Lithium battery separator coating material boehmite has excellent insulation, chemical and electrochemical stability, heat resistance, etc. It could improve the thermal stability of the separator and improve the safety of lithium ion batteries at a lower coating thickness to improve the rate performance and cycle performance of the battery.

The boehmite coating can significantly improve the thermal stability of the separator, improve the safety of the lithium battery, improve the rate performance and cycle performance of the battery, and at the same time, the thinner coating thickness helps to increase the volume energy density and weight energy density of lithium ion batteries.