Patent ID: 8148436

Claim:
A process for manufacturing an ion/electron-conducting composite polymer membrane, comprising at least two gas-tight ion-conducting polymer portions joined together directly by a gas-tight electron-conducting polymer portion, wherein the process comprises: a) depositing an electron-conductive material in the pores of a porous matrix composed of a polymer and comprising at least two portions intended to be filled with an ion conductor, joined together directly by a portion intended to be filled with an electron-conductive material, this deposition being limited to the portion of the porous matrix intended to be filled with the electron-conductive material; b) applying, to the portion of the porous matrix filled with the electron-conductive material, a treatment for obtaining the softening of the polymer that forms this matrix portion and the blocking of the pores of said matrix portion by deformation of the thus softened polymer; and c) filling, with an ion-conductive material, the porous matrix portions intended to be filled with the ion-conductive material.