LU Kaizhen ^{1, 3}, WANG Leying ^{1, 3}, LUO Linghong ^{1, 3}, CHENG Liang ^{2, 3}, XU Xu ^{1, 3}, WU Yefan^{1, 3}
(1. School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China; 2. National Engineering Research Center for Domestic & Building Ceramics Jingdezhen Ceramic University, Jingdezhen 333001, Jiangxi, China; 3. Jiangxi Provincial Key Laboratory of Fuel Cell Materials and Devices, Jingdezhen Ceramic University, Jingdezhen 333001, Jiangxi, China)

Abstract: Reversible solid oxide cells (RSOCs) could be alternately operated in SOFC/SOEC mode, which could realize sustainable cycle of clean energy and electric energy, thus realizing “peak shifting and valley filling”. Because of the advantages of high efficiency and long-time/large-scale energy storage etc., RSOCs have broad application prospects in the construction of Energy Internet. Conventional Ni-YSZ fuel electrode materials are prone to sulfur poisoning when using fuel gases containing sulfur impurities and carbon accumulation, such as hydrocarbon fuels. Strontium titanate (SrTiO₃) perovskite has been the most widely studied RSOCs fuel electrode material, due to its highly adjustable structure and properties, high structural stability and thermochemical stability, and strong anti-carbon accumulation and anti-sulfur poisoning ability. Research progress of SrTiO₃-based RSOCs fuel electrodes are reviewed, while the related mechanisms are described. The challenges of SrTiO₃-based fuel electrode in the future application of RSOCs are discussed.
Key words: reversible solid oxide cells; fuel electrode; SrTiO₃; A/B-site doping; in situ exsolution