期刊
INTERNATIONAL JOURNAL OF PLASTICITY
卷 88, 期 -, 页码 188-203出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2016.10.009
关键词
Irradiation effect; Elastic-plastic material; Crystal plasticity; Constitutive behavior; Lithium-ion battery
资金
- National Natural Science Foundation of China [11372267, 11402086, 11472141]
- National High Technology Research and Development Program of China (863 Program) [2013AA032502]
Lithium-ion batteries (LIBs) in space or extreme environments may suffer irradiation and during operation, it is difficult to obtain the intrinsic mechanical properties of electrode materials due to coexistence of electrochemical reaction and irradiation. In this paper, effects of irradiation temperature, dose, and diffusion-induced stress on their mechanical behaviors are explored. By introducing diffusion-induced stress, an electrochemical irradiated plasticity model is developed for electrodes in cylindrical LIBs, which is validated by comparing numerical results with experimental data. It is shown that the yield strength of unirradiated active materials decreases with increasing the state of charge, which is attributed to the softening behavior from electrochemical reactions in a diffusion process of Li-ions. For irradiated active materials, the yield strength increases with increasing irradiation dose due to irradiation-induced defects; however, it decreases with irradiation temperature. Such a model can be applied to build up the stress-strain relations of composite electrodes and to provide a guideline for assessing their mechanical behaviors during different states of charge in LIBs. (C) 2016 Elsevier Ltd. All rights reserved.
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