High-performance anode for H2S-Air SOFCs

被引:34
作者
Wei, GL [1 ]
Luo, JL [1 ]
Sanger, AR [1 ]
Chuang, KT [1 ]
机构
[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada
关键词
D O I
10.1149/1.1636177
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A high-performance composite anode has been developed for H2S-air solid oxide fuel cells (SOFCs). The anode design is based on the requirements of three-phase boundary theory. The anode material comprises a mixture of composite metal sulfide (Mo-Ni-S) catalyst prepared from MoS2 and NiS (1: 1 weight ratio), admixed with up to 10% each of Ag as electronic conductor and yttria-stabilized zirconia (YSZ) as ionic conductor. The optimum composition is about 90 wt % Mo-Ni-S, 5 wt % Ag, and 5 wt % YSZ. A fuel cell using a 0.2 mm thick YSZ membrane produced a maximum sustainable current density over 480 mA cm(-2) at 750 degreesC and over 800 mA cm(-2) at 850 degreesC, and maximum power density 50 mW cm(-2) at 750 degreesC and over 200 mW cm(-2) at 850 degreesC. (C) 2004 The Electrochemical Society.
引用
收藏
页码:A232 / A237
页数:6
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