NOVELTY - A paste for use in electrochemical devices comprises an organic polymer matrix and an inorganic electrochemically activated solid material.    USE - The paste (I) is useful for the construction of batteries and electrochromic devices.    ADVANTAGE - The paste (I) produces a flexible layer with good ionic and/or electronic conductivity.    DETAILED DESCRIPTION - A paste(I) for use in electrochemical devices comprises a mixture of (A) a matrix consisting of an organic polymer, its precursors or prepolymer and (B) an electrochemically activated inorganic solid material that is insoluble in the matrix whereby either (a) (I) consists of at least 60 vol.% (B) and (B) is an electrode material and is incorporated into (A) without the addition of a solvent or swelling agent and/or (b) (I) consists of at least 60 vol. % (B) and (B) is producible as an electrode material and is incorporated into (A) containing a plasticizer which is removed using an appropriate solvent and/or (c) (I) additionally contains a further ionic and/or electronic conductor (C) that is present between (A) and (B) as a thin layer.    INDEPENDENT CLAIMS are included for:    (i) a layer (II) consisting of (I) that is either self supporting or applied to a substrate;    (ii) a laminate (III) having electrochemical properties and comprising a layer of (I) containing (B) that is suitable as a positive electrode, a layer of (I) containing (B) that is suitable as a solid electrolyte and a layer of (I) containing (B) that is suitable as a negative electrode;    (iii) a rechargeable electrochemical cell comprising the laminate;    (iv) a process for the production of (I) by the intimate mixing of (A) and (B);    (v) (v) a process for the production of the self supporting layer (II) by cross-linking the polymer components photochemically, by electron beam, by heat or by dipping the layer in a chemical cross-linking agent.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the arrangement.    feeder electrode (1)    intermediate tape (2)    electrode (3)    electrolyte (4)    electrode (5)    intermediate tape (6)    feeder electrode (7)