(US4810599-A)      A structure consists of A) an electrolyte sheet consisting of a mixt. of an insulating elastomer (IE) and 55-95 vol % inorganic solid electrolyte powder (ISEP) sandwiched between B). 2 electrode sheets each consisting of a mixt. of IE and 75-95 vol. % electrode active substance powder (EASP) opt. together with an ISEP.    Each B) pref. consists of a laminate of numerous layers of the mixt. with the amounts of EASP and ISEP being in stepped ratio and the layer contg. the highest amt. of ISEP being next to A). The ISEP is an Li, Ag, CU, H or Na ion conducting electrolyte powder.r. The Cu ion powder esp. has formula RbCu4I2-xCl3-x, where x is 0.2-0.6. The EASP is a carbonaceous material, metal sulphide or oxide or halide or a metal.    ADVANTAGE -   Thinner cells than previously can be produced with the readily processable structure at high prodn. rates.    (JP93076138-B)      A sandwich structure comprises an electrolyte sheet between a pair of electrode sheets. Each electrode sheet is composed of a mixt. comprising an insulating elastomer (I) and an electrode active substance powder (II) above or in combination with an inorganic solid electrolyte powder (III) dispersed in (I), where (II) and opt. (III) comprise a vol. fraction of 75-95%. The electrolyte sheet is composed of a mixt. comprising (I) and 55-95 vol.% (III) dispersed in (I).    Each electrode sheet is a lamiante of layers of mixts. of (II) and (III) in different mixing ratios which are varied stepwise, with the laminate layer having the highest mixing ratio of (III) being in contact with the electrolyte sheet. (III) is pref. a Li(+), Ag(+), Cu(+), H(+) or Na(+) ion-conductive electrolyte powder, esp. a Cu+ ion-conductive electrolyte powder of formula RbCu4I(2-x)Cl(3+x) (where X = 0.2-0.6). (II) is pref. a carbonaceous material, metal sulphide, metal oxide, metal halide and/or metal.    USE/ADVANTAGE -   Useful in solid electrochemical elements, partic. solid cells, solid electric double layer capacitors, solid electrochromic displays, etc. The structure permits the cells to be made thinner, and has excellent processability and productivity. (J63239775-A)    (EP284104-B1)      A structure comprising a pair of electrode sheets and an electrolyte sheet, said electrolyte sheet being sandwiched in between the pair of electrode sheets, wherein each of the pair of electrode sheets is composed of a mixture comprising an insulating elastomer and an electrode active substance powder in combination with an inorganic solid electrolyte powder, in which mixture the combination of the electrode active substance powder with the inorganic solid electrolyte powder is dispersed in a volume fraction of 75-95% in the insulating elastomer, and said electrolyte sheet is composed of a mixture comprising an insulating elastomer and an inorganic solid electrolyte powder, in which mixture the inorganic solid electrolyte powder is dispersed in the insulating elastomer, and wherein each of the electrode sheets is a laminate of a plurality of layers of mixtures of the electrode active substance powder and the inorganic solid electrolyte powder at different mixing ratios which are varied stepwise, said layers of the mixture being arranged in the order of the mixing ratios, and the laminate layer having the highest mixing ratio of the inorganic electrolyte powder is in contact with the electrolyte sheet.