Abstract: In a lithium polymer secondary battery comprising: a positive electrode comprising a lithium-containing complex oxide; a negative electrode comprising a material capable of intercalating and deintercalating lithium ions; and a separator interposed between the positive electrode and the negative electrode, the weight Wp of the polymer material constituting the polymer electrolyte contained in the positive electrode, the weight Wn of the polymer material constituting the polymer electrolyte contained in the negative electrode, and the weight Ws of the polymer material constituting the polymer electrolyte contained in the separator satisfy all of the following: Ws<Wn<Wp, 20≦100Wp/(Wp+Wn+Ws)≦50, 20≦100Wn/(Wp+Wn+Ws)≦50, and 20≦100Ws/(Wp+Wn+Ws)≦50; so that a lithium polymer secondary battery which is excellent in cycle stability and high in reliability is provided.

Abstract: A gel composition comprising a reversible gelling agent, an irreversible gelling agent, an electrolyte salt and a solvent for the electrolyte salt; a preparation process for the gel composition which comprises a first step of heating a gel mixture of a reversible gelling agent, an irreversible gelling agent, an electrolyte salt and a solvent for the electrolyte salt to a first temperature region at which the reversible gelling agent functions, to transform the gel into sol and molding the sol into a desired shape; and a second step of heating the sol to a second temperature region at which the irreversible gelling agent functions, to gel irreversibly; and a gel electrolyte composition comprising the above-described gel composition and a process for the preparation thereof. The gel composition can be handled as a solid electrolyte, can be adhered closely with the surface of an electrode and can be used as an electrochemical element in a desired shape.

Abstract: A gelating agent for an alkaline cell is a cross-linked polymer (A) comprising (meth)acrylic acid and/or its alkali metal salt as a main constituent monomer unit and obtained by an aqueous solution polymerization or a reversed phase suspension polymerization and satisfies the following required conditions (1), (2). The gelating agent has good draining property, satisfactorily high speed charging property of the alkaline electrolytic solution and is therefore effective to produce cells with little unevenness of the charging amount of the electrolytic solution and having uniform quality by mass production and an alkaline cell using the gelating agent is provided with durable discharge time and remarkably excellent impact resistance for a long duration.

Abstract: A lithium secondary battery comprises a negative electrode capable of intercalating/deintercalating lithium ion, a positive electrode made of a lithium-containing metal oxide as an active positive material, and a nonaqueous electrolyte, and a polyvinylidene fluoride resin is disposed between said negative electrode and positive electrode so that the battery voltage doesn't rise beyond a predetermined value even when said battery is overcharged.

Abstract: A non-aqueous electrolytic cell having a positive electrode, which has a positive electrode active material layer containing, at least a positive electrode active material; a negative electrode, which has a negative electrode active material layer containing, at least, a negative electrode active material; and an electrolyte, wherein a sulfur compound is added to at least one of the positive electrode active material and/or the negative electrode active material.

Abstract: The present invention provides a lithium secondary battery comprising a cathode electrode containing a lithium complex oxide; an anode electrode containing metal lithium or its alloy, or carbon material; and a nonaqueous organic electrolyte containing a nonaqueous organic solvent, a lithium salt and an aromatic ether that can react to form dimers or polymers above a certain temperature and voltage and that can be expressed by Formula 1 below: wherein, R1 is independently a single bond or an alkylene group with less than or equal to 2 carbons and R2 is hydrogen or an alkyl group with less than or equal to 2 carbons. The lithium secondary battery has the advantage that its characteristics are maintained, even if it is left in its fully charged state at a high temperature for a long time and, at the same time, its reliability and stability have been improved.

Abstract: A uniform gel electrolyte having high durability and use thereof, in particular, batteries or capacitors using such a gel electrolyte.

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: The problem of this invention is based on specifying a process for producing an industrial electrolyte that can be designed in the form of a thixotropic gel in the cells of lead storage batteries, with which large quantities of the liquids needed to fill the lead storage batteries can be prepared and mixed to improve its industrial usability. For the technical solution to this problem, the invention proposes that in the active masses of positive and negative plates in the storage battery cells, the quantity of sulfuric acid necessary to adjust the final acid density of the industrial electrolyte for the ready-to-use storage battery be stored in the form of lead sulfate, while, independently of this, water is set to a pH value from 4.1 to 4.7 by adding an acid and is then mixed with a gel former.

