SiO2 is a common thermally stable inorganic powder filler, which is widely used, such as filling and modifying polymers. Because of its large specific surface area and the ease of generating a large number of silanol groups (Si-OH), it can improve the hydrophilicity of the diaphragm while improving the electrolyte wettability of the diaphragm, thereby improving the lithium ion transmission performance and the electrochemical performance of the battery. It can also enhance the mechanical strength of the diaphragm.

The above information is for reference only. For further details, they're subject to actual applications and tests.