Title:
SAFE LITHIUM-ION BATTERY SEPARATOR, PREPARATION METHOD AND LITHIUM-ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/121265
Kind Code:
A1
Abstract:
A safe lithium-ion battery separator, a preparation method and a lithium-ion battery, which relate to the technical field of lithium-ion batteries. The preparation method comprises the following steps: S1, the preparation of an aqueous slurry: mixing a ceramic material, magnesium oxide, conductive carbon black and aqueous glue, and then stirring evenly to obtain the aqueous slurry; S2, the preparation of a first thin film (10): placing trans-1,4-polyisoprene, butadiene rubber, conductive carbon black and water-soluble salt into a kneading granulator for kneading to make a memory material, mixing high molecular polymer particles and a solid material and then placing same into a film blowing machine, blowing the mixed material of the high molecular polymer particles and the solid material into a film by means of a thin film blowing method, and passing the obtained thin film through water and drying to obtain the first film (10); S3, the preparation of a second thin film (20); and S4, the preparation of a lithium-ion battery separator. The separator is able to block the reaction of an electrolyte when the temperature increases so as to protect the battery.
Inventors:
ZANG SHIWEI (CN)
LIU WENQING (CN)
LIU WENQING (CN)
Application Number:
PCT/CN2021/099441
Publication Date:
June 16, 2022
Filing Date:
June 10, 2021
Export Citation:
Assignee:
CHONGQING JIMAT NEW MATERIAL TECH CO LTD (CN)
International Classes:
H01M50/403; H01M10/0525; H01M50/443; H01M50/451; H01M50/491
Foreign References:
| CN112582749A | 2021-03-30 | |||
| CN106953050A | 2017-07-14 | |||
| CN205194767U | 2016-04-27 | |||
| CN111785893A | 2020-10-16 | |||
| US8470898B2 | 2013-06-25 | |||
| CN111769239A | 2020-10-13 |
Other References:
See also references of EP 4040588A4
Attorney, Agent or Firm:
BEIJING EASY JOY SOON IP AGENT LTD (CN)
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