Fabrication and Characterization of Anode-supported Solid Oxide Fuel Cell Based on Proton Conductor Electrolyte

Abstract

Proton conducting oxide BaCe0.7Zr0.1Y0.2O3-d (BCZY7) was synthesized by high temperature solid-state reaction method, which crystal structure and microstructure morphology were characterized. The anode-supported button solid oxide fuel cell (SOFC), NiO-BCZY7/BCZY7/La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF)-BCZY7, was fabricated by combining the dip-coating and co-sintering processes. It operated by using H2 (containing 3vol% H2O) as fuel and ambient air as oxidant. The maximum power density of the cell reaches 203, 123 and 92 mW×cm-2 at 600, 550 and 500℃, respectively. However, traditional SOFCs based on (ZrO2)0.92(Y2O3)0.08 electrolyte usually display only tens of milliwatts output per unit area at 600℃. Proton conducting electrolyte greatly improves the low and medium temperature performance of SOFCs and provides a promising solution to reduce SOFCs' operating temperature.