FIELD: chemistry.
SUBSTANCE: claimed invention relates to a ceramic membrane, conducting alkaline cations, in which at least a part of the surface is covered with a layer of an organic cation-conducting polyelectrolyte, which is insoluble and chemically stable in water at basic pH. The invention also relates to an electrochemical device, which includes such membrane, used as a solid electrolyte, which contacts with liquid electrolyte, consisting of a water solution of alkali metal hydroxide.
EFFECT: increase of a battery capacity per weight unit by limitation of water electrolyte volume due to placement of a thin layer of respective polymer on the boundary, between the solid and water electrolyte.
12 cl, 2 dwg
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