A new Fe-doped Ca3Co4O9 cathode for protonic ceramic fuel cells

被引：1
|
作者：
Yue, Yiqiu [1 ]
Yu, Shoufu [1 ]
Gu, Yueyuan [1 ]
Bi, Lei [1 ]
机构：
[1] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2024年 / 50卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Ca3Co4O9; Cathode; Proton conductor; PCFCs; OXIDE; PERFORMANCE;
D O I：
10.1016/j.ceramint.2024.06.237
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Fe-doped cobaltite Ca3Co4O9 (CCO) is modified to enhance the efficiency of CCO cathodes in protonic ceramic fuel cells (PCFCs). The Ca3Co3.8Fe0.2O9 (CCFO) material enhances the creation of oxygen vacancies, hydration, and proton migrations, as demonstrated by first-principles calculations. Subsequent investigations show that doping Fe into CCO improves the charger diffusion abilities and maintains compatible thermal expansion. A PCFC with a CCFO cathode demonstrates superior fuel cell performance, reaching 1790 mW cm(-2) at 700 degrees C. This performance surpasses that of a cell with a CCO cathode and sets a new record for layer cobaltite in PCFCs. The composite cathode design hinders the performance of CCFO and CCO cathodes in PCFCs, indicating proton conduction in these oxides. This aligns with first-principles simulations, making them promising cathode options for PCFCs.
引用
收藏
页码：40436 / 40444
页数：9
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