Abstract: A mixture Ia which comprises a composition IIa consisting of a) 1 to 95% by weight of a solid III, preferably a basic solid III, having a primary particle size of 5 nm to 20 microns, and b) 5 to 99% by weight of a polymeric mass IV obtainable by polymerizing b1) 5 to 100% by weight, based on the mass IV of a condensation product V of &agr;) at least one compound VI which is capable to react with a carboxylic acid or a sulfonic acid or a derivative thereof or a mixture of two or more thereof, and &bgr;) at least one mole per mole of the compound VI of a carboxylic acid or a sulfonic acid VII which exhibits at least one radically polymerizable functional group, or a derivative thereof or a mixture of two or more thereof and b2) 0 to 95% by weight, based on the mass IV, of a further compound VIII having an average molecular weight (number average) of at least 5000 and having polyether segments in the main or side chain, wherein the proportion by weight of the composition IIa in the mixture Ia is 1 to 100

Abstract: The inventory provides an electrolyte containing silane additive for the lithium-containing electrochemical cells and batteries.

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 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.

Abstract: To provide a battery capable of obtaining an excellent electrolyte and improved characteristics. The battery has a battery device where a positive electrode and a negative electrode are laminated with a separator in-between inside a package member. The electrolyte containing a polymer compound synthesized by polymerizing a monomer is impregnated in the separator. The synthesis of the polymer compound is inhibited by existence of Cu, thereby a negative electrode collector layer consists of foil including a metal (e.g., Ni, Cr, Au), which is not copper and does not form an alloy with lithium, or Cu foil covering the above metal. Therefore, even if the polymer compound is synthesized after fabricating the battery, polymerization can smoothly progress and content of a remained monomer can be reduced. This can prevent deterioration of battery characteristics because decomposition or reaction of the monomer is controlled even if charge and discharge are repeatedly conducted.

Abstract: The present invention is directed to an electrolytic cell and associated process for fabrication, wherein the cell utilizes an intermediate sub-component connecting layer. This layer comprises an electrolyte which, in an at least partially cured state, is at least partially sandwiched between an electrolyte on a first sub-component and an electrolyte on a second sub-component. Prior to full curing of the intermediate sub-component connecting layer, the cell is oriented into a desired product configuration. Once such a configuration is obtained, the intermediate sub-component connecting layer is fully cured to, in turn, maintain the cell in the desired product configuration without concern of misalignment or mechanical degradation between the various sub-components and/or the cell.

Abstract: A solid polymer electrolyte includes a crosslinking agent, a poly(alkylene glycol) alkyl ether alkyl (meth)acrylate, a lithium salt and a curing initiator. The crosslinking agent includes a compound represented by formula (I): wherein A is oxygen, COO, alkyl of C1-4, or a single bond, R is a 6-membered aliphatic, aromatic or heterocyclic group, Ra, Rb and Rc independently are a linear or branched alkyl group of C1-10, Rd, Re and Rf independently are H or a methyl group, and p, q and r independently are an integer of 1 from 20. The poly(alkylene glycol) alkyl ether alkyl (meth)acrylate is represented by formula (II) wherein R1 and R2 independently are a linear or branched aliphatic or aromatic group of C1-10, R3, X, Y, Z independently are H or a methyl group, and p, q and r independently are an integer from 1 to 20.

Abstract: An electrolyte composition which is excellent in durability and charge transport performance, and an electrochemical battery in which deterioration of the charge transport performance with time is minimized, the electrolyte composition including therein a salt which comprises an anion which contains a mesogen group, and an alkyl or alkenyl group having 6 carbons or more in the structure of the anion, and an organic or inorganic cation.

Abstract: 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).

Abstract: The invention relates to sulphonated polyimides, notably of formula (I) The invention also relates to an ion exchange membrane that includes such a polyimide and a fuel cell that includes such a membrane. The membranes of the invention have excellent durability and low cost and the fuel cells can be used, in particular, in electric vehicles.

Abstract: A secondary battery comprises a negative electrode and a positive electrode which oppose each other and an ion conductive member which includes a layered or columnar structure (ion channels) in its matrix and which is sandwiched between the negative electrode and the positive electrode.

Abstract: 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.

