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A kind of single ion polymer electrolyte and preparation method thereof, single ion polymer electrolyte membrane, 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: 2019-12-27
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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  • A kind of single ion polymer electrolyte and preparation method thereof, single ion polymer electrolyte membrane, lithium ion battery
  • A kind of single ion polymer electrolyte and preparation method thereof, single ion polymer electrolyte membrane, lithium ion battery
  • A kind of single ion polymer electrolyte and preparation method thereof, single ion polymer electrolyte membrane, lithium ion battery

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Experimental program
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Embodiment 1

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

[0093] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units 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 No. 1 or No. 2 position on a structural unit of the polymer chain, and the other end is connected to the No. 1 or No. 2 position on a structural unit of another polymer chain. Among the structural units that are not connected to the membrane support group on the polymer chain, a lithium ion-donating group is connected to the No. 1 position of the structural unit of a part of the polymer chain, and a lithium ion-providing group is connected to the No. 2 position of th...

Embodiment 2

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

[0111] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units 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 No. 1 or No. 2 position on a structural unit of the polymer chain, and the other end is connected to the No. 1 or No. 2 position on a structural unit of another polymer chain. Among the structural units that are not connected to the membrane support group on the polymer chain, a lithium ion-donating group is connected to the No. 1 position of the structural unit of a part of the polymer chain, and a lithium ion-providing group is connected to the No. 2 position of th...

Embodiment 3

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

[0129] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units 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 No. 1 or No. 2 position on a structural unit of the polymer chain, and the other end is connected to the No. 1 or No. 2 position on a structural unit of another polymer chain. Among the structural units that are not connected to the membrane support group on the polymer chain, a lithium ion-donating group is connected to the No. 1 position of the structural unit of a part of the polymer chain, and a lithium ion-providing group is connected to the No. 2 position of th...

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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 in particular 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 machinability, but also can overcome the shortcomings of liquid electrolytes such as easy leakage, difficult processing and sealing, and short life. An important electrolyte material for the technical performance bottleneck of lithium-ion batteries. [0003] Li-ion migration number is an indispensable parameter in the research of lithium-ion batteries. The lithium ion migration number of many systems is very small, approximately between 0.1 and 0.4. However, during the charge and discharge process, the anions do not participate in the reaction of the electrode, and will gather at the electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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