Plasma spray coating on interconnector toward promoted solid oxide fuel cells and solid oxide electrolysis cells  

作　　者：Junwen CAO Yun ZHENG Wenqiang ZHANG Bo YU 

机构地区：[1]Institute of Nuclear and New Energy Technology(INET),Collaborative Innovation Center of Advanced Nuclear Energy Technology,Tsinghua University,Beijing 100084,China [2]Department of Chemical Engineering,University of Waterloo,Waterloo,Ontario N2L 3G1,Canada [3]Institute of New Energy Materials and Engineering,School of Materials Science and Engineering,Fuzhou University,Fuzhou 350108,China

出　　处：《Frontiers in Energy》2024年第3期390-398,共9页能源前沿（英文版）

摘　　要：Interconnector is a critical component to construct solid oxide cells (SOCs) stack. Oxidation of metallic interconnectors and Cr poisoning caused by oxidation are important factors that lead to long-term performance degradation of SOCs. Coating on the interconnector surface is an important approach to inhibit the oxidation and Cr migration of the interconnector. Herein, (La0.75Sr0.25)0.95MnO3–δ (LSM) and Mn1.5Co1.5O4 (MCO) are used to fabricate the coatings of interconnector. Two advanced thermal spray technology, atmospheric plasma spraying (APS) and low-pressure plasma spray (LPPS), are adopted for the coating preparation. The electrochemical performance, rising and cooling cycle stability, and Cr diffusion inhibition performance of the coatings are tested and evaluated. The result indicates that MCO can generate more uniform and denser coatings than LSM. In addition, MCO coatings prepared by LPPS shows the best electrochemical performance, rising and cooling cycle stability, and Cr diffusion inhibition. The initial area specific resistance (ASR) is 0.0027 Ω·cm2 at 800 °C. After 4 cooling cycle tests, the ASR increases to 0.0032 Ω·cm2 but lower than other samples. Meanwhile, the relative intense of Cr at the interface of SUS430 with MCO coatings fabricated by LPPS is lower than that of MCO fabricated by APS after 4 rising and cooling cycle operations, showing more favorable Cr diffusion inhibition performance.

关 键 词：interconnector coating plasma spray electrochemical performance Cr diffusion inhibition solid oxide cells(SOCs) 

分 类 号：TM911.4[电气工程—电力电子与电力传动]