WU Shijing 1, CHEN Lin 1, LIU Jiale 1, YANG Ye 2, YU Sha 2, ZHANG Wenying 1,
JIA Lichao 3, YAN Dong 3, LI Jian 3
(1. School of Mechanical and Electronic Information, China University of Geosciences, Wuhan 430074, Hubei, China;2. China Science and Technology Exchange Center, Beijing 100045, China; 3. School of Materials Science
and Engineering, Huazhong University of Science & Technology, Wuhan 430074, Hubei, China)
Abstract: The oxidation resistance and electrical conductivity of the metallic interconnect are crucial factors determining the life of stack solid oxide fuel cell (SOFC). In recent years, the surface modification of the metallic interconnects by using spinel coatings has drawn much attention, aiming to solve the issues of insufficient oxidation resistance, high area-specific resistance(ASR) and Cr volatilization of the Fe-Cr based alloys for the interconnects. The progress in the research on Mn-Co is reviewed, focusing on the use of spinel coating materials for the surface modification of metallic interconnects in terms of alloy substrate pretreatment, coating preparation methods, sintering and working atmosphere and Co/Mn ratio and element doping. Meanwhile, the future development and research for such coatings are proposed.
Key words: solid oxide fuel cells; metallic interconnect; Mn-Co based spinel coating