Title:
LITHIUM BATTERY SEPARATOR COMPRISING POROUS PVDF-BASED RESIN COATING AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/123423
Kind Code:
A1
Abstract:
A lithium battery separator comprising a porous PVDF-based resin coating. The porous PVDF-based resin coating is located on at least one surface of a base film; and the thickness of a single porous PVDF-based resin coating is 0.5-3.5 μm, wherein the bonding strength (N/M)/coating air permeability increment (s/100cc) ≥ 0.25, and the bonding strength (N/M)/areal density per unit coating (g/m2/μm) ≥ 10, so that a porous PVDF-based resin coating having excellent thickness, coating air permeability increment, bonding strength, and thermal shrinkage is obtained. The formed lithium battery separator also has excellent cycling performance and heat resistance.
Inventors:
BAI YAOZONG (CN)
MA PINGCHUAN (CN)
LIU GAOJUN (CN)
GAO FEIFEI (CN)
DU JINGRAN (CN)
ZHANG XUJIE (CN)
ZHOU YANG (CN)
ZHAI MENGMENG (CN)
HAN CHAO (CN)
WEI MING (CN)
ZHANG SEN (CN)
SUN YUAN (CN)
MA PINGCHUAN (CN)
LIU GAOJUN (CN)
GAO FEIFEI (CN)
DU JINGRAN (CN)
ZHANG XUJIE (CN)
ZHOU YANG (CN)
ZHAI MENGMENG (CN)
HAN CHAO (CN)
WEI MING (CN)
ZHANG SEN (CN)
SUN YUAN (CN)
Application Number:
PCT/CN2021/143846
Publication Date:
July 06, 2023
Filing Date:
December 31, 2021
Export Citation:
Assignee:
SINOMA LITHIUM BATTERY SEPARATOR CO LTD (CN)
International Classes:
H01M10/052; H01M50/409; H01M50/403; H01M50/431; H01M50/44; H01M50/451
Domestic Patent References:
| WO2017107436A1 | 2017-06-29 |
Foreign References:
| CN111192999A | 2020-05-22 | |||
| CN208706747U | 2019-04-05 | |||
| CN110137414A | 2019-08-16 | |||
| CN111518442A | 2020-08-11 | |||
| US20180212271A1 | 2018-07-26 | |||
| JP2014112553A | 2014-06-19 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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