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 lithium ion polymer secondary battery is a laminate of a positive-electrode sheet of a positive-electrode collector foil provided with an active material thereon, a negative-electrode sheet of a negative-electrode collector foil provided with another active material thereon, and a polymer electrolyte layer interposed between the positive-electrode sheet and the negative-electrode sheet. One of the positive-electrode sheet and the negative-electrode sheet is a strip and is fan-folded at least one time so that the positive-electrode sheet is provided on the surface of the active material on the sheet. The other one of the positive-electrode sheet and the negative-electrode sheet consists of a plurality of sheet segments having an area which is the same as the area of each flat portion of the fan-folded sheet. The sheet segments are interposed between the flat portions of the fan-folded sheet so that the polymer electrolyte layer is in contact with the surfaces of the active materials.

Abstract: A gel electrolyte contains at least a gelling agent and a material of high ion conductivity which is liquid at working temperature. The gel electrolyte is stably serviceable for a long period of time, and high in mechanical strength and electroconductivity.

Abstract: To realize constituent elements for realizing a nonaqueous secondary battery having high energy density and high repeating stability, and a nonaqueous secondary battery using the same.

Abstract: The invention concerns an alkaline Ni-Zn battery comprising both anolyte (E) partially or totally in the form of a viscous phase such as a gel, and catholyte (D) optionally in the form of a viscous phase, a microporous separator (A) between the anolyte and the catholyte, the anolyte and the catholyte having different compositions and volume, and an assembly of bipolar elements. The microporous separator is enclosed between impregnated macroporous separators (F) of the anolyte and the catholyte respectively. The total volume of the anolyte and of the catholyte is contained in the porosity of the macroporous separators and in the porosity of the electrodes. The microporous separator is for example based on cellulose or polypropylene. The inventive Ni-Zn battery has good charging/discharging cycles and low plate resistance.

Abstract: A secondary cell exhibiting superior flexibility and cell characteristics. This secondary cell has an anode, a polymer electrolyte layer and an anode, layered together. At least one of the anode and the anode is formed by a sheet-like electrode comprised of a current collector, composed mainly of carbon fibers, and an electrode mixture carried thereon. A metal foil is provided in sliding contact with the sheet electrode on the opposite side of the sheet electrode with respect to the polymer electrolyte layer, and an electrode terminal is taken from said metal foil. The cell device is sealed under a reduced pressure by an exterior member.

Abstract: Described are methods of making electrodes for electrochemical systems, especially cathodes for lithium polymer batteries, and products prepared from the methods; the methods involve the use of a reciprocating extruder, the extrusion of essentially solvent-free systems, or both.

Abstract: A high-molecular gelling agent precursor for an electrolyte comprises a copolymer formed of (A) a hydrophobic monomer having a hydrophobic group, which forms a carboxyl group upon saponification, and (B) a hydrophobic polyfunctional monomer. The saponification product of the copolymer has property to gel the electrolyte. A high-molecular gelling agent for the electrolyte is produced by saponifying the precursor with a saponifying agent selected from the group consisting of acids and alkalis while using a reaction medium selected from the group consisting of water and hydrophobic organic solvents.

Abstract: In a polymer electrolyte battery including a battery element having a cathode and an anode coiled through a polymer electrolyte, a section of the battery element perpendicular to the coiling axis has a curved form. As compared with a polymer electrolyte battery having a flat plate type battery element curved, the former battery has an extremely low possibility of short-circuit at the end of an electrode and excellent battery characteristics.

Abstract: A cathode, an anode and a porous film are first provided. Then, the cathode and anode are aligned with the porous film and a part of the cathode and a part of the anode are fixed to said porous film. Then, the cathode, anode and porous film are immersed in a liquid electrolyte. Finally, the cathode and anode are integrated with the porous film by compression. With this process, it is possible to produce a thin and lightweight polymer secondary battery or other secondary batteries with ease yet at low cost.

