Lattice Boltzmann simulation study of anode degradation in solid oxide fuel cells during the initial aging process  

作　　者：Shixue Liu Zhijing Liu Shuxing Zhang Hao Wu 

机构地区：[1]Hydrogen Energy Industrial Technology Innovation Center,China Nuclear Power Technology Research Institute,Shenzhen 518031,China [2]Shenzhen Engineering Research Center for Hydrogen Safety,Shenzhen 518031,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第2期405-411,共7页矿物冶金与材料学报（英文版）

基　　金：the National Key R&D Program of China(No.2018YFB1502201);the Guangdong Basic and Applied Basic Research Foundation,China(No.2020A1515010551).

摘　　要：For present solid oxide fuel cells(SOFCs),rapid performance degradation is observed in the initial aging process,and the dis-cussion of the degradation mechanism necessitates quantitative analysis.Herein,focused ion beam-scanning electron microscopy was em-ployed to characterize and reconstruct the ceramic microstructures of SOFC anodes.The lattice Boltzmann method(LBM)simulation of multiphysical and electrochemical processes in the reconstructed models was performed.Two samples collected from industrial-size cells were characterized,including a reduced reference cell and a cell with an initial aging process.Statistical parameters of the reconstructed microstructures revealed a significant decrease in the active triple-phase boundary and Ni connectivity in the aged cell compared with the reference cell.The LBM simulation revealed that activity degradation is dominant compared with microstructural degradation during the initial aging process,and the electrochemical reactions spread to the support layer in the aged cell.The microstructural and activity de-gradations are attributed to Ni migration and coarsening.

关 键 词：solid oxide fuel cell anode degradation focused ion beam-scanning electron microscopy lattice Boltzmann method 

分 类 号：TM911.4[电气工程—电力电子与电力传动]