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Title:
BATTERY SEPARATOR AND PREPARATION METHOD THEREFOR, AND BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/232154
Kind Code:
A1
Abstract:
A battery separator and a preparation method therefor, and a battery. The battery separator comprises a base film; one side or two sides of the base film are coated with a high polymer layer; the high polymer layer is mainly formed by mixing a first polymer, a second polymer, first ceramic particles and second ceramic particles; the particle size of the first ceramic particles is 0.01-0.3 μm; the first ceramic particles have higher surface activity; the specific surface area of the first ceramic particles is larger than or equal to 50 m2/g; the first ceramic particles can achieve a function of making the first polymer and the second polymer compatible with each other in a slurry system, so as to enhance the adhesion of a high polymer slurry to a base material; the second ceramic particles are used as a filler for increasing the surface roughness of a high polymer layer; the surfaces of the second ceramic particles are wrapped by the polymers, so as to increase the bonding force of the polymers to electrode sheets.

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Inventors:
YANG DANDAN (CN)
PING XIANG (CN)
HUANG HUIZHEN (CN)
LIN YULIN (CN)
Application Number:
PCT/CN2023/103379
Publication Date:
December 07, 2023
Filing Date:
June 28, 2023
Export Citation:
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Assignee:
JIANGSU SENIOR NEW MATERIAL TECH CO LTD (CN)
SHENZHEN SENIOR TECHNOLOGY MATERIAL CO LTD (CN)
International Classes:
H01M50/446; H01M50/409; H01M50/411; H01M50/434
Foreign References:
CN112151728A2020-12-29
CN111192999A2020-05-22
CN113611982A2021-11-05
CN106252570A2016-12-21
CN110600663A2019-12-20
CN112909430A2021-06-04
CN113437435A2021-09-24
CN215119155U2021-12-10
JP2021144950A2021-09-24
US20210102063A12021-04-08
Attorney, Agent or Firm:
SHANGHAI HUIHAN INTELLECTUAL PROPERTY LAW FIRM (CN)
Download PDF:
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