Abstract: A solid electrolyte battery is disclosed which is capable of raising an energy density without deterioration of discharge load characteristics thereof, incorporating a wound electrode incorporating a positive electrode incorporating an elongated positive-electrode collector having two sides on which positive-electrode active material layers are formed, a negative electrode incorporating an elongated negative-electrode collector having two sides on which negative-electrode active material layers are formed and a solid electrolyte layer formed between the positive electrode and the negative electrode such that the positive electrode and the negative electrode are laminated and wound, wherein when an assumption is made that the total thickness of a pair of the positive-electrode active material layers formed on the two sides of the collector for the positive electrode is total film thickness A and the total thickness of a pair of the negative-electrode active material layers formed on the two sides of the collec

Abstract: Electric accumulator battery, which comprises a receptacle (1) with cover, of a size which fits in the compartment traditionally reserved for this purpose in a motor vehicle. This receptacle is subdivided internally into a series of cells (2) that are distributed in two or more parallel rows between which are formed intermediate ventilation ducts (3), which are open to the outside through the bottom and the cover.

Abstract: The present invention provides a gel electrolyte cell including a non-aqueous electrolytic solution containing lithium-containing electrolyte salt solved in a non-aqueous solvent and made into a gel state by a matrix polymer, and the gel electrolyte contains vinylene carbonate or derivative thereof in the amount not less than 0.05 wt % and not greater than 5 wt %. This gel electrolyte exhibits an excellent chemical stability with the negative electrode, strength, and liquid-retention characteristic. This gel electrolyte enables to obtain a gel electrolyte cell satisfying the cell capacity, cycle characteristic, load characteristic, and low-temperature characteristic.

Abstract: A solid acid material is used as a proton conducting membrane in an electrochemical device. The solid acid material can be one of a plurality of different kinds of materials. A binder can be added, and that binder can be either a nonconducting or a conducting binder. Nonconducting binders can be, for example, a polymer or a glass. A conducting binder enables the device to be both proton conducting and electron conducting.

Abstract: The present invention provides a lithium battery having improved performance properties and no risk of electrolyte leakage which comprises both a liquid electrolyte and a gel-type electrolyte.

Abstract: A solid electrolyte battery includes a battery element in which a cathode having a cathode composite mixture layer formed by applying a cathode composite mixture on a cathode current collector so as to provide a part to which the cathode composite mixture is not applied at an end part in the longitudinal direction of the cathode current collector and an anode having an anode composite mixture layer formed by applying an anode composite mixture on an anode current collector so as to provide a part to which the anode composite mixture is not applied at an end part in the longitudinal direction of the anode current collector are laminated so as to provide a solid electrolyte layer between the cathode and the anode.

Abstract: Gel-forming battery separators and methods for constructing them. Particles are embedded into pores of a porous support to form a composite. The chemical make-up of surfaces of the particles includes a silanol group. The composite, when contacted with an effective amount of liquid electrolyte, is capable of forming a gelled matrix that includes electrolyte residing within the porous support. Batteries and methods of forming batteries featuring gel-forming separators are also disclosed. No pre-mixing of siliceous material with electrolyte is required facilitating battery construction.

Abstract: In a lead-acid battery, a positive active material includes tin in an amount of from not less than 0.2% to not more than 5% based on the weight thereof. The density of the positive active material after formation is from not less than 3.75 g/cc to not more than 5.0 g/cc. When the lead-acid battery is produced by a battery container formation, a time required between the injection of an electrolyte and the beginning of battery container formation is from not less than 0.1 hours to not more than 3 hours.

Abstract: A gel electrolyte comprised of a non-aqueous electrolytic solution immersed in a matrix polymer, in which ion conductivity of a solvent is improved and superior cyclic characteristics are achieved. To this end, the gel electrolyte includes an electrolyte, a matrix polymer and a non-aqueous solvent. The non-aqueous solvent is a mixed solvent of ethylene carbonate (EC), propylene carbonate (PC) and &ggr;-butyrolactone (GBL). The non-aqueous solvent is of a weight composition in an area in a triangular phase diagram (EC, PC, GBL) surrounded by a point (70, 30, 0), a point (55, 15, 30), a point (15, 55, 30) and a point (30, 70, 0). A gel electrolyte battery employing this electrolyte is also disclosed.

