(DE3920129-C)      Electrochemical appts has pair(s) of electrodes and between the electrodes a solid polymer electrolyte in which is dispersed uniformly spherical particles. The polymer electrolyte pref also contains an electrolyte salt. The spherical particles pref have little or no capacity for conducting electrons and may be of a phenol resin, cross-linked divinylbenzene polymer, PMMA, polystyrene, nylon, polyethylene, polyethylene- or polypropylene-oxide.    USE/ADVANTAGE -   Highly reliable for long periods and is useful as a battery or electrochroming appts.    (13pp)    (US5011751-A)      Electrochemical device comprises at least a pair of electrodes and solid or solid-like composite electrolyte interposed between, comprising uniformly spherical particles of flatness ratio 0-5% dispersed in solid or solid-like polymeric composite electrolyte. Pref. spherical particles have no electronic conducting.    USE/ADVANTAGE -   For use as e.g. battery, electrochromic device and container. Device offers high operational reliability for extended period of time. @(10pp)@    (JP3062203-B2)      Electrochemical device has at least one pair of electrodes and a solid or solid-like composite electrolyte (I) between these, which contains uniform spherical particles (II) dispersed in (I).    Pref. (I) consists of a polymer, an electrolyte salt (III) and (II). (II) have (almost) no electrical conductivity, the conductivity being 10 power (-10) S/cm or less but have ion conductivity. They can be produced from phenolic resin, crosslinked DVB polymer, PMMA, polystyrene, nylon, polyethylene, polyethylene oxide, polypropylene oxide, copolymers of ethylene oxide and propylene oxide and polymers contg. one of these copolymers as side chains. Alternatively, (II) consist of inorg. materials, i.e. crown glass, 'Nasicon' (RTM), ''isicon' (RTM), A1203 or Ti02. They have a dia. of 0.1-50 microns. The amt. of (II) in (I) is ca. 0.1-50 vol.%. (III) has an anion of the formula BR4(-)(R=alkyl, phenyl or halogen) and a counter-cation and has a lattice energy of 750 kJ/mole or less and concn. of 0.04 or more as (III) concn./ionic dissociation gp.    USE/ADVANTAGE -   The device is claimed as battery or electrochromic device. It may also be a capacitor. It operates reliably for long periods.