Preparation of PI Microporous Membrane for Lithium Ion Batteries

Nano SiO 2 were doped in PI film and then treated with HF solution to get PI microporous membranes. The PI separator was characterized by SEM, thermal shrinkage, AC impendance and charge-discharge experiments. The results show that the thermal performance of PI separator is superior to PP separator and the safety of Lithium-ion battery can be greatly improved.