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US 11,695,185 B2Granted
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
AssigneeCALB Technology Co., Ltd.
InventorsZhenyu Wang, Haiwen Wang
Life of this patent
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Abstract
A separator including a porous substrate layer, an intermediate layer, and a ceramic coating layer is provided. The ceramic coating layer is disposed on a side of the intermediate layer away from the porous substrate layer. The intermediate layer includes a metal oxide powder. The particle diameter of the metal oxide powder is less than the pore diameter of the porous substrate layer, and at least a portion of the metal oxide powder is embedded in the porous substrate layer. A method of preparing the separator and a lithium-ion battery including the separator are also provided.
Claims17
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.
2 more elements
Dependencies are inferred from the claim text.