DING Liping ^{2, 3}, CHENG Liang ^{1, 3}, LUO Linghong ^{2, 3}, WANG Leying ^{2, 3}, XU Xu ^{2, 3}, LIU Shaoshuai 3, YU Jianfeng ^{2, 3}, ZHANG Shuangshuang ^{2, 3}, CAO Xiwen ^{2, 3}
(1. National Engineering Research Center for Domestic & Building Ceramics Jingdezhen Ceramic University, Jingdezhen 333001, Jiangxi, China; 2. School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China; 3. Jiangxi Provincial Key Laboratory of Fuel Cell Materials and Devices, Jingdezhen Ceramic University, Jingdezhen 333001, Jiangxi, China)

Abstract: Solid Oxide Fuel Cells (SOFCs) are a crucial component of the next-generation energy systems, with high energy conversion efficiency, a wide range of fuel options, absence of precious metal catalysts and environmental friendliness, as compared with the conventional power generation technologies. The anode, as a significant electrochemical reaction site within SOFC, greatly influences the cell performance. Over time, anode materials have evolved from initial precious metal-based ceramics to today’s oxide-based materials. Among these, the double perovskite, as a derivative of perovskite, has become the current mainstream choice. Sr₂Fe_{1 +x}Mo_1−xO_6−δ(SFMO), due to its outstanding conductivity, resistance to carbon deposition and sulfur tolerance, has gained widespread attention. However, there are still challenges to be addressed before commercialization. To further enhance the catalytic activity and stability of SFMO anodes, researchers have focused on material modification. This article is aimed to provide an overview on the research progress in improving the performance of SFMO anodes modified with various methods, including doping (A, B doping and A/B co-doping), A-site deficiency and surface modification. By comparing phase, structure and electrochemical performance of the anodes, the effects of the modification methods on electrochemical performance, long-term stability, and the ability to undergo hydrogen cleavage and oxidation reactions will be discussed.
Key words: solid oxide fuel cell; double perovskite; anode; modification; Sr₂Fe_{1 +x}Mo_1−xO_6−δ