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Fabrication of composite cathode by a new process for anode-supported tubular solid oxide fuel cells

Authors :
Ting Chen
Xiaofeng Ye
Junliang Li
Minquan Liu
Chun Yuan
Shaorong Wang
You-Peng Chen
Zhongliang Zhan
Source :
Electrochimica Acta. 149:212-217
Publication Year :
2014
Publisher :
Elsevier BV, 2014.

Abstract

Anode-supported tubular solid oxide fuel cells (SOFCs) fabricated by traditional method suffered from the charge exchange constraint on the interface of electrolyte and cathode. In this work, we introduced a new sintering process to obtain the dense and porous electrolyte bi-layer structure on anode-supported tubular SOFCs. The cathode was built by infiltrating nano-catalyst La 0.6 Sr 0.4 Fe 0.9 Sc 0.1 O 3-δ (LSFSc) into the porous electrolyte, which showed better electrochemical activity than traditional LSM cathode. The functional fuel cells showed the maximum power density of 292.3mW·cm −2 at 800 °C with H 2 as fuel and air as oxidant. This unique performance was due to the porous electrolyte provided more specific surface area for cathode and the nanostructured cathode catalyst showed high electro-catalysis for oxygen reduction reaction. Moreover, a long term test was carried out, demonstrating the excellent stability which was extremely important for application in the future.

Details

ISSN :
00134686
Volume :
149
Database :
OpenAIRE
Journal :
Electrochimica Acta
Accession number :
edsair.doi...........e542f3860d9a7ee325526003acfaf5a1