Polymer solid-electrolyte composition and electrochemical cell using the composition

An electrochemical cell consisting of an anode, a layer of a polymer solid-electrolyte composition and a cathode, said composition comprising a resin selected from the group consisting of cationic-exchange resins and anionic-exchange resins, wherein the cationic-exchange resin is selected from the group consisting of perfluorocarbon sulfonic acids, polysulfones, perfluorocarbonic acid and styrene-divinylbenzene sulfonic acid, said resin containing a silica dispersed therein in an amount of 0.01-50 wt. %, based on the weight of the composition, and said silica is selected from the group consisting of particulate silicas having a mean primary particle size of 0.1 .mu.m or less and fibrous silicas having a diameter of 6 .mu.m or less and said composition is used as at least one of said electrolyte in said anode and/or said cathode, or said layer.

A fuel cell having a cathode current collector, a cathode catalyst layer, a layer of a polymer solid-electrolyte composition, an anode catalyst layer and an anode current collector laminate, said catalyst layer supplied with an oxidative gas and anode catalyst layer supplied with a fuel gas, said composition comprising a resin selected from the group consisting of cationic-exchange resins and anionic-exchange resins, wherein the cationic-exchange resin is selected from the group consisting of perfluorocarbon sulfonic acids, polysulfones, perfluorocarbonic acid and styrene-divinylbenzene sulfonic acid, said resin containing a silica dispersed therein in an amount of 0.01-50 wt. %, based on the weight of the composition, and said silica is selected from the group consisting of particulate silicas having a mean primary particle size of 0.1 .mu.m or less and fibrous silicas having a diameter of 6 .mu.m or less, wherein at least one of said cathode catalyst layer, layer of polymer solid-electrolyte composition and anode catalyst layer comprises said silica.