Abstract: A solid-electrolyte battery incorporating an elongated electrode; a positive-electrode lead connected to the positive electrode such that its long side is substantially in parallel with the widthwise direction of the positive electrode and formed into a rectangle-like shape; an elongated negative electrode disposed opposite to the positive electrode; a negative-electrode lead connected to the negative electrode such that its long side is substantially in parallel with the widthwise direction of the negative electrode and formed into a rectangle-like shape; and a solid electrolyte layer formed on at least either surface of the positive electrode and the negative electrode, wherein the positive electrode and the negative electrode are laminated such that the surfaces on each of which the solid electrolyte layer is formed are disposed opposite to each other and wound in the lengthwise direction so as to be accommodated in a case of the solid-electrolyte battery, and a short side of at least either of the positiv

Abstract: A lithium battery includes a negative electrode, a positive electrode, a separator, and a non-aqueous electrolyte solution between the negative and the positive electrodes. At least the negative electrode material and the positive electrode material are provided with a pattern of holes which accommodate a polymeric material which sticks and presses the negative electrode, the positive electrode and the separator together. In order to decrease the tendency of the electrolyte solution to sublime, thereby expanding the packaging material around the battery, the non-aqueous electrolyte solution comprises a solution of lithium salts, solvent molecules and a polymer, forming a gel-electrolyte.

Abstract: A polymer gel electrolyte includes an electrolyte solution composed of a plasticizer with at least two carbonate structures on the molecule and an electrolyte salt, in combination with a matrix polymer. Secondary batteries made with the polymer gel electrolyte can operate at a high capacitance and a high current, have a broad service temperature range and a high level of safety, and are thus particularly well-suited for use in such applications as lithium secondary cells and lithium ion secondary cells. Electrical double-layer capacitors made with the polymer gel electrolyte have a high output voltage, a large output current, a broad service temperature range and excellent safety.

Abstract: The invention provides a method of protecting an ion insertion material from the degradative effects of a liquid or gel-type electrolyte material by disposing a protective, solid ion conducting, electrically insulating, layer between the ion insertion layer and the liquid or gel-type electrolyte material. The invention further provides liquid or gel-type electrochemical cells having improved durability having a pair of electrodes, a pair of ion insertion layers sandwiched between the pair of electrodes, a pair of solid ion conducting layers sandwiched between the ion insertion layers, and a liquid or gel-type electrolyte material disposed between the solid ion conducting layers, where the solid ion conducting layer minimizes or prevents degradation of the faces of the ion insertion materials facing the liquid or gel-type electrolyte material. Electrochemical cells of this invention having increased durability include secondary lithium batteries and electrochromic devices.

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: This invention pertains to separators for electrochemical cells which comprise (i) a microporous pseudo-boehmite layer and (ii) a protective coating layer comprising a polymer; electrolyte elements comprising such separators; electrical current producing cells comprising such separators; and methods of making such separators, electrolyte elements and cells.

Abstract: The invention provides a method of protecting an ion insertion material from the degradative effects of a liquid or gel-type electrolyte material by disposing a protective, solid ion conducting, electrically insulating, layer between the ion insertion layer and the liquid or gel-type electrolyte material. The invention further provides liquid or gel-type electrochemical cells having improved durability having a pair of electrodes, a pair of ion insertion layers sandwiched between the pair of electrodes, a pair of solid ion conducting layers sandwiched between the ion insertion layers, and a liquid or gel-type electrolyte material disposed between the solid ion conducting layers, where the solid ion conducting layer minimizes or prevents degradation of the faces of the ion insertion materials facing the liquid or gel-type electrolyte material. Electrochemical cells of this invention having increased durability include secondary lithium batteries and electrochromic devices.

Abstract: A gel electrolyte and gel-electrolyte battery. The gel electrolyte and gel-electrolyte battery have an improved cycle characteristic and preservation easiness at high temperatures. The gel-electrolyte battery incorporates a positive-electrode mix layer, a negative-electrode mix layer and a gel-electrolyte layer. The gel-electrolyte layer contains a plasticizer which contains lithium salt, a matrix polymer for dispersing the plasticizer and fibrous insolubles. The fibrous insolubles are contained in the gel electrolyte in a quantity not less than 0.1 wt % nor more than 50 wt %. The ratio of the length and diameter of the fibrous insolubles is not less than 10 nor more than 3000. The length of the fibrous insolubles is not less than 10 &mgr;nor more than 1 cm and the diameter of the fibrous insolubles is not less than 0.05 &mgr;m nor more than 50 &mgr;m.

