期刊
CELL REPORTS PHYSICAL SCIENCE
卷 4, 期 7, 页码 -出版社
CELL PRESS
DOI: 10.1016/j.xcrp.2023.101465
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In this study, an in situ observation method for thermal runaway (TR) and its propagation (TRP) in lithium-ion battery electrodes was proposed using high-frequency induction heating as the TR triggering mechanism. The non-contact, rapid heating technique enabled direct observation of TRP. It was found that venting occurred in all samples and dendritic burn patterns appeared on separators during TRP. The heat-induced shrinkage of separators was more pronounced on the anode side. Phenomena observed during tests included gas flow paths, drifting sparks, short-circuit propagation, and electrolyte boiling. This method contributes to a better understanding of LIB TRP behavior and facilitates strategies to enhance safety and TR characteristics.
Lithium-ion batteries (LIBs) are instrumental for electric vehicles, but safety is a concern due to thermal runaway (TR) events. In this study, an in situ observation method for TR and its propagation (TRP) in LIB electrodes is presented, employing high-frequency induction heating as the TR triggering method. The non-contact, rapid heating technique facilitates direct trigger of TRP in a self-made tempered glass observer. Experiments reveal that venting occurs in all samples, and dendritic burn patterns appear on separators upon TRP. The heat-induced shrinkage of separators is more pronounced on the anode side. Phenomena observed during tests include gas flow paths, drifting sparks, short-circuit propagation, and electrolyte boiling. This method may contribute to a better understanding of LIB TRP behavior, facilitating strategies to improve safety and TR characteristics.
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