Title:
COMPOSITE POLYIMIDE SEPARATOR AND PREPARATION METHOD THEREFOR, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/071706
Kind Code:
A1
Abstract:
Provided in the present application are a composite polyimide separator and a preparation method therefor, and a secondary battery. The preparation method for the composite polyimide separator comprises: providing a porous polyamic acid membrane; and subjecting an aqueous diamine solution and an organic acyl chloride solution to an interfacial polymerization reaction on a face of the porous polyamic acid membrane, so as to obtain a composite polyamic acid separator; and placing the composite polyamic acid separator in steam of an imidization reagent, and subjecting same to an imidization treatment to obtain a composite polyimide separator. In the present application, by means of controlling the parameters of an interfacial polymerization reaction, a composite polyamic acid separator with a dense surface, a loose bottom and an adjustable surface pore size can be obtained.
Inventors:
LI SHIDA (CN)
ZHONG QINENG (CN)
YANG LIMEI (CN)
WU YICHEN (CN)
XUE YIFAN (CN)
ZHONG QINENG (CN)
YANG LIMEI (CN)
WU YICHEN (CN)
XUE YIFAN (CN)
Application Number:
PCT/CN2022/123066
Publication Date:
May 04, 2023
Filing Date:
September 30, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
C08L79/08; C08G73/10; C08J5/18
Foreign References:
| CN110828750A | 2020-02-21 | |||
| CN111234278A | 2020-06-05 | |||
| CN103172891A | 2013-06-26 | |||
| CN105944579A | 2016-09-21 | |||
| JP2004139867A | 2004-05-13 | |||
| TW201813993A | 2018-04-16 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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