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: An electronically insulating proton conductor (C) is adhered or deposited as a film on a dense phase proton permeable material (D) in a thickness such that the composite C/D has a proton conductivity in a preferred intermediate temperature range of 175-550° C. The composite C/D is incorporated in a high temperature electrolyte membrane electrolyte assembly (MEA), which is incorporated into a fuel cell that can operate in this intermediate temperature range. The fuel cell in turn is incorporated into a fuel cell system having a fuel reformer in the flow field of a fuel mixture entering the fuel cell or in a mode where the fuel cell receives fuel from an external reformer.

Abstract: A homogeneous solid polymer alloy electrolyte comprises a total 100 weight % of mixture of (a) from 5 to 90 weight % comprising one of polyacrylonitrile-based (PAN-based) solid polymers and poly(methyl methacrylate)-based (PMMA-based) solid polymers which have superior adhesion and ion conductivity, (b) from 5 to 80 weight % comprising one of poly(vinylidene fluoride)-based (PVdF-based) solid polymers and the PMMA-based solid polymers which have superior compatibility with an organic solvent electrolyte, (c) from 5 to 80 weight % comprising one of poly(vinyl chloride)-based (PVC-based) solid polymers and the PVdF-based solid polymers which have superior mechanical strength. The solid polymer alloy electrolyte has superior ion conductivity, compatibility with an organic solvent and mechanical strength.

Abstract: A solid electrolyte cell in which the state of electrical contact between the solid electrolyte and the layers of active materials of the positive and negative electrodes and the inter-particulate distance in the layers of active materials of the positive and negative electrodes can be optimized to assure superior load characteristics, and a method for manufacturing the cell. The method for manufacturing a solid electrolyte cell includes a step of applying a paint containing an active material and a binder to a current collector to form a layer of an active material, and a step of impregnating a solid electrolyte in the layer of the active material formed by the active material layer forming step. The impregnating step includes applying the paint comprised of the solid electrolyte dissolved in a solvent on the layer of the active material to allow the paint to be permeated into the layer of the active material, and subsequently drying the solvent.

Abstract: A solid electrolyte cell in which oxidative decomposition of electrolyte components is suppressed to maintain the superior cell performance. The solid electrolyte includes a negative electrode 9 having a negative electrode current collector 7 and a negative electrode active material 8, a positive electrode 12 having a positive electrode current collector 10 and a positive electrode active material 11 and a solid electrolyte 13 arranged between the negative electrode 9 and the positive electrode 12 and which is comprised of an electrolyte salt dispersed in a matrix polymer. A diene compound is contained in at least one of the positive electrode 12 and the solid electrolyte 13.

Abstract: A reinforced composite ionic conductive polymer membrane, and a fuel cell with improved efficiency that includes the reinforced composite ionic conductive polymer membrane are provided. The reinforced composite ionic conductive polymer membrane includes a porous support, an ion-exchange polymer that impregnates the porous support; and a reinforcing agent that impregnates the porous support, the reinforcing agent including a moisture retentive material and/or a catalyst for facilitating oxidation of hydrogen.

Abstract: An electrochemical cell using a polymer matrix material includes a polymerization product of one or more monomers selected from the group of water-soluble, ethylenically-unsaturated acids and acid derivatives, and a crosslinking agent. A quantity of water is used for polymerization, such that the polymer material is swelled to a defined volume upon curing. Optionally, a water-soluble or water-swellable polymer and/or a chemical polymerization initiator.

Abstract: A polymer battery which includes a cell assembly having a positive electrode, a negative electrode, and a separator composed primarily of a fluoropolymer is manufactured by impregnating the cell assembly with an electrolyte composition containing (A) an ion-conductive salt, (B) a solvent in which the ion-conductive salt is soluble and (C) a compound having at least two reactive double bonds per molecule, then reacting the component C compound to form a three-dimensional network structure. The polymer battery has a high safety, a good thermal cycling resistance and robust characteristics even when held at an elevated temperature, making it particularly suitable for use as a lithium secondary cell or a lithium ion secondary cell.

Abstract: A lithium secondary battery has high capacity and excellent current characteristics. The lithium battery comprises of a positive electrode, a negative electrode and an electrolyte; a least one of the electrodes contains ceramics particles such as Al2O3 irresponsible for the charge ad discharge reactions of the battery. The presence of the ceramics particles in the electrode leads to a decrease in the internal resistance of the battery because of the enhancement of ion conductivity in the electrode, resulting in higher capacity at high rate discharge of the lithium secondary battery.

