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

Abstract

An intermediate-temperature o C) 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.

Fabrication of highly (110)-oriented BaCeO3-based proton-conductive oxide thin films by RF magnetron sputtering method

“…To realize mass-production-type IT-SOFC at low cost, we propose a new SOFC structure with a proton-conductive thinfilm deposited on a Pd-plated porous stainless-steel (PSS) substrate. 18) The Pd-plated PSS satisfies the hydrogen permeability and mechanical strength that are required for a substrate with a lower Pd content than that of Ito et al's substrate. As a consequence, we can use a variety of thin-film deposition techniques, e.g., sputtering, pulsed laser deposition (PLD), and sol-gel methods, that have lower substrate costs.…”