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首页> 外文期刊>Electrocatalysis >Investigation of Electrochemical Properties of Model Lanthanum Strontium Cobalt Ferrite-Based Cathodes for Proton Ceramic Fuel Cells
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Investigation of Electrochemical Properties of Model Lanthanum Strontium Cobalt Ferrite-Based Cathodes for Proton Ceramic Fuel Cells

机译：质子陶瓷燃料电池用镧锶钴铁氧体型阴极的电化学性能研究

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摘要

The electrochemical properties of La0.6Sr0.4Co0.2Fe0.8O3-delta-based cathodes are studied as model electrodes for proton ceramic fuel cells. The electrochemical performance of symmetric cells with porous cathodes (La0.6Sr0.4Co0.2Fe0.8O3-delta, La0.6Sr0.4Co0.2Fe0.8O3-delta-BaCe0.9Y0.1O3-delta, and La0.6Sr0.4Co0.2Fe0.8O3-delta-BaZr0.8Y0.2O3-delta), investigated as a function of oxygen and water partial pressures, follows the order La0.6Sr0.4Co0.2Fe0.8O3-delta-BaCe0.9Y0.1O3-delta >= La0.6Sr0.4Co0.2Fe0.8O3-delta La0.6Sr0.4Co0.2Fe0.8O3-delta-BaZr0.8Y0.2O3-delta. The results indicate that the cathode performance of La0.6Sr0.4Co0.2Fe0.8O3-delta-BaCe0.9Y0.1O3-delta is enhanced mainly due to the extension of the effective triple phase boundary, whereas that of La0.6Sr0.4Co0.2Fe0.8O3-delta-BaZr0.8Y0.2O3-delta is lowered due to the poor proton conductivity along the percolated BaZr0.8Y0.2O3-delta particles. From the observed oxygen partial pressure dependence, the rate-determining step of the above cathode polarization reaction is principally ascribed to the oxygen reduction reaction.
机译：研究了La0.6Sr0.4Co0.2Fe0.8O3-δ基阴极的电化学性能，作为质子陶瓷燃料电池的模型电极。具有多孔阴极（La0.6Sr0.4Co0.2Fe0.8O3-delta，La0.6Sr0.4Co0.2Fe0.8O3-delta-BaCe0.9Y0.1O3-delta和La0.6Sr0.4Co0.2Fe0的对称电池的电化学性能作为氧气和水分压的函数进行研究的.8O3-δ-BaZr0.8Y0.2O3-δ遵循La0.6Sr0.4Co0.2Fe0.8O3-δ-BaCe0.9Y0.1O3-δ> = La0的顺序.6Sr0.4Co0.2Fe0.8O3-δLa0.6Sr0.4Co0.2Fe0.8O3-δ-BaZr0.8Y0.2O3-δ。结果表明，La0.6Sr0.4Co0.2Fe0.8O3-δ-BaCe0.9Y0.1O3-δ的阴极性能得到了增强，这主要是由于有效三相边界的延长，而La0.6Sr0.4Co0的阴极性能得到了提高。 2Fe0.8O3-δ-BaZr0.8Y0.2O3-δ的降低是由于沿着渗透的BaZr0.8Y0.2O3-δ粒子的质子传导性差。从观察到的氧分压依赖性，上述阴极极化反应的速率确定步骤主要归因于氧还原反应。

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