期刊
ELECTROCHIMICA ACTA
卷 227, 期 -, 页码 33-40出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.12.170
关键词
Symmetrical solid oxide fuel cell; Pro(0.6)Sr(0.4)Fe(0.7)Ni(0.2)MO(0.1)O(3-delta); Interfacial polarization resistance; Robust stability
资金
- Chinese Natural Science Foundation [51102107, 21404015, 51462012, 51202080]
- Anhui Provincial Natural Science Foundation [1408085MKL43]
Mo-doped Pr0.6Sr0.4Fe0.8Ni0.2O3-delta(PSFNM) perovskites are synthesized by a modified Pechini method and evaluated as both anode and cathode for intermediate -temperature symmetrical solid oxide fuel cell (SSOFC). The influence of Mo-doping on structure, conductivity, thermal expansion coefficient and electrochemical performance of Pr0.6Sr0.4Fe0.8Ni0.2O3-delta (PSFN) electrode are investigated. The results indicate that PSFNM exhibits a cubic perovskite structure and shows a good reversibility. After heated at 800 degrees C for 10 h in humidified H-2, some new phases of SrPrFeO4, Pr2O3, and Fe-Ni alloy in PSFNM are identified by powder X-ray diffraction analysis. Although the conductivity of Mo-doped sample is slightly decreased, the thermal expansion compatibility and hydrogen oxidation reaction (HOR) activity are gradually improved. The maximum power density of SSOFC increase from 435 mW/cm(2) to 500 mW/cm(2) at 800 degrees C, and the corresponding polarization resistance decrease from 0.102 Omega.cm(2) to 0.070 Omega.cm(2), respectively. In addition, the SSOFC with PSFNM electrode shows a robust stability after operating at 700 degrees C for 100 h. These results demonstrate that PSFNM is a promising electrode for SSOFC at intermediate temperatures. (C) 2016 Elsevier Ltd. All rights reserved.
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