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Preparation method of in situ cross-linked fluoropolymer gel electrolyte membrane induced by garnet coordination Lewis base

A gel electrolyte and Lewis base technology, which is applied in the direction of electrolyte immobilization/gelation, circuits, electrical components, etc., can solve the problems of environmental hazards and increased costs, and achieve strong liquid retention capacity, high liquid content, and good capacity Effects of retention and cycle life

Active Publication Date: 2021-03-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods need to use a large amount of toxic and harmful organic solvents in the preparation process, which is harmful to the environment and increases the cost

Method used

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  • Preparation method of in situ cross-linked fluoropolymer gel electrolyte membrane induced by garnet coordination Lewis base
  • Preparation method of in situ cross-linked fluoropolymer gel electrolyte membrane induced by garnet coordination Lewis base
  • Preparation method of in situ cross-linked fluoropolymer gel electrolyte membrane induced by garnet coordination Lewis base

Examples

Experimental program
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Effect test

Embodiment 1

[0044] This example relates to a method for preparing an in-situ cross-linked fluoropolymer gel electrolyte membrane induced by a garnet-coordinated Lewis base. The method includes the following steps:

[0045] (1) Add 10g of DMF into a 20ml black cap bottle, weigh 2g of fluoropolymer polyvinylidene fluoride (PVDF), add PVDF into DMF, stir until fully dissolved, and form a DMF solution of PVDF;

[0046] (2) Weigh lithium perchlorate LiCLO 4 0.4g, add lithium perchlorate into the above PVDF solution, stir until the lithium salt is fully dissolved, and obtain precursor slurry A;

[0047] (3) Weigh 3.6 g of LLZO-Ga powder, add it into 36 g of DMF, and stir evenly for 6 hours to obtain gel electrolyte precursor slurry B.

[0048] (4) The above precursor slurry A and B were mixed and stirred for 6 hours, poured into a plastic mold, sealed and left to stand for 48 hours. After the slurry was completely solidified, it was demoulded and sliced ​​to obtain an in-situ cross-linked fl...

Embodiment 2

[0059] This embodiment 2 relates to a preparation method for in-situ cross-linked fluoropolymer gel electrolyte membrane induced by garnet coordination Lewis base, the method comprising the following steps:

[0060] (1) Add 10g of DMF into a 20ml black cap bottle, weigh 2g of fluoropolymer polyvinylidene fluoride (PVDF), add PVDF into DMF, stir until fully dissolved, and form a DMF solution of PVDF;

[0061] (2) Weigh lithium perchlorate LiCLO 4 0.4g, add lithium perchlorate into the above PVDF solution, stir until the lithium salt is fully dissolved, and obtain precursor slurry A;

[0062] (3) Weigh 1.6g of LLZO-Ga powder, add it into 16g of DMF, and stir evenly for 6 hours to obtain gel electrolyte precursor slurry B;

[0063] (4) The above precursor slurry was mixed and stirred for 6 hours, injected into a plastic mold, sealed and left to stand for 48 hours. After the slurry was completely solidified, it was demoulded and sliced ​​to obtain an in-situ cross-linked fluoro...

Embodiment 3

[0066] This embodiment 3 relates to a preparation method for in-situ cross-linked fluoropolymer gel electrolyte membrane induced by garnet coordination Lewis base, the method comprising the following steps:

[0067] (1) Add 10g of TEP into a 20ml black cap bottle, weigh 2g of fluoropolymer polyvinylidene fluoride (PVDF), add PVDF into DMF, stir until fully dissolved, and form a DMF solution of PVDF;

[0068] (2) Weigh lithium perchlorate LiCLO 4 0.4g, add lithium perchlorate into the above PVDF solution, stir until the lithium salt is fully dissolved, and obtain precursor slurry A;

[0069] (3) Weigh 5.6g of LLZO-Ga powder, add it into 56g of TEP, and stir evenly for 6 hours to obtain gel electrolyte precursor slurry B;

[0070] (4) The above precursor slurry was mixed and stirred for 6 hours, injected into a plastic mold, sealed and left to stand for 48 hours. After the slurry was completely solidified, it was demoulded and sliced ​​to obtain an in-situ cross-linked fluoro...

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Abstract

The invention relates to a preparation method of a garnet coordination lewis base-induced in-situ cross-linked fluoropolymer gel electrolyte membrane; the preparation method comprises the following steps of (1) carrying out mixing on a lithium salt and a fluoropolymer solution to obtain a precursor solution A; (2) mixing the precursor solution A with a precursor slurry B containing a garnet type electrolyte to obtain a gel electrolyte precursor slurry; and (3) casting the obtained gel electrolyte precursor slurry on a substrate to form a film, and curing the film, so as to obtain the garnet coordination lewis base-induced in-situ cross-linked fluoropolymer gel electrolyte membrane, wherein the solvent of the garnet type electrolyte-containing precursor slurry B is a strong-polarity organicsolvent.

Description

technical field [0001] The invention relates to a preparation method of an in-situ cross-linked fluoropolymer gel electrolyte membrane induced by a garnet coordination Lewis base and a lithium ion battery containing the gel electrolyte membrane, belonging to polymer gel electrolytes for lithium secondary batteries field. Background technique [0002] With the continuous advancement of social science and technology, energy shortage and environmental problems have become increasingly prominent and have attracted the attention of various countries around the world. In response to environmental problems, the development of new energy vehicles has gradually become the focus of all walks of life. Electric energy storage system, as the core component of new energy vehicles, has also received extensive attention. [0003] Lithium-ion batteries currently in use are based on liquid electrolytes. In use, its main disadvantages are gradually known by people. Safety issues such as li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/056H01M10/0525
CPCH01M10/0525H01M10/056H01M2300/0085Y02E60/10
Inventor 温兆银徐东苏建猛靳俊吴梅芬
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI