Electrochemical properties of novel SOFC dual electrode La0.75Sr0.25Cr0.5Mn0.3Ni0.2O3 - δ
Electrochemical properties of novel SOFC dual electrode La0.75Sr0.25Cr0.5Mn0.3Ni0.2O3 - δ
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DOI：
10.1016/j.ssi.2010.10.015
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发表时间：
2011-03-03
影响因子：
3.2
通讯作者：
Caldes, M. T.
中科院分区：
文献类型：
--
作者：
Delahaye, T.;Jardiel, T.;Caldes, M. T.
评价了钙钛矿La0.75Sr0.25Cr0.5Mn0.3Ni0.2O3 (- delta) （LSCMMn0.30Ni0.20）作为固体氧化物燃料电池的电位电极。在800℃下研究了LSCMMn0.30Ni0.20在氢氧化和氧还原反应中的电化学性能。采用电化学阻抗谱法研究了对称电池LSCMMn0.30Ni0.20/YSZ/LSCMMn0.30Ni0.20。LSCMMn0.30Ni0.20的总电导率在空气中为22 S cm(-1)，在湿的5% H-2/Ar条件下为0.8 S cm(-1)， 800℃时氢氧化反应的面积比电阻（ASR）为1 ω cm(2)。氧还原反应的ASR为1.6 ω cm(2)。24 h的老化研究表明，其电化学性能具有较好的稳定性。LSCMMn0.3Ni0.2似乎是一种很有前途的对称SOFC双电极。(C) 2010 Elsevier B.V.版权所有
The perovskite La0.75Sr0.25Cr0.5Mn0.3Ni0.2O3 (- delta) (LSCMMn0.30Ni0.20) was evaluated as potential electrode for solid oxide fuel cells. The electrochemical performances of LSCMMn0.30Ni0.20 for hydrogen oxidation and oxygen reduction reactions were studied at 800 degrees C. Symmetrical cells LSCMMn0.30Ni0.20/YSZ/LSCMMn0.30Ni0.20 were studied by electrochemical impedance spectroscopy. The total conductivity of LSCMMn0.30Ni0.20 is 22 S cm(-1) in air and 0.8 S cm(-1) under wet 5% H-2/Ar at 800 degrees C. The area specific resistance (ASR) at 800 degrees C for hydrogen oxidation reaction is 1 Omega cm(2). The ASR for oxygen reduction reaction is 1.6 Omega cm(2). An ageing study during 24 h shows a relatively good stability of the electrochemical performances. LSCMMn0.3Ni0.2 seems to be a promising dual electrode for a symmetrical SOFC. (C) 2010 Elsevier B.V. All rights reserved.