期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 3, 页码 3610-3616出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b19049
关键词
lithium-ion battery; polyimide; separator; phase separation; dibutyl phthalate; glycerin
资金
- National Key R&D Program of China [2018YFB0104300]
- National Natural Science Foundation of China [51772241]
- Independent Research Project of National Key Laboratory of Electrical Insulation and Power Equipment [EIPE19111]
- general project Fundamental Research Funds
- State Key Laboratory of Electrical Insulation and Power Equipment (Xi'an Jiaotong university)
A porous polyimide (PI) membrane is successfully prepared via nonsolvent-induced phase separation with two porogens: dibutyl phthalate and glycerin. The as-prepared uniform porous PI membrane shows excellent separator properties for lithium-ion batteries (LIBs). Compared with the commercial polyethylene (PE) separator, the PI separator exhibits significant thermal stability, better ionic conductivity, and wettability both in carbonate and ether electrolytes for LIBs. The battery coin-cells assembled with the PI separator is more robust and still works even after heating at 140 degrees C for 1 h, while the cells with the commercial PE separator could not charge any more due to the shrinkage of the PE under the same condition.
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