Y2Mo3O12–Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode catalyst for proton-conducting solid oxide fuel cells
Y2Mo3O12–Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode catalyst for proton-conducting solid oxide fuel cells
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DOI：
10.1016/j.jpowsour.2022.232073
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发表时间：
2022-12
影响因子：
9.2
通讯作者：
Peiyi Lin;Xi Xu;Shoufu Yu;Yanru Yin;M. Andersson;L. Bi
中科院分区：
文献类型：
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作者：
Peiyi Lin;Xi Xu;Shoufu Yu;Yanru Yin;M. Andersson;L. Bi
阴极和电解质之间的热膨胀系数不匹配是高性能质子导电固体氧化物燃料电池（H-SOFCs）的难题之一。在ba0.5 sr0.5 co0.8 fe0.3 2o3 -δ(BSCF)阴极上引入负热膨胀成分Y2Mo3O12（YMO）来克服这一困难。不仅提高了电解阴极的连接性能，而且提高了电池的性能。使用复合阴极的电池在700°C时的最大功率密度达到1010.9 mW cm - 2。模拟研究和实验结果证实，YMO能软化阴极接触层上的应力，使阴极不发生分层。此外，YMO与BSCF反应产生的BSCF上的a位缺陷也对氧还原反应（ORR）活性起着积极的作用。本研究为研究和提高H-SOFCs的热机械稳定性和电池性能提供了新的途径。
The mismatch of the coefficients of thermal expansion between cathode and electrolyte is one of the thorniest problems for high-performance proton-conducting solid oxide fuel cells (H–SOFCs). Here one strategy is applied by introducing the negative thermal expansion component, Y2Mo3O12(YMO), on Ba0.5Sr0.5Co0.8Fe0.2O3-δ(BSCF) cathode to overcome this difficulty. As a result, not only the electrolyte-cathode connection but also the cell performance is improved. The maximum power density of the cell using a composite cathode reaches 1010.9 mW cm−2at 700 °C. The YMO softens the stress on the contact layer that keeps the cathode from delamination, which is confirmed by simulation studies and experiments. Furthermore, the A-site defect on BSCF created by the reaction between YMO and BSCF also plays a positive role in the oxygen reduction reaction (ORR) activity. This study provided a new way to study and improve the thermo-mechanical stability and cell performance of H–SOFCs.