Patent ID: 7491462
Filing Date: 2009-02-17
Classification: H01M,Y02E,Y02P

Abstract:
1. A fuel cell, comprising: an electrolyte membrane having a substrate formed from a dense hydrogen permeable material and an inorganic electrolyte layer formed on at least one side of the substrate; an oxygen electrode disposed on one side of the electrolyte membrane; an oxidizing gas supply portion that supplies an oxidizing gas to the oxygen electrode; a hydrogen electrode disposed on the other side of the electrolyte membrane; and a fuel gas supply portion that supplies a hydrogen-rich fuel gas to the hydrogen electrode; wherein the substrate permeates the hydrogen in the state of protons or hydrogen atoms and the electrolyte layer has proton conductivity; wherein the substrate made of the hydrogen permeable material includes at least two hydrogen separation membrane layers respectively made of different kinds of metal, and a metal diffusion suppression layer, provided on at least a part of a contact interface between the separation membrane layers of the different kinds of metal, for suppressing diffusion of the different kinds of metal.