H[sub 2]S Poisoning of Solid Oxide Fuel Cells

作者：Kazunari Sasaki, Kyoka Susuki, A. Iyoshi, M. Uchimura, Nobuhiro Imamura, Hajime Kusaba, Yasutake Teraoka, Hiroshi Fuchino, Keigo Tsujimoto, Yoshitaka Uchida, Naoki Jingo · 发表于：Journal of The Electrochemical Society · 年份：2006 · DOI：10.1149/1.2336075 · 被引用次数：273 · 研究领域：Advancements in Solid Oxide Fuel Cells、Fuel Cells and Related Materials、Electrocatalysts for Energy Conversion

The influence of fuel impurity on power generation characteristics of solid oxide fuel cells (SOFCs) has been analyzed by measuring cell voltage at a constant current density, as a function of concentration, operational temperature, and fuel gas composition. Reversible cell voltage change was observed around , while fatal irreversible degradation occurred at a lower operational temperature, at a higher concentration, and at a lower fuel ratio. Sulfur tolerance of SOFCs was improved by using -doped instead of -doped as electrolyte and/or as electrolyte component in the anode cermets. It has been found that poisoning consists of at least two stages, i.e., an initial cell voltage drop within a short time period to a metastable cell voltage, followed by a gradual larger cell voltage drop. Possible poisoning processes are discussed.