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Polyimide lithium battery composite membrane containing pyridine ring and battery thereof

A lithium polyimide, composite diaphragm technology, applied in battery pack parts, separators/films/diaphragms/spacers, circuits, etc., can solve problems such as longitudinal tensile properties, insufficient air permeability, and incompatibility , to achieve the effect of improving performance, reducing negative effects and improving tensile properties

Inactive Publication Date: 2017-07-14
DEYANG JIUDING ZHIYUAN INTPROP OPERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile properties of this separator, especially the longitudinal tensile properties and air permeability, are insufficient to a certain extent, which is not suitable for the current needs of lithium batteries, especially in the application of new energy vehicles.

Method used

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  • Polyimide lithium battery composite membrane containing pyridine ring and battery thereof
  • Polyimide lithium battery composite membrane containing pyridine ring and battery thereof
  • Polyimide lithium battery composite membrane containing pyridine ring and battery thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0050] Specific embodiment 1: This embodiment discloses a polyimide lithium battery composite diaphragm containing a pyridine ring. The lithium battery composite diaphragm includes a reinforced film and a base film, and the base film is a polyimide lithium battery containing a pyridine ring. The imide base film, the reinforcing film is a non-woven film.

[0051] The base film is prepared from diamine monomers containing pyridine rings and dianhydride monomers. The structure of the diamine monomers is as follows:

[0052]

[0053] Described preparation method is as follows:

[0054] Step 1: Add a diamine monomer containing a pyridine ring into a high-boiling protic solvent under an inert gas environment, stir to completely dissolve the diamine monomer, and then add a dianhydride monomer, and the diamine monomer containing a pyridine ring The molar ratio of the amine monomer to the dianhydride monomer is 1:1, wherein the dianhydride monomer is added in equal amounts twice wi...

specific Embodiment 2

[0060]Specific embodiment 2: This embodiment discloses a polyimide lithium battery composite diaphragm containing a pyridine ring. The lithium battery composite diaphragm includes a reinforced film and a base film, and the base film is a polyimide lithium battery containing a pyridine ring. The imide base film, the reinforcing film is a non-woven film.

[0061] The base film is prepared from diamine monomers containing pyridine rings and dianhydride monomers. The structure of the diamine monomers is as follows:

[0062]

[0063] Described preparation method is as follows:

[0064] Step 1: Add a diamine monomer containing a pyridine ring into a high-boiling protic solvent under an inert gas environment, stir to completely dissolve the diamine monomer, and then add a dianhydride monomer, and the diamine monomer containing a pyridine ring The molar ratio of the amine monomer to the dianhydride monomer is 1:1, wherein the dianhydride monomer is added in 5 equal amounts within ...

specific Embodiment 3

[0070] Specific embodiment 3: This embodiment discloses a polyimide lithium battery composite diaphragm containing a pyridine ring. The lithium battery composite diaphragm includes a reinforced film and a base film, and the base film is a polyimide lithium battery containing a pyridine ring. The imide base film, the reinforcing film is a non-woven film.

[0071] The base film is prepared from diamine monomers containing pyridine rings and dianhydride monomers. The structure of the diamine monomers is as follows:

[0072]

[0073] Described preparation method is as follows:

[0074] Step 1: Add a diamine monomer containing a pyridine ring into a high-boiling protic solvent under an inert gas environment, stir to completely dissolve the diamine monomer, and then add a dianhydride monomer, and the diamine monomer containing a pyridine ring The molar ratio of the amine monomer to the dianhydride monomer is 1:1, wherein the dianhydride monomer is added in 4 equal amounts within...

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Abstract

The invention discloses a polyimide lithium battery composite membrane containing a pyridine ring, belongs to the battery field, and aims to solve the problem that the battery membrane is poor in performance and the battery is prone to accidents. The lithium battery composite membrane comprises a reinforced membrane and a basement membrane, wherein the basement membrane is a polyimide basement membrane containing a pyridine ring, and the reinforced membrane is a non-woven membrane.

Description

technical field [0001] The invention relates to the field of lithium batteries. Background technique [0002] In the structure of lithium batteries, the separator is one of the key inner components. For the lithium battery series, since the electrolyte is an organic solvent system, a separator material resistant to organic solvents is required, and polyolefin porous membranes are generally used. [0003] However, the strength of the polyolefin porous membrane is not enough, the pore size is uneven, and the battery is prone to failure during use, so polyimide lithium battery membranes have appeared. [0004] The application number is 201410147627.X, and the invention patent named a polyimide nano-lithium ion battery diaphragm preparation method and its product discloses a polyimide nano-lithium ion battery diaphragm preparation method and its product. The method comprises the following steps: preparation of polyamic acid solution: polycondensation of 4,4'-diaminodiphenyl et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M50/423H01M50/44H01M50/449
CPCH01M50/40H01M50/403H01M50/409H01M50/411Y02E60/10
Inventor 陈福彦
Owner DEYANG JIUDING ZHIYUAN INTPROP OPERATION CO LTD