Title:
COPOLYMERIZED PVDF RESIN FOR LITHIUM BATTERY BINDER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/041977
Kind Code:
A1
Abstract:
A copolymerized PVDF resin for a lithium battery binder and a preparation method therefor. The preparation method comprises the following steps: reacting 300-600 parts of deionized water,0.04-0.25 part of a pH buffer regulator, 85-99.5 parts of a vinylidene fluoride (VDF) monomer, 0.5-15 parts of a comonomer, 0.3-3 parts of a metallocene synergist, 0.2-1.0 part of an initiator and 0.08-0.35 part of a dispersant at 40-65℃ under 5.5-8.0 Mpa; recovering unreacted monomers after the reaction is finished; and washing, filtering and drying same, so as to obtain the copolymerized PVDF resin. The copolymerized PVDF resin for a lithium battery binder improves the binding performance of the PVDF resin to a positive electrode active substance and a current collector, reduces the rotational viscosity of an NMP solution, and reduces the requirements for the formulation and dispersion of a PVDF resin slurry.
Inventors:
WU YUPENG (CN)
HAN JINMING (CN)
MA CONGLI (CN)
WU ZHIGANG (CN)
SU LANHUI (CN)
WANG JINMING (CN)
WANG ZHENGLIANG (CN)
ZHAO XINBEN (CN)
HAN JINMING (CN)
MA CONGLI (CN)
WU ZHIGANG (CN)
SU LANHUI (CN)
WANG JINMING (CN)
WANG ZHENGLIANG (CN)
ZHAO XINBEN (CN)
Application Number:
PCT/CN2021/101494
Publication Date:
March 03, 2022
Filing Date:
June 22, 2021
Export Citation:
Assignee:
ZHEJIANG QUZHOU JUSU CHEMICAL IND CO LTD (CN)
ZHEJIANG JUHUA TECH CENTER CO LTD (CN)
ZHEJIANG JUHUA CO LTD ELECTROCHEMISTRY PLANT (CN)
ZHEJIANG JUHUA TECH CENTER CO LTD (CN)
ZHEJIANG JUHUA CO LTD ELECTROCHEMISTRY PLANT (CN)
International Classes:
C08F214/22; C08F2/20; C08F2/44; C08F214/06; C08F220/06; C08F220/14; C08F220/18; C08F220/44; C08J3/24; H01M4/62; H01M10/052
Foreign References:
| CN112175127A | 2021-01-05 | |||
| CN112159493A | 2021-01-01 | |||
| CN104497190A | 2015-04-08 | |||
| CN1267309A | 2000-09-20 | |||
| US20100133482A1 | 2010-06-03 | |||
| US20100270509A1 | 2010-10-28 | |||
| US5093427A | 1992-03-03 | |||
| CN104530276A | 2015-04-22 | |||
| CN106450327A | 2017-02-22 | |||
| CN110797537A | 2020-02-14 |
Attorney, Agent or Firm:
NINGBO AOSHENG PATENT AGENT COMPANY LIMITED. (CN)
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