TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The paste contains 0.05-50, preferably 2-10 wt.% material (C), for improving electrolyte transport and storage. If the solid (B) is an electrode material, it may also contain an additive (D) to increase the conductivity, preferably 2.5-35 wt.% (D) with respect to (B).Preferred Components: The solid (B) is a substance suitable for use as positive or negative electrode material, solid state electrolyte or ionic or electronic conductor between 2 adjacent substances in the device. The material (C) is selected from pumice powder, zeolites, carbon nanotubes, chamotte, silica gel, acetylene black, activated carbon, lamp black, carbon black, carbon of high specific surface area and/or conductivity, fumed silica or kieselguhr. Suitable additives (D) are carbon black and/or graphite, metals and nitrides.Preferred Cells: Inorganic solid (B) is: (a) a positive electrode material selected from lithium cobalt oxide, lithium nickel oxide and/or nickel manganese oxide or a multinary compound and/or substance substituted with magnesium, aluminum or fluorine; (b) an electrolyte material selected from natural lithium salt and minerals, preferably spodumene, beta-eucryptite and petalite, and synthetic lithium salts, preferably containing other cations or main- and sub-group elements; and/or (c) a negative electrode material selected from any modification of carbon, titanium dioxide, titanium disulfide, tungsten dioxide, molybdenum dioxide, lithium titanate, a metal forming alloys with lithium, semiconductor material, oxides, iodides, sulfides, nitrides or heterogeneous mixtures of these.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Plasticizers: Suitable plasticizers used in the matrix (A) are dimethyl sulfoxide; dimethyl, ethyl methyl, diethyl, methyl propyl, ethylene and propylene carbonate; ethylene sulfite; dioxolane; tetrahydrofuran; gamma-butyrolactone; and mixtures of these.    TECHNOLOGY FOCUS - POLYMERS - Preferred Matrix: The matrix consists of natural and/or synthetic polymer(s), preferably a swellable and/or chlorinated or fluorinated polymer, especially polyvinylidene chloride, polyethylene oxide, a polyvinylidene fluoride-hexafluoropropylene copolymer or a mixture containing at least one of these polymers.Preferred Composition: The paste contains 0.05-50, preferably 2-30 wt.% organic polymer. The matrix (A) also contains a plasticizer, preferably in an amount of 0.005-50, especially 5-12, more especially at most 10 wt.% with respect to material (B); and/or a solvent or swelling agent for the polymer, precursor or prepolymer.Preferred Films: The self-supporting or supported film is a flexible film. The film may contain a dissolved electrolyte, which is introduced into the film by dissolution of a plasticizer on the basis of a plasticizer concentration gradient. Laminate: The laminate has (1) a layer in which (B) is a positive electrode material, (2) a layer in which (B) is a negative electrode material and/or (3) a layer in which (B) has solid state electrolyte properties.Preferred Laminate: The laminate also has a layer with positive electrode material as lower drain electrode and a layer with negative electrode material as upper drain electrode. There may also be a thin plastics film containing conducting, metallic or alloy elements for electron transport, between the lower and/or upper drain electrodes and the layer with positive or negative electrode material. In laminates with layers (1), (2) and (3), at least layer (2) also contains a dissolved electrolyte and material (C) may also be a material increasing the conductivity if (B) is suitable as electrode material. After lamination, the laminate is contacted with another swelling agent, preferably propylene carbonate, and then sealed in a suitable material or housing.Preferred Production: (claimed) The flexible film is produced by spraying a film of the paste on a support and drying, preferably in vacuo down to about 10-2 mbar and between ambient temperature and 150 degrees C, especially at 65-80 degrees C, or at ambient pressure and up to 200 degrees C, preferably at about 120 degrees C. The self-supporting film is produced by making a film from the paste, drying, contacting the dried film with a dissolved solid electrolyte, so that it penetrates the film, and then drying between room temperature and about 70-90 degrees C. A self-supporting or supported film suitable as electrolyte layer in electrochemical devices is produced by (a) making a film by solidifying the paste; and (b) impregnating the film, containing no or little plasticizer, with a solution of a suitable electrolyte in a plasticizer, so that it passed into the layer or laminate (partly) as a result of the plasticizer concentration gradient in the film. The laminate is produced by making individual films from pastes and laminating these. Electrochemical devices are produced by making self-supporting or supported films from the pastes, laminating the films to a laminate suitable for electrochemical activation and impregnation with a solution of electrolyte in plasticizer as in step (b) above. Preferred Production: The laminate is contacted with a dissolved solid electrolyte, so that it penetrates the laminate, and then drying between room temperature and about 70-90 degrees C. EXAMPLE - A battery film (negative electrode) for a rechargeable lithium cell was made from a mixture of 6 g highly crystalline graphite (Timcal SLM 44 RTM), 1.5 g acetylene black (battery quality), 0.6 g ethylene carbonate and 1.5 g polyvinylidene fluoride-hexafluoropropylene in about 50 g. The mixture was stirred for not less than 4 hours and heat to 100 degrees C, then cooled and kept at 50 degrees C. At the end of the stirring time, it was thickened, tape-cast to give a film with a dry thickness of 150-200 mum and dried in vacuo over night at 70 degrees C and a final pressure of 1 mbar.