US 11,695,185 B2
Separator including porous substrate layer, metal oxide intermediate layer, and ceramic coating layer, method of preparing the same and lithium-ion battery including the same
Zhenyu Wang, Changzhou (CN); and Haiwen Wang, Changzhou (CN)
Assigned to CALB Technology Co., Ltd., Jiangsu (CN)
Filed by CALB Technology Co., Ltd., Changzhou (CN)
Filed on Sep. 4, 2020, as Appl. No. 17/12,053.
Claims priority of application No. 202010199106.4 (CN), filed on Mar. 20, 2020.
Prior Publication US 2021/0296626 A1, Sep. 23, 2021
Int. Cl. H01M 50/431 (2021.01); H01M 50/403 (2021.01); H01M 10/0525 (2010.01)
CPC H01M 50/431 (2021.01) [H01M 10/0525 (2013.01); H01M 50/403 (2021.01)] 17 Claims
 
1. A separator, comprising:
a porous substrate layer;
an intermediate layer, wherein the intermediate layer comprises a metal oxide powder, a particle diameter of the metal oxide powder is less than a pore diameter of the porous substrate layer, and at least a portion of the metal oxide powder is embedded in the porous substrate layer; and
a ceramic coating layer, wherein the ceramic coating layer is disposed on a side of the intermediate layer away from the porous substrate layer, wherein the ceramic coating layer comprises ceramic material particles, the ceramic material particles comprise 5 to 10 parts by weight of small particles, 30 to 70 parts by weight of medium particles, and 5 to 10 parts by weight of large particles,
the small particles are ceramic material particles with D50=0.8 μm, the medium particles are ceramic material particles with D50=3.6 μm, and the large particles are ceramic material particles with D50=9.2 μm.