, and a separator interposed between the positive electrode and the negative electrode, for insulating the electrodes from each other. The positive electrode and the negative electrode of the lithium polymer battery each include a plate and are wound with the separator interposed therebetween.

Abstract: A method for fabricating lithium batteries comprising providing a P2O5 drying aid between an exterior surface of a cell laminate and an interior surface of a container in which the cell laminate is sealed. A cell laminate is first formed from a transition metal chalcogenide positive electrode and a carbonaceous negative electrode with an electrolyte-containing separator there between. The cell laminate is then sealed in a container together with the P2O5 drying aid such that P2O5 is available during battery operation to react with moisture generated during charging and discharging of the battery cell.

Abstract: A method for assembling battery element group includes the steps of folding the plates, arranging the positive and negative plates alternately, inserting a plate with one of the polarities into a laminated area of the plate with the other polarity, and providing a separator between the positive and negative plates. This invention improves the producing efficiency, decreases the waste products, and the plates can be integrated and connected with the bar reliably, thus decreases the resistance and increases the high current discharge performance.

Abstract: Membrane electrode assemblies are described that include an ion conductive membrane a catalyst adjacent to the major surfaces of the ion conductive membrane and a porous particle filled polymer membrane adjacent to the ion conductive membrane. The catalyst can be disposed on the major surfaces of the ion conductive membrane. Preferably, the catalyst is disposed in nanostructures. The polymer film serving as the electrode backing layer preferably is processed by heating the particle loaded porous film to a temperature within about 20 degrees of the melting point of the polymer to decrease the Gurley value and the electrical resistivity. The MEAs can be produced in a continuous roll process. The MEAs can be used to produce fuel cells, electrolyzers and electrochemical reactors.

Abstract: The present invention relates to a process for producing an anode for a secondary battery, which is capable to reduce a contact resistance between a sintered material which contains silicon as an anode active material and a current collector. A binder and a solvent are mixed with a silicon-containing anode material to prepare a slurry. A base material made of a foil or mesh of conductive metal is coated with the slurry, and the solvent is removed to form a coated film. The coated film is sintered in a non-oxidizing atmosphere, thereby integrating a sintered material of the coated film with the base material.

Abstract: A positive electrode plate for alkaline storage battery that does not swell very much even after repeated charge-discharge cycles and can be manufactured easily, a method for manufacturing the same, and an alkaline storage battery using the same are provided. A conductive support (nickel foam) and an active material (nickel hydroxide particles) that is supported by the support are provided. An intermediate part of a positive electrode plate has a larger porosity than surface parts thereof.

Abstract: A separator for a Li-ion polymer battery comprised of a plurality of separator layers that are laminated together. The plurality of separator layers including a first layer formed of a first separator material, and a second layer formed of a second separator material, wherein the second layer is compositionally and structurally different from the first layer.

Abstract: An electrochemical cell comprising an electrode assembly in which overlayed electrodes are wound together in a bi-directional fashion yielding a high energy density cell stack with low internal impedance is described. The overlayed electrodes are such that either a single cathode is paired with two anodes or a single anode is paired with two cathodes prior to winding of the cell stack assembly. For example, the electrode assembly is formed by overlapping the two anode electrodes on opposite sides of the cathode electrode across a midportion and then winding the electrode strips bi-directionally about the midportion.

Abstract: An electrochemical cell comprising an electrode assembly in which opposite polarity electrodes are wound together in a bi-directional fashion yielding a high energy density cell stack with low internal impedance is described. Each electrodes is constructed having a slot provided into its width at about a midportion thereof. The slots are brought into registry with each other to form a collapsible X-shaped electrode assembly, which is then bi-directionally folded to provide a wound electrode assembly.

Abstract: A multi layer electrolyte and a secondary cell using the multi layer electrolyte. The multi layer electrolyte comprises a solid electrolyte and other electrolyte such as gel electrolyte and/or electrolytic solution layer laminated on the solid electrolyte. The secondary cell using the multi layer electrolyte includes at least a positive electrode, a negative electrode and the multi layer electrolyte which comprises: a solid electrolyte layer; and at least one electrolyte layers selected from a gel electrolyte layer and an electrolytic solution layer and laminated on the solid electrolyte layer. By this structure, it is possible to use active material dissoluble in electrolytic solution as electrode active material and to realize a cell which can be quickly charged and discharged and which has superior capacity appearance rate and superior charge-discharge cycle characteristics.

Abstract: A method of producing a battery (10) having a cathode current collector (18), a cathode (12), an electrolyte (13), an anode (14), and an anode current collector (16) is disclosed. The method commences with a substrate (11) upon which the layers of battery components are built upon. The substrate is then removed, as by sputtering, and replaced with a cathode current collector.

