Porous film and lithium-ion battery
AssigneeNingde Amperex Technology Limited
InventorsJianjian Yi, Xinzhi Zhang, Zengbin Wei, Xinghua Tao
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Abstract
The application provides a porous film and a lithium-ion battery. The porous film according to the present application has excellent adhesion, and the pore structure of the porous film can still be well maintained after being immersed in the electrolyte, thereby reducing the probability of pore blockage of the porous film and allowing the lithium-ion battery to have high ionic conductivity. Therefore, the rate performance of the lithium-ion battery is greatly improved, and the lithium-ion battery provided has excellent rate performance and cycle performance.
Claims7
A porous film, comprising:
- a binder;
- and
- inorganic particles;
- wherein the porous film comprises pores formed by the binder, the pores at least comprises a part of the inorganic particles, and the average wall thickness between the pores is in a range of 20 nm to 500 nm, wherein the inorganic particles have particle sizes that Dv10 is in a range of 0.015 μm to 3 μm, Dv50 is in a range of 0.2 μm to 5 μm, Dv90 is in a range of 1 μm to 10 μm;
- Dv10 is less than Dv50, and Dv50 is less than Dv90;
- and the ratio of Dv90 to Dv10 is in a range of 2 to 100.
Dependencies are inferred from the claim text.