Three dimensional microstructures of carbon deposition on Ni-YSZ anodes under polarization

作     者：Dongxu Cui Anna Sciazko Yosuke Komatsu Akiko Nakamura Toru Hara Shiliang Wu Rui Xiao Naoki Shikazono Dongxu Cui;Anna Sciazko;Yosuke Komatsu;Akiko Nakamura;Toru Hara;Shiliang Wu;Rui Xiao;Naoki Shikazono

作者机构：Institute of Industrial ScienceThe University of TokyoTokyo 153-8505Japan Key Laboratory of Energy Thermal Conversion and Control of Ministry of EducationSchool of Energy and EnvironmentSoutheast UniversityNanjing 210018JiangsuChina National Institute for Materials ScienceTsukuba 305-0047Japan 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第87卷第12期

页      面：359-367,I0010页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：partly supported by the New Energy and Industrial Technology Development Organization(NEDO) by the Japan Society for the Promotion of Science KAKENHI(21K14090) the National Key R&D Program of China(2019YFE0122000) the Scientific Research Foundation of Graduate School of Southeast University(YBPY2106) the China Scholarship Council by the Advanced Research Infrastructure for Materials and Nanotechnology in Japan(ARIM Japan)sponsored by the Ministry of Education,Culture,Sport,Science and Technology(MEXT),Japan 

主　　题：Solid oxide fuel cell Anode Carbon deposition Triple-phase boundary 3D reconstruction 

摘      要：In the present study,two Ni/YSZ anodes with different volume ratios of Ni and YSZ,30:70 and 45:55 vol%,are operated in dry methane under open circuit and polarized ***-dimensional(3D)Ni/YSZ microstructures after carbon deposition are reconstructed by the focused ion beam-scanning electron microscopy(FIB-SEM)with the help of machine learning *** the reconstructed mircostructures,volume fraction,connectivity,three phase boundary(TPB)density,and tortuosity are *** addition,local carbon microstructures are quantitatively reconstructed,and the effect of polarization on carbon morphology is *** is demonstrated that Ni surface in the vicinity of active TPB near the electrolyte is free from carbon formation,while remaining Ni surface at some distances from TPB exhibits severe carbon *** average,total amount of carbon deposition is larger near the *** observations imply complex interplay between the electrochemical steam generation and methane cracking on Ni surface which take place very locally near the active TPB.