Chemical durability of Solid Oxide Fuel Cells: Influence of impurities on long-term performance

Kazunari Sasaki, Kengo Haga, Tomoo Yoshizumi, Daisuke Minematsu, Eiji Yuki, Runru Liu, Chie Uryu, Toshihiro Oshima, Teppei Ogura, Yusuke Shiratori, Kohei Ito, Michihisa Koyama, Katsumi Yokomoto

研究成果: ジャーナルへの寄稿学術誌査読

153 被引用数 (Scopus)

抄録

Because of the fuel flexibility of Solid Oxide Fuel Cells (SOFCs), various types of fuels may be applied directly or via a simple reforming process, including hydrocarbons, alcohols, coal gas, biogas, besides hydrogen. However, various types of minor constituents in practical fuels and/or from the system components can cause chemical degradation of SOFCs, such as anode and cathode poisoning phenomena. In this study, we compare the influence of various external impurities, including sulfur, chlorine, phosphorus, boron, and siloxane for anodes, and H2O and SO2 for cathodes, on SOFC performance to have a general overview on long-term chemical durability of SOFCs. Chemical compatibility of Ni with foreign species has also been thermochemically considered. Using common model cells, the stability of cell voltage, electrode overpotential, and ohmic loss up to 3000 h has been experimentally examined for H2-based fuels, for hydrocarbon-based fuels, and for partially pre-reformed CH4-based fuels. Increase in degradation rate by impurities was verified for various operational parameters. Impurity poisoning mechanisms are discussed for each specific impurity.

本文言語英語
ページ(範囲)9130-9140
ページ数11
ジャーナルJournal of Power Sources
196
22
DOI
出版ステータス出版済み - 11月 15 2011

!!!All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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