材料科学
质子
动力学
氧气
氧还原反应
氧还原
物理化学
分析化学(期刊)
核物理学
物理
环境化学
化学
电极
电化学
量子力学
作者
Penghui Yao,Jian Zhang,Qianyuan Qiu,Yicheng Zhao,Fangyong Yu,Yongdan Li
标识
DOI:10.1002/aenm.202403335
摘要
Abstract Sluggish reaction kinetics in oxygen reduction reaction (ORR) is one of the most important challenges to the development of protonic ceramic fuel cells (PCFCs). La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ (LSCF) exhibits high mixed ionic–electronic conductivity in traditional solid oxide fuel cells, but their slow proton transfer and ORR kinetics impedes practical applications. Herein, composite Pr 2 Ni 0.5 Co 0.5 O 4−δ (PNC) particles composed of a perovskite PrNi 0.5 Co 0.5 O 3−δ phase and a PrO 2 phase are impregnated into a LSCF cathode to enhance the ORR activity and proton transfer. The polarization tested in a symmetric cell with PNC‐impregnated LSCF cathode is 0.06 Ω cm 2 at 700 °C. The fuel cell with this impregnated cathode shows maximum power densities of 1857 mW cm −2 at 700 °C. Moreover, the impregnated cathode exhibits a low degradation rate in the durability test. This work not only provides a novel and practical approach to improving the performance of current cathode materials for PCFCs but also highlights the potential for enhancing the commercial viability of PCFC technology.
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