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Functional polymer, polymer electrolyte membrane, flame-retardant polymer electrolyte composite membrane and preparation method thereof, and lithium ion battery

A technology of functional polymer and flame retardant polymer, applied in electrolyte, secondary battery, secondary battery repair/maintenance, etc., can solve problems such as fire explosion and low internal resistance

Active Publication Date: 2018-07-31
DO FLUORIDE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymer electrolyte membrane has the advantages of strong liquid absorption, strong ion conductivity, and small internal resistance, but the polymer electrolyte membrane still needs to use a plasticizer, and the plasticizer is easy to burn, so there is a danger of fire and explosion

Method used

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  • Functional polymer, polymer electrolyte membrane, flame-retardant polymer electrolyte composite membrane and preparation method thereof, and lithium ion battery
  • Functional polymer, polymer electrolyte membrane, flame-retardant polymer electrolyte composite membrane and preparation method thereof, and lithium ion battery
  • Functional polymer, polymer electrolyte membrane, flame-retardant polymer electrolyte composite membrane and preparation method thereof, and lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0093] The functional polymer in this embodiment includes a polymer chain composed of structural units as shown in formula 1, a flame retardant group is connected to the No. 1 position of the structural unit on a part of the chain segment, and a flame retardant group is The No. 2 position of the structural unit is connected with a lithium ion conductive group, and the No. 2 position of the structural unit on some chain segments is connected with a flame retardant group, and there are also part of the structural unit 1 on the chain segment. Lithium-ion conductive groups are connected to the position; wherein, the molar ratio of the flame-retardant group to the lithium-ion conductive group is 1:4, and the flame-retardant group has the structure shown in formula 2, and the chemical formula of R is CH 3 ; The lithium ion conducting group has a structure as shown in formula 3, wherein m=10. There are capping groups connected to both ends of the polymer chain, and the capping group ...

Embodiment 2

[0105] The functional polymer in this embodiment includes a polymer chain composed of structural units as shown in formula 1, a flame retardant group is connected to the No. 1 position of the structural unit on a part of the chain segment, and a flame retardant group is The No. 2 position of the structural unit is connected with a lithium ion conductive group, and the No. 2 position of the structural unit on some chain segments is connected with a flame retardant group, and there are also part of the structural unit 1 on the chain segment. Lithium ion conductive groups are connected to the position; wherein, the molar ratio of the flame retardant group to the lithium ion conductive group is 1:2, the flame retardant group has the structure shown in formula 2, and the chemical formula of R is C 2 h 5 ; The lithium ion conducting group has a structure as shown in formula 3, wherein m=7. There are capping groups connected to both ends of the polymer chain, and the capping group a...

Embodiment 3

[0116] The functional polymer in this embodiment includes a polymer chain composed of structural units as shown in formula 1, a flame retardant group is connected to the No. 1 position of the structural unit on a part of the chain segment, and a flame retardant group is The No. 2 position of the structural unit is connected with a lithium ion conductive group, and the No. 2 position of the structural unit on some chain segments is connected with a flame retardant group, and there are also part of the structural unit 1 on the chain segment. Lithium-ion conductive groups are connected to the position; wherein, the molar ratio of the flame-retardant group to the lithium-ion conductive group is 1:3.5, and the flame-retardant group has the structure shown in formula 2, and the chemical formula of R is C 3 h 7 ; The lithium ion conducting group has a structure as shown in formula 3, wherein m=16. There are capping groups connected to both ends of the polymer chain, and the capping ...

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Abstract

The invention relates to a functional polymer, a polymer electrolyte membrane, a flame-retardant polymer electrolyte composite membrane and a preparation method thereof, and a lithium ion battery, andbelongs to the technical field of lithium ion batteries. The functional polymer comprises a polymer chain composed of structural units. A flame-retardant group and a lithium ion-conducting group areconnected to the site 1 or 2 of the structural unit of the polymer chain. A mole ratio of the flame-retardant group to the lithium ion-conducting group is 1: (2 to 4). The flame-retardant group provides a good flame-retardant function for the functional polymer. The lithium ion-conducting group can accelerate a transport velocity of Li<+> in the functional polymer. The flame-retardant polymer electrolyte composite membrane has the advantages of high electrical conductivity and strong flame retardant properties and has a potential application value in the field of lithium ion batteries.

Description

technical field [0001] The invention relates to a functional polymer, a polymer electrolyte membrane, a flame-retardant polymer electrolyte composite membrane, a preparation method thereof, and a lithium ion battery, belonging to the technical field of lithium ion batteries. Background technique [0002] Compared with other secondary batteries, lithium-ion batteries have the characteristics of high energy density, high output voltage, large output power, small self-discharge effect, environmental friendliness, wide operating temperature, and no memory. Since 1991, it has been realized by Sony Corporation of Japan Since its inception, it has been widely used in portable electronic devices such as mobile phones and notebook computers. Moreover, lithium-ion batteries have excellent application prospects as power batteries in hybrid electric vehicles, plug-in hybrid electric vehicles and pure electric vehicles. [0003] In the prior art, the commonly used electrolyte is an orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/08H01M10/0525H01M10/0565H01M10/42
CPCC08G61/08C08G2261/12C08G2261/1424C08G2261/1426C08G2261/147C08G2261/3324C08G2261/418H01M10/0525H01M10/0565H01M10/4235H01M2300/0094Y02E60/10
Inventor 侯红军薛旭金王永勤杨华春刘海霞薛峰峰李霞郭贤慧马广辉杨明霞
Owner DO FLUORIDE CHEM CO LTD
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