A study on the La1 − xSrxMnO3 oxygen cathode
A study on the La1 − xSrxMnO3 oxygen cathode
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DOI：
10.1016/0013-4686(95)00393-2
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发表时间：
1996-06
影响因子：
6.6
通讯作者：
J. Van Herle;A.J. McEvoy;K. Thampi
中科院分区：
文献类型：
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作者：
J. Van Herle;A.J. McEvoy;K. Thampi
研究了固体氧化物燃料电池中氧还原阴极La 1 − xSrxMnO 3（x = 0.16 − 0.20）在不同温度（700-900 °C）和氧分压（1 − 10−4atm）条件下两种明显不同的电极形态（多孔和致密结构）的阻抗响应和电流-过电位特性。在本研究中，在与氧化钇稳定的氧化锆固体电解质的界面处致密化的电极更有效。在细孔LSM处的反应经由三相边界进行，并且无效地使用材料的混合导电性。这两种情况下（多孔和致密结构）的反应机制进行了讨论，并与文献进行了比较。提出了一种新的双层阴极结构。
The impedance responses and current-overpotential characteristics were studied for oxygen reducing cathodes, stoichiometric La1 − xSrxMnO3(x = 0.16 − 0.20) in solid oxide fuel cells, under varying conditions of temperature (700–900 °C) and oxygen partial pressure (1 − 10−4atm) for two distinctly different electrode morphologies (porous and dense structure). An electrode densified at the interface with the yttria-stabilized zirconia solid electrolyte was more efficient in this study. The reaction at the finely porous LSM proceeds via the triple phase boundary and ineffectively uses the mixed conductivity property of the material. Reaction mechanisms for both cases (porous and dense structure) are discussed and compared with the literature. A new, two-layered cathode structure is proposed.