Abstract
Polyimide (PI) is a kind of favorite polymer for the production of the membrane due to its excellent physical and chemical properties, including thermal stability, chemical resistance, insulation, and self-extinguishing performance. We review the research progress of PI separators in the field of energy storage—the lithium-ion batteries (LIBs), focusing on PI separators containing different groups and compounding with different substances. This review will help to optimize the PI separator material for the LIBs and favor understanding the preparation-groups, structure-performance relationship of porous separators in LIBs. Therefore, the advantages of PI separators in lithium-ion batteries are introduced in detail and the development of PI separators to the lithium-ion batteries is prospected.
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