Abstract: The invention provides a polymer gel electrolyte or a binder for use in lithium secondary batteries which comprises a copolymer having in the molecule both a segmented polymer chain (a) having the function of retaining membrane strength and a segmented polymer chain (b) having the function of holding a nonaqueous electrolyte. Also provided is a lithium secondary battery containing the electrolyte.

Abstract: The present invention provides an electrolyte composition, comprising an electrolyte containing at least one kind of an imidazolium salt selected from the group consisting of 1-methyl-3-propyl imidazolium iodide, 1-methyl-3-isopropyl imidazolium iodide, 1-methyl-3-butyl imidazolium iodide, 1-methyl-3-isobutyl imidazolium iodide and 1-methyl-3-sec-butyl imidazolium iodide, a halogen-containing compound dissolved in the electrolyte, and a compound dissolved in the electrolyte and containing at least one element selected from the group consisting of N, P and S, the compound being capable of forming an onium salt together with the halogen-containing compound.

Abstract: A solid electrolyte battery having a high energy density and in which it is possible to prevent internal shorting. The solid electrolyte battery includes a positive electrode, a negative electrode arranged facing the positive electrode and a solid electrolyte layer formed on a surface of at least one of the positive and negative electrodes. The positive and negative electrodes are arranged with the solid electrolyte layer carrying sides facing each other. One of the positive and negative electrodes is smaller in size than the other electrode, while the solid electrolyte layer formed on the electrode smaller in size is formed so as to be larger than the electrode smaller in size.

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 gel electrolyte battery in which adhesion between a layer of an active material of an electrode and a gel electrolyte is raised to provide for sufficient mobility of lithium ions, and a method for the preparation of the gel electrolyte battery. The gel electrolyte battery is comprised of a battery device accommodated in an exterior material of a laminated film and sealed in it on heat fusion. The method for the preparation of the gel electrolyte battery includes a battery device preparation step of layering a positive electrode and a negative electrode via a gel electrolyte to form the battery device, an accommodating step of accommodating the battery device from the battery device preparation step in the laminated film, and a heating step of heating the battery device, accommodated in the laminated film in the accommodating step, under a pressured state.

Abstract: An inorganic compound with a specific inductive capacity not less than 12 is contained in a separator. This improves the degree of ion dissociation of a lithium compound as an electrolytic salt contained in an non-aqueous solvent present in and near voids of pores, while diminishing resistance against ion conduction to improve ion conductivity.

Abstract: Disclosed is a solid electrolyte battery including: a first electrode including a first collector, and a first active material layer formed on one surface of the first collector with an outer peripheral edge portion of the first collector remaining as a collector exposed portion; a second electrode including a second collector and second active material layers formed on both surfaces of the second collector; and a solid electrolyte interposed between the first electrode and the second electrode; wherein the second electrode is held in the first electrode in such a manner that the first active material layer is opposed to each of the second active material layers via the solid electrolyte, and is sealed in the first electrode by joining the collector exposed portion of the first electrode to each other. This battery is allowed to be further thinned and reduced in weight, to be improved in energy density per weight and energy density per volume, and to be enhanced in air-tightness.

Abstract: The problem of this invention is based on specifying a process for producing an industrial electrolyte that can be designed in the form of a thixotropic gel in the cells of lead storage batteries, with which large quantities of the liquids needed to fill the lead storage batteries can be prepared and mixed to improve its industrial usability. For the technical solution to this problem, the invention proposes that in the active masses of positive and negative plates in the storage battery cells, the quantity of sulfuric acid necessary to adjust the final acid density of the industrial electrolyte for the ready-to-use storage battery be stored in the form of lead sulfate, while, independently of this, water is set to a pH value from 2 to 4.7 by adding an acid and is then mixed with a gel former.

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: 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: 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: The present invention is concerned with novel polar solvents and novel electrolytic compositions comprising such solvents, and having a high range of stability, as required for applications in the field of electrochemistry. The present solvents have a highly polar amide function, and preferably combine with a salt soluble in the solvent and having an anion with a delocalized charge, and at least one polymer, to form an electrolytic composition.

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.