Patent ID: 7074515
Filing Date: 2006-07-11
Classification: H01M,Y02E

Abstract:
1. An electrochemical element comprising: a solid electrolyte membrane composed of a solid electrolyte and possessing a hydrogen ion conductivity; a first electrode formed on one side of said solid electrolyte membrane and functioning as a catalyst and possessing a hydrophilic property; and a second electrode formed on the other side of said solid electrolyte membrane and functioning as a catalyst and possessing a water-repellent property; said first electrode comprising an alloy comprising two metal components, Ti and Pt, which are different in oxidation tendency, and wherein a concentration gradient of the metal component having the higher oxidation tendency exists within the alloy, such that the concentration of the metal component having the higher oxidation tendency increases toward an outer surface of the first electrode, and the outer surface has dispersed thereon hydrophilic particles of an oxide of the metal component having the higher oxidation tendency.