Open AccessThe study of the reconstructed three‐dimensional structure of a solid‐oxide fuel‐cell cathode by X‐ray nanotomography
Author(s) -
Guan Yong,
Li Wenjie,
Gong Yunhui,
Liu Gang,
Gelb Jeff,
Zhang Xiaobo,
Xiong Ying,
Tian Yangchao,
Wang Haiqian
Publication year - 2010
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049510038112
Subject(s) - microstructure , cathode , materials science , tortuosity , porosity , solid oxide fuel cell , oxide , yttria stabilized zirconia , electrode , electrochemistry , anode , cubic zirconia , phase (matter) , chemical engineering , composite material , metallurgy , chemistry , ceramic , organic chemistry , engineering
The microstructure and morphology of solid‐oxide fuel‐cell electrodes are very complex but important because they strongly affect the electrical performance of the cell. In this work the high‐resolution X‐ray nanotomography technique is applied to reconstruct the three‐dimensional microstructure of a (La 0.8 Sr 0.2 ) 0.95 MnO 3 yttria‐stabilized zirconia composite cathode. Some key microstructural parameters, such as the porosity, representative elementary volume, connected pore volume and pore phase tortuosity, were obtained based on the three‐dimensional reconstruction volume data with a spatial resolution of sub‐60 nm. These parameters bear intimate correlation with the efficiency of the electrochemical conversion process, and provide valuable information for optimizing the manufacturing processes and improving the device's reliability.