Journal
CHEMICAL ENGINEERING JOURNAL
Volume 438, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.135550
Keywords
Polyethylene (PE) wax; Separator; High safety; Thermal shutdown; Lithium-ion battery
Categories
Funding
- Natural Science Foundation of Fujian Province of China [2020J06004]
- Amperex Technology Limited
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This study proposes a HDPE wax@boehmite/PE composite separator to improve the safety and cycling performance of LIBs by blocking lithium-ion transportation.
The market of lithium-ion batteries (LIBs) is growing explosively especially due to the wide application of electric vehicles. However, there are still safety concerns existing with EVs under thermal/electrochemical abuse con-ditions. Improving the safety of the battery without sacrificing battery performance is still a major industrial/scientific challenge. Herein, a shutdown functional high-density polyethylene (HDPE) wax@boehmite (gamma-AlOOH, AO)/PE composite separator is proposed. The HDPE@AO coating layer could be preferentially melted and infuse to block the pores of PE matrix, which shuts down the lithium-ion transportation at about 130 degrees C significantly improving the safety of the LIBs. Furthermore, it could also restrain self-discharge behavior and promote the long-term cycling performance. The HDPE wax@AO/PE separator, which could be easily mass produced, holds great promise for large scale application in electric vehicles and other fields.
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