Single ion polymer electrolyte, single ion polymer electrolyte composite film and preparation method thereof, and lithium ion battery

A polymer and single-ion technology, applied in the field of lithium-ion batteries, can solve problems such as low conductivity

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

[0007] Therefore, the problem of low conductivity is a problem that has always existed in the preparation process of single-ion polymer electrolyte membranes.

Method used

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  • Single ion polymer electrolyte, single ion polymer electrolyte composite film and preparation method thereof, and lithium ion battery
  • Single ion polymer electrolyte, single ion polymer electrolyte composite film and preparation method thereof, and lithium ion battery
  • Single ion polymer electrolyte, single ion polymer electrolyte composite film and preparation method thereof, and lithium ion battery

Examples

Experimental program
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Embodiment 1

[0077] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units shown in formula 1, a lithium ion-donating group is connected to the No. 1 position of a part of the structural units, and Lithium ion conducting group is connected to position 1, lithium ion donating group is connected to position 2 of some structural units, and lithium ion conducting group is connected to position 2 of another part of the structural unit . The molar ratio of lithium ion donating groups to lithium ion conducting groups is 1:2.

[0078] The lithium ion donating group has the structure shown in Formula 2. The lithium ion conducting group has the structure shown in formula 3, wherein m=10.

[0079] The single-ion polymer electrolyte membrane in this embodiment is composed of the following components: a single-ion polymer electrolyte and polyvinylidene fluoride-hexafluoropropylene, and the mass ratio of the single-ion polymer electrolyte to polyvin...

Embodiment 2

[0089] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units shown in formula 1, a lithium ion-donating group is connected to the No. 1 position of a part of the structural units, and Lithium ion conducting group is connected to position 1, lithium ion donating group is connected to position 2 of some structural units, and lithium ion conducting group is connected to position 2 of another part of the structural unit . The molar ratio of lithium ion donating groups to lithium ion conducting groups is 1:1.

[0090] The lithium ion donating group has the structure shown in Formula 2. The lithium ion conducting group has the structure shown in formula 3, wherein m=14.

[0091] The single-ion polymer electrolyte membrane in this embodiment is composed of the following components: a single-ion polymer electrolyte and polyvinylidene fluoride-hexafluoropropylene, and the mass ratio of the single-ion polymer electrolyte to polyvin...

Embodiment 3

[0100] The single-ion polymer electrolyte in this embodiment includes a polymer chain composed of structural units shown in formula 1, a lithium ion-donating group is connected to the No. 1 position of a part of the structural units, and Lithium ion conducting group is connected to position 1, lithium ion donating group is connected to position 2 of some structural units, and lithium ion conducting group is connected to position 2 of another part of the structural unit . The molar ratio of lithium ion donating groups to lithium ion conducting groups is 2:1.

[0101] The lithium ion donating group has the structure shown in Formula 2. The lithium ion conducting group has the structure shown in formula 3, wherein m=16.

[0102] The single-ion polymer electrolyte membrane in this embodiment is composed of the following components: a single-ion polymer electrolyte and polyvinylidene fluoride-hexafluoropropylene, and the mass ratio of the single-ion polymer electrolyte to polyvin...

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Abstract

The invention relates to a single ion polymer electrolyte, a single ion polymer electrolyte composite film and a preparation method thereof and a lithium ion battery, and belongs to the technical field of lithium ion batteries. The single ion polymer electrolyte comprises a polymer chain composed of structural units, 1# or 2# position of the structural unit of the polymer chain is connected with alithium ion providing group and a lithium ion conductive group, and the molar ratio of lithium ion providing group to lithium ion conductive group is 1: (0.5 to 2). The uniform distribution of a lithium source of the single ion polymer electrolyte composite film ensures the integral electrical conductivity of the single ion polymer electrolyte composite film. The oxirane group and the lithium phosphate group of the single ion polymer electrolyte composite film provide the electrolyte with good electrical conductivity, flame retardancy and high mechanical properties. The single ion polymer electrolyte composite film has potential application value in the lithium ion batteries.

Description

technical field [0001] The invention relates to a single-ion polymer electrolyte, a single-ion 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] Lithium-ion batteries have the advantages of high energy density, high output power, small self-discharge, no memory effect, wide operating temperature range and high average output voltage, etc., which have become more and more research hotspots. At present, lithium-ion batteries are widely used in portable electronic devices such as notebook computers and smart phones. batteries are widely used. [0003] Lithium-ion battery electrolytes can be divided into liquid electrolytes and polymer electrolytes. Among them, the liquid electrolyte has a high degree of commercialization and relatively mature development, and is generally formed by dissolving an appropriate lithium salt in an organic aprotic ...

Claims

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Application Information

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IPC IPC(8): C08G61/08C08L27/16C08L65/00C08J5/18H01M10/0565H01M10/0525
CPCC08G61/08C08G2261/12C08G2261/1424C08G2261/147C08G2261/1522C08G2261/3324C08G2261/418C08G2261/516C08G2261/72C08J5/18C08J2327/16C08J2365/00C08J2465/00C08L27/16C08L65/00C08L2203/16H01M10/0525H01M10/0565H01M2300/0085Y02E60/10
Inventor 侯红军薛旭金刘海庆王永勤罗传军薛峰峰马广辉耿梦湍程立静杨明霞
Owner DO FLUORIDE CHEM CO LTD
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