材料科学
蜂窝结构
阴极
固体氧化物燃料电池
质子
蜂巢
氧化物
化学工程
复合材料
化学
电极
物理化学
物理
工程类
冶金
阳极
量子力学
作者
Ruoqi Tang,Xin Men,Liling Zhang,Lei Bi,Zhenning Liu
标识
DOI:10.1016/j.ijhydene.2023.01.071
摘要
A new honeycomb-shaped La0·5Sr0·5Fe0·9P0·1O3-δ (LSFP) material has been proposed as a cathode for proton-conducting solid oxide fuel cells (H–SOFCs). Compared with conventional LSFP, the honeycomb-shaped does not change the crystal structure or the electronic structure of the material but offers a much higher surface area. The unique honeycomb structure allows the easier diffusion of air and H2O evaporations in the cathode, thus benefiting the application of LSFP as a cathode for LSFP. The honeycomb LSFP cathode's fuel cell shows a peak power density of 1474 mW cm−2 at 700 °C, which is higher than the conventional LSFP cell. In addition, the fuel cell performance is also the highest ever reported for H–SOFCs based on the Sr-doped LaFeO3 (LSF) cathodes, making a new life for the first-generation LSF cathode for H–SOFCs. The distribution of relaxation times (DRT) analysis for the cell reveals that the honeycomb-shaped cathode improves the oxygen reduction reaction (ORR) at the cathode, thus improving the cathode kinetics.
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