Abstract: A solid polymer electrolyte comprises a matrix formed, at least partially, (a) of crosslinked polymer comprising units derived from ethylene oxide and units derived from ethylene oxide substituted with a reactive radical by substitution, at least part of which participates in a crosslinking bond, and (b) of at least an inonizable alkaline salt chelated in said matrix. In addition, a multilayer electrochemical assembly (1) comprises a positive electrode (2) and a current collector (6) of the negative electrode (3) and optionally of its current collector (5), the electrodes being separated by a solid polymer electrolyte (4), as previously described.

Abstract: An electrolyte, such as for a lithium rechargeable cell, is described which contains a pyrazolium cation and may also contain a lithium salt. The lithium salt may be at least one of LiBF4, LiAsF6, LiPF6, and LiTF. The electrolyte, when used in an electrochemical cell, has a charge/discharge capacity and charging efficiency that is superior to the same properties of ionic liquid electrolytes without a pyrazolium cation. Electrochemical cells are also described and contain an anode, a cathode, and the pyrazolium cation electrolyte.

Abstract: Polymer electrolyte composites for alkali metal electrochemical devices which are formed by coating an inert, lightweight, electrically insulating, non-woven glass fiber net which includes a polyvinyl alcohol binder, with a liquid polymer which may be ionically conductive, and curing the polymer to form a solid or semi-solid state electrolyte composite.

Abstract: A non-aqueous electrolyte cell in which the cell capacity is improved and positioning accuracy of external terminals is assured. An unit cell is housed in an exterior packaging material of a laminated film and encapsulated on heat sealing. To elongated positive and negative terminals of the unit cell are electrically connected electrode terminal leads which are exposed to outside of the exterior packaging material as the leads are surrounded by heat fused portions. The unit cell is a wound assembly of the positive and negative electrodes each of which is comprised of a current collector carrying a layer of an active material. The electrode terminal leads are mounted on the current collectors of the positive and negative electrodes in the vicinity of the innermost turn of the wound assembly. In manufacturing the unit cell, the positions of the electrode terminal leads are detected and positioned with respect to the flat winding arbor. The positive and negative electrodes then are wound on the winding arbor.

Abstract: A crosslinked solid polymer electrolyte is prepared by adding a reactive polyalkylene oxide and an inorganic lithium salt to a block-graft copolymer comprising first and second block chains, and subjecting the reactive polyalkylene oxide to crosslinking reaction. The crosslinked solid polymer electrolyte has a high ionic conductivity and can be readily formed into a tough film and is thus suited for use in large-size secondary batteries.

Abstract: In a non-aqueous electrolyte battery using titanium oxide or lithium titanate as a negative electrode material for negative electrode, polymeric electrolyte is interposed between the negative electrode and a positive electrode. If titanium oxide or lithium titanate is used as the negative electrode material for negative electrode and the polymeric electrolyte is interposed between the negative electrode and the positive electrode, the polymeric electrolyte is less liable to be decomposed by catalytic reduction induced by titanium oxide or lithium titanate. This prevents decline in the charge/discharge efficiency which occurs when a non-aqueous electrolyte solution is used. Thus, the non-aqueous electrolyte battery excellent in charge/discharge efficiency is provided.

Abstract: An electrolyte composition is featured that includes a solid, ionically conductive polymer, organically modified oxide particles that include organic groups covalently bonded to the oxide particles, and an alkali metal salt. The electrolyte composition is free of lithiated zeolite. The invention also features cells that incorporate the electrolyte composition.

Abstract: In solid polymer electrolyte having high-durability, comprising a polymer electrolyte material having a hydrocarbon part, a chelate group and an electrolyte group are introduced into the polymer electrolyte material. The chelate group contains a phosphonic acid group, nitrogen, both of nitrogen and a phosphonic acid group (one or more selected from the group consisting of alkylamino monophosphonic acid groups, alkylamino diphosphonic acid groups, dialkylamino monophosphonic acid groups, alkylalkylene diamine triphosphonic acid groups, and alkylimino phosphonic acid groups) or, both of nitrogen and a carboxylic acid group (one or more selected from the group consisting of alkylamino monocarboxylic acid groups, alkylamino dicarboxylic acid groups, dialkylamino monocarboxylic acid groups, alkylalkylene diamine tricarboxylic acid groups, and alkylimino carboxylic acid groups).

