Deposition of Proton Conductive Oxide Thin films on a Porous Substrate for Fuel Cell Applications

Abstract

  An intermediate-temperature (400-600℃) operation of solid oxide fuel cells (SOFCs) is considered to be one of the solutions for reducing a SOFC apparatus cost. In order to achieve this, we proposed to use proton conductive thin films as an electrolyte. As a substrate is required a fuel gas permeability, porous substances are used as substrate, in general. However, this makes depositing solid electrolyte quite difficult. In this paper, we will mention our proposals for avoiding this difficulty. One of our proposals is a direct deposition on a polished porous substrate by liquid-delivery metal-organic chemical vapor deposition (LD-MOCVD). The other is a sol-gel deposition of SZYO thin films on Pd plated porous substrate. Based on these new SOFC structures, we believe we can obtain good SOFC operations in a near future.