Electrochemical device having a solid alkaline ion-conducting electrolyte and an aqueous electrolyte

摘要

The present invention relates to an alkaline cation-conducting ceramic membrane covered, over at least a portion of the surface thereof, with a cation-conducting organic polyelectrolyte layer that is insoluble and chemically stable in pH-basic water. The invention also relates to an electrochemical device including such a membrane as a solid electrolyte in contact with a liquid electrolyte formed of an alkali metal hydroxide aqueous solution.

主权项

1. An electrochemical device comprising:
a solid, ceramic membrane electrolyte a liquid aqueous solution of alkali-metal hydroxide electrolyte, wherein the ceramic membrane electrolyte is from 30 μm to 500 μm in thickness, the ceramic membrane electrolyte conducts Li+ ions, at least a first surface of the ceramic membrane covered with an organic cation-conductive halopolymer layer, wherein the ceramic electrolyte membrane does not contact the liquid electrolyte over the entire first surface of the ceramic electrolyte membrane, wherein said halopolymer layer is between 1 and 50 μm in thickness, insoluble and chemically stable in water at a basic pH, in contact with the liquid aqueous solution of alkali metal hydroxide electrolyte.