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Single-ion polymer electrolyte, preparation method thereof, single-ion polymer electrolyte membrane and lithium ion battery

A technology of electrolyte membrane and polymer, which is applied in the field of lithium-ion batteries and can solve the problems of macroscopic phase separation of composite electrolytes

Active Publication Date: 2017-09-08
DO FLUORIDE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite electrolyte will cause macroscopic phase separation and other problems during the long-term cycle of the battery.

Method used

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  • Single-ion polymer electrolyte, preparation method thereof, single-ion polymer electrolyte membrane and lithium ion battery
  • Single-ion polymer electrolyte, preparation method thereof, single-ion polymer electrolyte membrane and lithium ion battery
  • Single-ion polymer electrolyte, preparation method thereof, single-ion polymer electrolyte membrane and lithium ion battery

Examples

Experimental program
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Embodiment 1

[0092] The single-ion polymer electrolyte of this embodiment is composed of many polymer chains, and the polymer chains are cross-linked with each other to form a single-ion polymer electrolyte with a three-dimensional network cross-linked structure.

[0093] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units as shown in formula 1, and a membrane support group is connected between the two polymer chains. Specifically, one end of the membrane support group is connected to a The 1st position or the 2nd position of one structural unit on the polymer chain, and the other end is connected to the 1st position or the 2nd position on a structural unit of another polymer chain. In the structural unit without membrane supporting group connected to the polymer chain, a lithium ion donating group is connected to the 1st position of the structural unit of a part of the polymer chain, and to the 2nd position of the structural unit of a...

Embodiment 2

[0110] The single-ion polymer electrolyte of this embodiment is composed of many polymer chains, and the polymer chains are cross-linked with each other to form a single-ion polymer electrolyte with a three-dimensional network cross-linked structure.

[0111] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units as shown in formula 1, and a membrane support group is connected between the two polymer chains. Specifically, one end of the membrane support group is connected to a The 1st position or the 2nd position of one structural unit on the polymer chain, and the other end is connected to the 1st position or the 2nd position on a structural unit of another polymer chain. In the structural unit without membrane supporting group connected to the polymer chain, a lithium ion donating group is connected to the 1st position of the structural unit of a part of the polymer chain, and to the 2nd position of the structural unit of a...

Embodiment 3

[0128] The single-ion polymer electrolyte of this embodiment is composed of many polymer chains, and the polymer chains are cross-linked with each other to form a single-ion polymer electrolyte with a three-dimensional network cross-linked structure.

[0129] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units as shown in formula 1, and a membrane support group is connected between the two polymer chains. Specifically, one end of the membrane support group is connected to a The 1st position or the 2nd position of one structural unit on the polymer chain, and the other end is connected to the 1st position or the 2nd position on a structural unit of another polymer chain. In the structural unit without membrane supporting group connected to the polymer chain, a lithium ion donating group is connected to the 1st position of the structural unit of a part of the polymer chain, and to the 2nd position of the structural unit of a...

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Abstract

The invention belongs to the technical field of lithium ion batteries and particularly relates to a single-ion polymer electrolyte, a preparation method thereof, a single-ion polymer electrolyte membrane and a lithium ion battery. The single-ion polymer electrolyte comprises polymer chains formed by structure units represented by formula 1 (shown in the description), wherein membrane supporting groups are linked between the two polymer chains, and two ends of the membrane supporting groups are respectively connected to sites 1 or 2 of the structure units; lithium ion providing groups are connected to the sites 1 or 2 of the structure units; the lithium ion providing groups and the membrane supporting groups are respectively connected to the site 1 or 2 of each independent structure unit; and the molar ratio of the lithium ion providing groups to the membrane supporting groups is 1 to (1-2). The single-ion polymer electrolyte has the advantages of high room temperature conductivity, mechanical strength and flame retardance and the like and further has very considerable application prospects in the field of the lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and particularly relates to a single ion polymer electrolyte and a preparation method thereof, a single ion polymer electrolyte membrane and a lithium ion battery. Background technique [0002] Compared with liquid electrolytes, solid polymer electrolytes not only have lighter weight and good mechanical processing properties, but also overcome the shortcomings of liquid electrolytes, such as easy leakage, difficult processing and sealing, and short lifespan. An important electrolyte material for the technical performance bottleneck of lithium-ion batteries. [0003] Li-ion migration number is an indispensable parameter in Li-ion battery research. The lithium ion migration number of many systems is very small, about 0.1 to 0.4. However, in the process of charging and discharging, the anions do not participate in the reaction of the electrode, and will accumulate at the electrode / el...

Claims

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Application Information

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IPC IPC(8): C08G61/08C08J5/18C08L65/00H01M10/0565H01M10/0525
CPCC08G61/08C08G2261/12C08G2261/1424C08G2261/147C08G2261/3324C08G2261/371C08G2261/418C08G2261/516C08G2261/72C08G2261/76C08J5/18C08J2365/00H01M10/0525H01M10/0565H01M2300/0082Y02E60/10
Inventor 王永勤薛旭金侯红军薛峰峰王建萍刘海霞杨水艳翟尚宇侯宾孙玉娟
Owner DO FLUORIDE CHEM CO LTD
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