Freudenberg Performance Materials presented innovative high-performance separators with ceramic impregnation for lithium-ion batteries at the China International Battery Fair last month in Shenzhen.

Ceramic-impregnated high-performance separators for lithium-ion batteries made by Freudenberg can provide important support in the expansion of e-mobility devices in China. Due to their excellent safety performance and high reliability, they can also be adapted for use in stationary energy storage systems, such as solar energy.

“Compared to conventional products, the Freudenberg safety separator offers decisive advantages. It significantly increases safety, is much more temperature-resistant and gives lithium-ion batteries a longer service life,” explains Dr. Frank Heislitz, chief technology officer, Freudenberg Performance Materials.

The safety separator consists of an ultra-thin PET nonwoven, impregnated with ceramic particles. It remains stable at temperatures of up to several hundred degrees Celsius and does not shrink. In comparison to conventional products, it is considerably less sensitive to mechanical stress, particularly at high temperatures. Another plus is that using the safety separator helps to reduce the production cost of lithium-ion batteries. Because higher temperatures can be used, preparation of the battery cells is accelerated by a faster drying process and increased speed of electrolyte impregnation.