Abstract: A polymer electrolyte comprising a polymer, a metal salt and possibly at least one plasticizer or solvent, wherein the polymer is an amphiphilic graft copolymer comprising a backbone carrying hydrophilic and hydrophobic grafts attached to different carbon atoms in the backbone, wherein the hydrophobic grafts are selected from the group of fluorinated chains or alkyl chains having at least 8 carbon atoms

Abstract: An electrochemical device comprising at least one substrate (1, 7), at least one electroconductive layer (2, 6) at least one electrochemically active layer (3, 5) capable of reversibly injecting ions, and an electrolyte (4), wherein the electrolyte (4) is a layer or a multilayer stack comprising at least one layer (4b) made of an ionically conductive material capable of reversibly injecting said ions but whose overall degree of oxidation is maintained essentially constant.

Abstract: A battery excellent in high temperature storage characteristic is presented. It comprises a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode material, a nonaqueous solvent, and an electrolytic solution containing at least one of organic compounds expressed in formula 1 and formula 2. The positive electrode active material has an oxide compound containing a lithium atom, and the negative electrode material has a material capable of storing and releasing a lithium ion. Formula 1 where R1, R2, R3, R4 are individually at least one selected from the group consisting of H, aryl group, and aryl group having a functional group containing a substituent having an electron attracting property, and the number of H is three or less.

Abstract: A polycarbonate electrolyte comprising a polycarbonate membrane matrix and a lithium salt-containing electrolytic solution impregnated into the polycarbonate membrane matrix.

Abstract: The present invention is a grafted polymer electrolyte membrane prepared by first preparing a precursor membrane comprising a polymer which is capable of being graft polymerized, exposing the surface of the precursor membrane to a plasma in an oxidative atmosphere, then graft-polymerizing a side chain polymer to the plasma treated precursor membrane and introducing a proton conductive functional group to the side chain. The resulting grafted polymer electrolyte membrane has excellent stability and performance when used in a proton-exchange membrane fuel cell or for electrolysis of water.

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: This invention relates to an electrical storage device that is comprised of a polymer composition that is capable of storing an electrical charge. The electrical storage device, in one embodiment, can be recharged by light.

Abstract: A high-strength, heat-resistant and high-safety electrolytic-solution-supporting polymer film which can be applied to secondary batteries typified by lithium and lithium ion secondary batteries and which has an ionic conductivity of at least 5×10−4 S/cm at 25° C., a puncture strength of at least 300 g and a mechanical heat resistance of at least 300° C.

Abstract: An electrode for a battery includes an electrode sheet, a lead, and a metal piece. The electrode sheet has a collector, an active material layer formed on the collector, and a lead connecting portion which is configured as an exposed extension of the collector, on both surfaces of which the active material layer is not formed. The lead connecting portion, the lead, and the metal piece are overlapped to and joined to each other. With this configuration, even if a contact area between the lead connecting portion and the lead is small, an electric resistance at the joined portion between the lead connecting portion and the lead becomes small, with a result that it is possible to enhance the strength of the joined portion and to enhance the discharge load characteristic of the battery.

Abstract: The present invention provides a flat cell that employs strip-shaped electrode plates on which an active material layer has been formed by coating paste or by electrolytic deposition on both sides or one side of a core material consisting of a metal foil.

Abstract: A lithium secondary battery having a winding-type electrode assembly and a case accommodating the electrode assembly, and a method of manufacturing thereof. In the lithium secondary battery, ion-conductive polymer is contained in at least one of a hollow portion of the electrode assembly and an inner space of the case other than the hollow portion. The hollow portion and/or the inner space of the case of the electrode assembly is filled with ion-conductive polymer which can consume the heat generated in the battery and which is changed into a gel-state by an electrolytic solution, to dissipate the heat generated in the battery. Accordingly, the explosion of the battery can be suppressed, thereby preventing the reliability and safety of the battery from lowering.

Abstract: A voltage-responsive optical sensing device such as a semiconductor device of a light emitting device and/or liquid crystal device of a sensing apparatus for sensing an excessive charge and/or excessive discharge state of a battery, such as a lithium ion secondary battery is incorporated into an inside of a cell of a cell group to form the battery. For example, with electrodes of the liquid crystal device connected in parallel to the cell and a light beam of an external light source introduced into the liquid crystal device, a photo sensor senses a change in a light-transmissive characteristic of the liquid crystal device so that the state of the cell constituting the battery can be sensed.