Abstract: A process for the fabrication of a component or component feature for an electrochemical apparatus including providing a printing medium comprising a rapid curable polymer containing carrier and a powder of a component material precursor, printing one of a uniform layer or a pattern of such printing medium on a substrate, and rapidly curing the curable polymer to form a cured part; and the parts made by this process. A process for the fabrication or a multi-layer cell of an SOFC including providing a printing medium comprising a radiation curable polymer containing carrier and a powder of a component material precursor, printing one of a uniform layer or a pattern of such printing medium on a substrate, and radiation curing the curable polymer to form a cured part; and the parts made by this process. The process can use an ultraviolet light curable polymer binder and electrode material powder in an industrial printer to form a solid fuel cell electrode component.

Abstract: An electrolyte is formulated as a printing ink and laid down by an in-line press for manufacturing printed electrochemical cells. A curing station transforms the electrolyte to perform additional functions such as separating electrodes, preventing leakage, bonding cell layers, and resisting evaporation.

Abstract: A Li-ion battery cell comprising a polymeric matrix positive electrode layer member, a polymeric matrix negative electrode layer member, and an interposed microporous polyolefin separator layer member is laminated into a unitary, flexible cell structure by means of heat and pressure without necessity for applied interlayer adhesive. A primary plasticizer for the electrode member matrix polymer is included in the electrode layer compositions. During the lamination operation, which may be carried out at a moderate-temperature that does not compromise the thermal shutdown capability of the microporous separator, the plasticizer softens the polymer into a thermoplastic adhesive which forms an effective bond to the untreated polyolefin surface in the region of the electrode/separator interface.

Abstract: A non-aqueous secondary battery wherein internal short circuits caused by some kinds of manufacturing processes can be prevented by avoiding the falling of active material particles from end faces of sheet electrodes, and the battery capacity of an electrode plate laminate which can be stored in a battery can of the same size as those of the conventional laminates can be increased without increasing the thickness of the active material layer. In order to realize the features mentioned above, at least one of end face of each of positive electrode active material layers (1b) and negative electrode active material layers (2b) is coated with an aggregation layer of insulating material particles (3F) wherein insulating material particles are bonded with binders. The positive electrode active material layer (1b) is formed in such a size that it may not overhang the negative electrode active material layer (2b) which is paired with the positive electrode active material layer (1b) for a cell layer.

Abstract: A method for manufacturing a prismatic lithium secondary battery having an electrode assembly having a separation film between a positive electrode plate and a negative electrode plate, the method including forming separation films, and positive and negative plates having a narrower width than the separation films, alternately interposing the positive and negative plates between the separation films and stacking the plates and films, hermetically sealing opposite sides of the separation films by heating along a lengthwise direction to form an electrode assembly, and immersing the electrode assembly in an electrolyte solution, putting the assembly into a case, and hermetically sealing the case.

Abstract: 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.

Abstract: Objects of the present invention is to provide a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics.

Abstract: A method for manufacturing a lithium polymer secondary battery includes the steps of fabricating a unit cathode plate, a unit anode plate and a separator each having a plasticizer, extracting each plasticizer from the unit cathode plate, the unit anode plate and the separator and drying the same, stacking the cathode plate and the unit anode plate and interposing the separator therebetween to form a unit battery cell, and impregnating the unit battery cell with an electrolytic solution. Therefore, the battery productivity can be improved. Also, expanded metal or punched metal as well as a foil can be used as cathode and anode current collectors of the lithium polymer secondary battery.

Abstract: A method of manufacturing an organic electrolyte electrochemical cell comprising at least one electrochemical couple made up of two electrodes sandwiching a solid film of porous polymer containing the electrolyte, each electrode comprising a porous layer containing an electrochemically active material and a binder, the method comprising the steps of: a polymer is put into solution in a solvent and the solution is spread in the form of a film on a support; the film of solution is immersed in a volatile non-solvent that is miscible with the solvent in order to precipitate the polymer and the polymer film is dried to eliminate the non-solvent; and the couple made up of the polymer film placed between the electrodes and in contact therewith, and impregnated with the electrolyte, is compressed while being heated to a temperature less than or equal to the temperature at which the polymer film starts to melt so as to obtain incomplete melting of the polymer, the electrodes becoming unseparable after cooling.

Abstract: 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.

Abstract: A process for producing an electrode for a battery, wherein electrode active material layers are firmly formed on both surfaces of a current collector for the electrode. An electrode coating containing an electrode active material, a binder, a solvent and an acid is applied to one surface of an electrode current collector, then dried, and the other surface of the current collector is cleaned with water, and the electrode active material layer is formed on the other surface of the current collector.

Abstract: A battery cell manufacturing apparatus comprises a vacuum indexing conveyor for vertically suspending an anode material web, wherein a die punch is used to form a discrete anode from the anode material web. A pick and place mechanism is operable with the die punch for positioning the discrete anode between first and second separator webs for subsequent lamination. A laminator vertically receives the separator webs suspended for longitudinally extending them a force of gravity for smoothing out web surfaces adjacent the discrete anode carried therebetween prior to lamination of the separator webs to the discrete anode. A cathode assembly section includes a vacuum conveyor for guiding cathode material webs and vertically suspending them for die punching discrete cathodes which are then placed onto exposed outside surfaces of the vertically suspended separator webs in alignment with the anode laminated therewith.

