期刊
JOULE
卷 6, 期 4, 页码 906-922出版社
CELL PRESS
DOI: 10.1016/j.joule.2022.02.015
关键词
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资金
- National Natural Science Foundation of China [52037006]
- Natural Science Foundation of Shandong Province [ZR2021QC117]
- Priority Research Program of Chinese Academy of Sciences [XDA22010602]
- CAS Key Technology Talent Program
- Key Scientific and Technological Innovation Project of Shandong [2020CXGC010401]
By investigating the thermal runaway behavior of Li-S pouch cells, this study reveals that the thermal runaway route starts from cathode-induced reactions and then gets accelerated by reactions from the anode. Moreover, solvent vaporization is found to dominate pressure building up during thermal runaway. The in-depth description of the thermal runaway routes will inspire the mitigation of safety issues in next-generation batteries.
Lithium-sulfur (Li-S) batteries emerge as one of the most attractive energy storage systems due to their ultra-high theoretical energy densities, but the pace of their thermal safety assessment is obviously lagging behind. Herein, by investigating the thermal runaway behavior of Li-S pouch cells from the materials level, we unprecedentedly revealed that the thermal runaway route starts from cathode-induced reactions and then gets accelerated by reactions from the anode. Besides, the solvent vaporization is verified to dominate pressure building up during thermal runaway. Moreover, Li-S batteries employing varied electrolytes with different thermal stabilities, even inorganic all solid-state electrolytes, all undergo rapid thermal runaway at a narrow temperature range due to the intrinsic thermal features of the sulfur cathode and Li metal anode sublimating, melting, and cross-reacting at high temperatures. The in-depth depicted thermal runaway routes will deliver great inspiration for mitigating the safety issues of next generation batteries.
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