Investigation of Structural and Electrochemical Properties ofLaSrCo1-xSbxO4 (0≤x≤0.20) as Potential Cathode Materials inintermediate-temperature Solid Oxide Fuel Cells
Investigation of Structural and Electrochemical Properties ofLaSrCo1-xSbxO4 (0≤x≤0.20) as Potential Cathode Materials inintermediate-temperature Solid Oxide Fuel Cells
复制标题
LaSrCo1-xSbxO4 (0≤x≤0.20)作为中温固体氧化物燃料电池潜在正极材料的结构和电化学性能研究
DOI：
10.1016/j.jssc.2016.11.038
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发表时间：
2016
影响因子：
3.3
通讯作者：
周峻
中科院分区：
文献类型：
--
作者：
周峻
The structural and electrochemical properties of the layered perovskite oxides LaSrCo1−xSbxO4(0≤x≤0.20) were investigated to study the effects of substituting Sb for Co for application as cathode materials in intermediate temperature solid oxide fuel cells (IT-SOFCs). The results of crystal structure analyses show the maximum content of Sb in LaSrCo1−xSbxO4to be 0.05 as a pure single phase. XPS shows that Co and Sb in LaSrCo0.95Sb0.05O4may possess mixed-oxidation states. The electrical conductivity increased greatly after Sb substitution. An improvement in the cathode polarization (Rp) values is observed from the Sb-doped sample with respect to the undoped samples. For example,Rpof LaSrCo0.95Sb0.05O4on LSGM was observed to be 0.16 Ω cm2at 800 °C in air. The main rate-limiting step for LaSrCo0.95Sb0.05O4cathode is charge transfer of oxygen atoms. These results indicate that Sb can be incorporated into LaSrCo1−xSbxO4based materials and can have a beneficial effect on the performance, making them potentially suitable for use as cathode materials in IT-SOFCs.
