期刊
JOURNAL OF POWER SOURCES
卷 320, 期 -, 页码 180-187出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.04.111
关键词
Solid oxide fuel cell; La-doped SrTiO3; Oxide anode; Redox stability
资金
- Japan Science and Technology Agency (JST) through Center of Innovation Science and Technology based Radical Innovation and Entrepreneurship Program (COI Program)
An anode backbone using 40 wt% (ZrO2)0.89(Sc2O3)(0.1)(CeO2)(0.01) (SSZ)-Sr0.9La0.1TiO3 (SLT) cermet was prepared for SSZ electrolyte -supported SOFC single cells. 15 mgcm(-2) CeasGd(0.1)O(2) (GDC) was impregnated to totally cover the SSZ-SLT anode backbone surface acting as a catalyst, and the cell voltage achieved 0.865 V at 200 mAcm(-2) using (La0.75Sr0.25)(0.98)MnO3 (LSM)-SSZ cathode in 3%-humidified hydrogen fuel at 800 degrees C. Cell performance was substantially improved from 0.865 V to >0.97 V when 0.03 mgcm(-2) Pd or Ni was further incorporated as a secondary catalyst into the anode layer. 50 redox cycles were performed to investigate redox stability of this high performance anode. It was found that even after the 50 redox cycle long-term degradation test, cell voltage at 200 mAcm(-2) was retained around 0.94 V, higher than the cell performance using the conventional Ni-SSZ cermet anode. The catalytically-active reaction sites at ceria-Pd or ceria-Ni may account for the excellent performance, and the extremely low metal catalyst concentration prevent serious metal aggregation in achieving excellent redox stability. (C) 2016 Elsevier B.V. All rights reserved.
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