Using high‐HFP‐content cathode binder for mitigation of heat generation of lithium‐ion battery |
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| Authors: | Anh V. Le Meng Wang Daniel J. Noelle Yang Shi Y. Shirley Meng Dengguo Wu Jiang Fan Yu Qiao |
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| Affiliation: | 1. Department of Structural Engineering, University of California, San Diego, La Jolla, CA, USA;2. Program of Materials Science and Engineering, University of California, San Diego, La Jolla, CA, USA;3. Department of Nanoengineering, University of California, San Diego, La Jolla, CA, USA;4. American Lithium Energy Corporation, Vista, CA, USA |
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| Abstract: | We investigate the effects of thermally sensitive binder (TSB) on the temperature increase of lithium‐ion battery (LIB) coin cell subjected to severe mechanical abuse. The TSB is poly(vinylidenefluoride‐co‐hexafluoropropylene) (PVDF‐HFP), similar to conventional poly(vinylidenefluoride) (PVDF) binder but with a significant hexafluoropropylene (HFP) content. The testing data show that by using TSB, the peak temperature increase of nail‐penetrated LIB coin cell can be reduced by 20% to 40%, attributed to the softening of TSB that begins from ~80°C. The cycling performance of the LIB cells is also characterized. This research sheds light on the development of thermal‐runaway mitigation techniques. |
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| Keywords: | binder electrode lithium‐ion battery PVDF‐HFP thermal runaway |
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