期刊
CERAMICS INTERNATIONAL
卷 46, 期 3, 页码 4000-4005出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.10.017
关键词
LaFeO3; Cathode; Protonic SOFC; Oxides
资金
- Natural Science Foundation of Shandong Province [ZR2018JL017]
- Joint Open Fund of Jiangsu Collaborative Innovation Center for Ecological Building Material and Environmental Protection Equipments and Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province
A Pr-doping strategy was used to improve traditional strontium-doped lanthanum ferrite oxides for proton-conducting solid oxide fuel cells (SOFCs). Three different samples, La0.5Sr0.5FeO3-delta, La0.25Pr0.25Sr0.5FeO3-delta, and Pr0.5Sr0.5FeO3-delta,were successfully prepared. The Pr content was shown to have an obvious influence on the hydration ability of the materials. Hydration was improved at higher Pr-contents, suggesting a promising cathode performance. However, the improved hydration ability did not always lead to an increased fuel cell performance, and it was found that the fuel cell performed best when an appropriate Pr-doping amount was used that resulted in a good compromise between protonic and oxygen-ion conduction. As a result, the optimized composition La0.25Pr0.25Sr0.5FeO3-delta generated a high peak power density of 616 mW cm(-2 )and a low polarization resistance of 0.09 at Omega cm(2) at 700 degrees C, which is an encouraging performance for a traditional cathode material.
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