Patent ID: 7182848
Filing Date: 2007-02-27
Classification: C04B,C25D,H01M,Y02E,Y02P

Abstract:
1. A method of producing a tubular electrode supported electrochemical fuel cell comprising the sequential steps of: (a) electrophoretically depositing an anodic or cathodic material onto a filament core to create a porous inner electrode layer having a first porosity; (b) depositing a solid electrolyte layer onto the porous inner electrode layer; and (c) drying and sintering the filament core bearing the porous inner electrode layer and the solid electrolyte layer at a temperature and for a length of time sufficient to combust the core and to create a fully dense electrolyte layer while maintaining the porosity of the inner electrode layer; (d) depositing an outer electrode layer, having a second porosity, onto the solid electrolyte layer, which is of an anodic material if the inner layer comprises a cathodic material, or a cathodic material if the inner layer comprises an anodic material; and (e) sintering the porous inner electrode layer, the solid electrolyte layer and the porous outer electrode layer, at a temperature and for a length of time sufficient to bond the outer electrode layer to the solid electrolyte layer while maintaining the porosity of the porous inner electrode layer and the porosity of the outer electrode layer.