Mo-doped Pr0.6Sr0.4Fe0.8Ni0.2O3-δ as potential electrodes for intermediate-temperature symmetrical solid oxide fuel cells
Mo-doped Pr0.6Sr0.4Fe0.8Ni0.2O3-δ as potential electrodes for intermediate-temperature symmetrical solid oxide fuel cells
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掺钼 Pr0.6Sr0.4Fe0.8Ni0.2O3-δ 作为中温对称固体氧化物燃料电池的潜在电极
DOI：
10.1016/j.electacta.2016.12.170
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发表时间：
2017-02-10
影响因子：
6.6
通讯作者：
Lin, Bin
中科院分区：
文献类型：
--
作者：
Lu, Xiaoyong;Yang, Yang;Lin, Bin
采用改进的Pechini法合成了Mo掺杂的Pr0.6Sr0.4Fe0.8Ni0.2O3-delta（PSFNM）钙钛矿材料，并将其作为中温对称固体氧化物燃料电池（SSOFC）的阳极和阴极进行了评价。研究了Mo掺杂对Pr0.6Sr0.4Fe0.8Ni0.2O3-delta（PSFN）电极结构、电导率、热膨胀系数和电化学性能的影响。结果表明，PSFNM具有立方钙钛矿结构，具有良好的可逆性。经800 ℃、10 h湿H_2气氛加热后，粉末X射线衍射分析表明，PSFNM中出现了SrPrFeO_4、Pr_2O_3和Fe-Ni合金等新相。Mo掺杂样品的电导率虽然略有下降，但热膨胀相容性和氢氧化反应（HOR）活性逐渐提高。在800 ℃时，SSOFC的最大功率密度从435 mW/cm（2）增加到500 mW/cm（2），相应的极化电阻从0.102 Omega.cm（2）降低到0.070 Ω·cm（2）。此外，具有PSFNM电极的SSOFC在700 ℃下运行100 h后显示出稳健的稳定性。这些结果表明，PSFNM是一个有前途的电极SSOFC在中温。(C)2016爱思唯尔有限公司版权所有。
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.