The invention is a thin film composite solid (and a means for making such) suitable for use as an electrolyte, having a first layer of a dense, non-porous conductive material; a second layer of a porous ionic conductive material; and a third layer of a dense non-porous conductive material, wherein the...http://www.google.fr/patents/US7255961?utm_source=gb-gplus-shareBrevet US7255961 - Thin film composite electrolyte
