期刊
CHEMISTRY OF MATERIALS
卷 24, 期 14, 页码 2655-2663出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm300255r
关键词
SrCoO3; SOFC; SOE; oxygen electrode
资金
- Spanish Ministerio de Ciencia e Innovacion (MICINN) [MAT2010-16404, ENE2009-14750-C05-03]
- MICINN
- Spanish Ministerio de Educacion
The effect of Mo doping on the crystal structure and thermal, electrical, and electrochemical properties of the SrCo1-xMoxO3-delta (x = 0.05, 0.1) system has been studied. The introduction of Mo as a substitution for Co in SrCoO3-delta leads to a change from a hexagonal to a tetragonal perovskite structure at room temperature. The electrical conductivity is largely enhanced by the introduction of Mo at intermediate temperature due to the stabilization of the 3D-perovskite decreases the total conductivity probably due to partial disruption of the electronic pathway. The use of these materials as cathodes in a solid-oxide fuel cell (SOFC) and as anodes in a solid oxide electrolyzer (SOE) has been evaluated, showing low values of electrode polarization resistances in both configurations over the intermediate temperature range. Interestingly, better performance was obtained under anodic polarization conditions reaching overpotential values as low as 28 mV for a current density of 210 mA.cm(-2) at 700 degrees C. The good performance of the SrCo1-xMoxO3-delta compounds in both cathodic and anodic: conditions makes this system a promising candidate for reversible oxygen electrodes in cells that could operate as both SOFC and SOE.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据