期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 12, 页码 7975-7989出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.12.153
关键词
Solid oxide fuel cell; Interfacial crack; Crack propagation; Energy release rate; Material parameter
资金
- National Natural Science Founda-tion of China [12102399]
- Fundamental Research Program of Shanxi Province [20210302124383]
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi [2020L0323]
This study investigates the influence of electrode material properties on the interfacial crack propagation in solid oxide fuel cells. Through experimental data, material models and optimization schemes are established to reduce the possibility of delamination, providing guidance for improving the stability and integrity of solid oxide fuel cells.
Interfacial delamination is one of the typical failure modes of solid oxide fuel cell, which is caused by interfacial crack propagation. In order to improve the stability, durability and mechanical integrity of the cell, the influence of electrode material properties on the interfacial crack propagation is studied. Based on a large number of experimental data, the material model of anode and cathode adopts approximate linear model and the different material optimization schemes are set by changing the material parameters, i.e., the ratio of elastic modulus and thermal expansion coefficient between electrode and electrolyte. The crack energy release rate and crack propagation length are taken as important objective functions to compare the extent of interfacial crack propagation under different material optimization schemes. The internal relationship between electrode material parameters and interfacial crack propagation behavior is analyzed, and the optimization scheme of electrode material is obtained to reduce the possibility of delamination in the cell. This research provides guidance for the improvement of stability and integrity of solid oxide fuel cell. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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