Abstract: In a nonaqueous-electrolyte secondary battery, it prevents short circuit between a positive electrode and a negative electrode even if pressure from the outside, or stress generated by folding is applied thereon, during the battery is manufactured, or when the battery is used as a product. In the lithium ion battery comprising a laminating structure, in which the positive electrode, gel-type macromolecular solid electrolyte layers in the positive electrode, separators, gel-type macromolecular solid electrolyte layers in the negative electrode, the negative electrode are laminated, two covering members are provided in ends of the positive electrode and the negative electrode, two pair of covering members are provided in a position on one electrode in either one of the positive electrode or the negative electrode oppose to the positions, in which the two covering members are provided.

Abstract: The present invention relates to a method for producing a lithium secondary battery and more particularly, to a method for producing a lithium secondary battery comprising steps of unwinding a separation film for insulating electrodes by a roller, simultaneously coating an adhesive by an air injector on both surfaces of the separation film at regions where cathode plates and anode plates are to be attached to the separation film, simultaneously bonding the cathode plates and the anode plates respectively on the surfaces of the separation film while allowing the electrode plates on each surface of the separation film to be uniformly spaced apart from one another, laminating the bonded cathode plates and anode plates, and laminating the separation film bonded with the cathode plates and the anode plates so that the cathode plates and the anode plates are arranged alternately. According to the present invention, a lithium secondary battery can be made readily and efficiently.

Abstract: A method of making a laminated multi-layer electrochemical cell device structure comprising positive and negative electrode layer members of polymeric matrix composition having a microporous polyolefin membrane separator member interposed therebetween wherein the separator membrane includes a polymer coating layer. The separator is treated to provide a deposited coating of a primary plasticizer for the polymer coating layer. The device electrode and separator members are then assembled and laminated at a compressive force and temperature at which the plasticizer film softens the polymer coating of the separator member sufficiently to establish a strong interfacial bond with the matrix polymers of the electrode members and thereby form a laminated unitary cell structure. In another embodiment, the primary plasticizer comprises a component of the electrode polymeric matrix compositions.

Abstract: Objects of the present invention is to provide a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics.

Abstract: A membrane electrode assembly is provided comprising an ion conducting membrane and one or more electrode layers that comprise nanostructured elements, wherein the nanostructured elements are in incomplete contact with the ion conducting membrane. This invention also provides methods to make the membrane electrode assembly of the invention. The membrane electrode assembly of this invention is suitable for use in electrochemical devices, including proton exchange membrane fuel cells, electrolyzers, chlor-alkali separation membranes, and the like.

Abstract: Provided are methods of forming an electrode suitable for use in an electrochemical cell, and novel electrodes which can be formed therefrom. The methods involve the steps of: (a) forming an electrode slurry from components comprising a solvent, a polymeric binder material and a solid electrode material, wherein the polymeric binder material is formed by modifying a polyolefin with at least one unsaturated polycarboxylic acid or an anhydride of the acid, chlorinating the modified polyolefin and partially crosslinking carboxyl groups or acid anhydride groups on the chlorinated, modified polyolefin with an epoxy group of a compound which has at least two epoxy groups per molecule; (b) coating the electrode slurry on a substrate; and (c) evaporating the solvent. Also provided are electrochemical cells which include the inventive electrodes. The invention has particular applicability to the manufacture of nonaqueous electrochemical power supplies.

Abstract: A method for manufacturing batteries comprises pressing the components of cells with separating plates to form the cells in batteries. Under the conditions of proper pressure, temperature and press time, the present invention provides a method that can rapidly make large-area cells with stable quality. The advantages of the present invention are the mass production of batteries with stable quality and the dramatic increase in the efficiency of production; that is, the present invention reaches both objects of both high yields and low costs in production.

Abstract: Disclosed is a hybrid electrolyte comprising a shaped porous polymer structure comprising a polymer matrix and a plurality of cells dispersed in the polymer matrix, the polymer matrix containing a crosslinked polymer segment and having a gel content in the range of from 20 to 75%, wherein the shaped porous polymer structure is impregnated and swelled with an electrolytic liquid. A method for producing the hybrid electrolyte and a method for producing an electrochemical device comprising the hybrid electrolyte are also disclosed. The hybrid electrolyte of the present invention has a high ionic conductivity, an excellent stability under high temperature conditions and an excellent adherability to an electrode. Further, by the method of the present invention, the hybrid electrolyte having the above-mentioned excellent properties and an electrochemical device comprising such a hybrid electrolyte can be surely and effectively produced.

Abstract: A method for producing an electrolyte membrane for a polymer electrolyte fuel cell, which comprises forming into a membrane a mixture of a perfluorocarbon polymer having sulfonic acid groups or their precursors and a fluorocarbon polymer which can be fibrillated, laminating a support membrane for stretching to at least one side of the resulting membrane, and stretching the resulting laminated membrane under heating.