Engineering polyvinylidene fluoride–based lithium-ion battery separators via blending modification

Lithium-ion batteries (LIBs) have become a prevalent trend and a viable energy storage solution due to their exceptional energy density, long lifespan, wide operating temperature range, and elevated voltage. Notably, among LIB separator materials, polyvinylidene fluoride (PVDF) has attracted attention for its exceptional mechanical, thermal, and chemical properties, as well as its ease of fabrication. This article delineates the technical background, manufacturing process, and research advances of PVDF-based LIB membranes through physical blending modification, encompassing inorganic blending, organic blending, and inorganic/organic blends. Moreover, we suggest future research avenues for high-performance PVDF membranes to enhance LIB manufacturing and renewable resource utilization. Overall, this work provides significant technical references for the fabrication of PVDF-based LIB separators, aiding in the advancement of sustainable energy alternatives within the circular economy.