Abstract: A solid electrolyte cell in which the state of electrical contact between the solid electrolyte and the layers of active materials of the positive and negative electrodes and the inter-particulate distance in the layers of active materials of the positive and negative electrodes can be optimized to assure superior load characteristics, and a method for manufacturing the cell. The method for manufacturing a solid electrolyte cell includes a step of applying a paint containing an active material and a binder to a current collector to form a layer of an active material, and a step of impregnating a solid electrolyte in the layer of the active material formed by the active material layer forming step. The impregnating step includes applying the paint comprised of the solid electrolyte dissolved in a solvent on the layer of the active material to allow the paint to be permeated into the layer of the active material, and subsequently drying the solvent.

Abstract: A process for conditioning an electrochemical cell comprising the steps of fabricating an electrochemical cell comprising a first electrode, a second electrode, and an electrolyte, associating an additive with the electrochemical cell, elevating the temperature of the electrochemical cell, and cycling the electrochemical cell, and in turn, forming a passivation layer at an interface between one of the electrodes and the electrolyte.

Abstract: A lithium polymer battery is provided. The lithium polymer battery includes a positive electrode plate having a positive electrode current collector and a positive electrode sheet having a positive electrode active material fixed to at least one plane of the positive electrode current collector as a main component, a negative electrode plate having a negative electrode current collector and a negative electrode sheet having a negative electrode active material fixed to at least one plane of the negative electrode current collector as a main component, a separator interposed between the positive electrode plate and the negative electrode plate, for isolating the positive and negative electrode plates from each other, and coating means interposed between the positive electrode current collector and the positive electrode sheet and between the negative electrode current collector and the negative electrode sheet, for increasing the adhesiveness of the current collectors and the sheets.

Abstract: The present invention provides 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 said electrolyte, each electrode comprising a porous layer containing an electrochemically active material and a binder, the method comprising the following steps:

Abstract: The invention relates to an ionically conductive material, to its preparation and to its uses. The material includes at least one ionic compound in solution in an aprotic solvent, chosen from the compounds (1/mM)+[(ZY)2N]−, (1/mM)+[(ZY)3C]− and (1/mM)+[(ZY)2CQ]−, in which Y denotes SO2 or POZ, Q denotes —H, —COZ or Z, each substituent Z independently denotes a fluorine atom or an optionally perfluorinated organic group which optionally contains at least one polymerizable functional group, at least one of the substituents Z denoting a fluorine atom, and M denotes a cation. Application to electrochemical generators, supercapacities, to the doping of polymers and to electrochromic devices.

Abstract: The present invention relates to composite solid polymer electrolyte membranes (SPEMs) which include a porous polymer substrate interpenetrated with an ion-conducting material. SPEMs of the present invention are useful in electrochemical applications, including fuel cells and electrodialysis.

Abstract: The thin film of non-protonic electrolyte comprises the microporous polyolefin film impregnated with an immobilized non-protonic electrolytic solution, where the film is treated to have improved affinity for the non-protonic solution by graft polymerization of the film with a monomer which can dissolve the non-protonic electrolytic solution, coating of the film with terminal-modified polypropylene which can dissolve the non-protonic electrolytic solution or coating of the film with wax which can dissolve the non-protonic electrolytic solution. The electrolyte-immobilized liquid-film conductor comprises the microporous polyolefin film impregnated with an immobilized non-protonic electrolytic solution, where the film contains an electron-conductive substance and is treated to have improved affinity for the non-protonic solution. The thin film of non-protonic electrolyte comprising the microporous polyolefin film gives a polymer battery, such as lithium battery, when combined with an anode and cathode.

Abstract: A non-liquid electrolyte containing electrochemical cell which operates efficiently at room temperature. The cell includes (a) a non-liquid electrolyte in which protons are mobile, (b) an anode active material based on an organic compound which is a source of protons during cell discharge, or an anode active material including a metal whose cation can assume at least two different non-zero oxidation numbers and (c) a solid cathode including a compound which forms an electrochemical couple with the anode. Anode and cathode active materials can be chosen so that the cell has the feature that the electrochemical reactions at the anode and cathode are at least partially reversible. An important feature of the cell is that no thermal activation is required for its operation, therefore, the cell efficiently operates under ambient temperatures.

Abstract: A bulk ionically conductive polymer gel is prepared by dissolving a salt such as lithium trifluoromethanesulphonate (which would provide lithium ion conductors) in an organic compound such as N-formylpiperidine. The organic compound dissolves the salt at 20° C. but is not a solvent at 20° C. though it is at 215° C.) for polyethylene terephthalate. The last-named is a crystallizable polymer which is added in a minor amount at a high temperature to the other components and provides the required mechanical rigidity for the product at lower temperatures.