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Recyclable self-repairing gel-state electrolyte as well as preparation method and application thereof

A technology of gel state and electrolyte, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, sustainable manufacturing/processing, etc., can solve the problems of high environmental requirements, harsh environments, single performance, etc. The effect of safety and service life

Active Publication Date: 2021-07-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the technical problems of the existing materials and methods, such as harsh preparation methods, single performance, or high requirements for the use environment, and provide a recyclable self-repairing gel state electrolyte with simple method and good performance. Its preparation method and application

Method used

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  • Recyclable self-repairing gel-state electrolyte as well as preparation method and application thereof
  • Recyclable self-repairing gel-state electrolyte as well as preparation method and application thereof
  • Recyclable self-repairing gel-state electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Stir and mix DGEBA and PEGDGE with a molar ratio of 1:1.

[0029] (2) Add PEG200 and 1:2 2-AFD at a mass ratio of 1:2 to epoxy resin to the solution obtained in (1), and stir and mix at 90°C.

[0030] (3) Cast the solution obtained in (1) on a polytetrafluoroethylene plate, place gaskets around it, place another polytetrafluoroethylene plate on the gasket to form a sandwich structure, and place it in a blast oven , heating at 130°C for 2 hours and 150°C for 2 hours to prepare a film, soak the film in deionized water for three days, and dry to obtain an unactivated electrolyte.

[0031] (4) Transfer the film to the glove box, soak the electrolyte (the electrolyte is a mixed solution of lithium hexafluorophosphate mixed with dimethyl carbonate, ethyl methyl carbonate and ethylene carbonate, and its mass ratio is dimethyl carbonate: ethyl methyl carbonate : Ethylene carbonate = 1:1:1, concentration 1M) for 24 hours. The final result is a gel-state polymer electrolyte...

Embodiment 2

[0033] (1) Stir and mix DGEBA and PEGDGE with a molar ratio of 1:9.

[0034] (2) Add PEG200 with a mass ratio of 1:2 to epoxy resin and 2-AFD with a mass ratio of 2:1 to the solution obtained in (1), and stir and mix at 90°C.

[0035] (3) Cast the solution obtained in (1) on a polytetrafluoroethylene plate, place gaskets around it, place another polytetrafluoroethylene plate on the gasket to form a sandwich structure, and place it in a blast oven , heating at 130°C for 2 hours and 150°C for 2 hours to prepare a film, soak the film in deionized water for three days, and dry to obtain an unactivated electrolyte.

[0036] (4) Transfer the film to the glove box, soak the electrolyte (the electrolyte is a mixed solution of lithium hexafluorophosphate mixed with dimethyl carbonate, ethyl methyl carbonate and ethylene carbonate, and its mass ratio is dimethyl carbonate: ethyl methyl carbonate : Ethylene carbonate = 1:1:1, concentration 1M) for 24 hours. The final result is a gel-stat...

Embodiment 3

[0038] (1) Stir and mix DGEBA and PEGDGE with a molar ratio of 1:9.

[0039] (2) Add PEG200 and 2:1 2-AFD at a mass ratio of 2:1 to epoxy resin to the solution obtained in (1), and stir and mix at 90°C.

[0040] (3) Cast the solution obtained in (1) on a polytetrafluoroethylene plate, place gaskets around it, place another polytetrafluoroethylene plate on the gasket to form a sandwich structure, and place it in a blast oven , heating at 130°C for 2 hours and 150°C for 2 hours to prepare a film, soak the film in deionized water for three days, and dry to obtain an unactivated electrolyte.

[0041] (4) Transfer the film to the glove box, soak the electrolyte (the electrolyte is a mixed solution of lithium hexafluorophosphate mixed with dimethyl carbonate, ethyl methyl carbonate and ethylene carbonate, and its mass ratio is dimethyl carbonate: ethyl methyl carbonate : Ethylene carbonate = 1:1:1, concentration 1M) for 24 hours. The final result is a gel-state polymer electrolyte...

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Abstract

The invention relates to a recoverable self-repairing gel-state electrolyte and a preparation method and application thereof, and solves the technical problems of harsh environment requirement, single performance or higher use environment requirement of the preparation method of the existing electrolyte, the recoverable self-repairing gel-state electrolyte contains epoxy resin and a cross-linking agent, the epoxy resin is one or a combination of more of DGEBA, PEGDGE, DGEBF, DGEBS, EPS25 and EPS70; and the cross-linking agent is one or a combination of more of 4-AFD, 2-AFD, DTDA, MPD, DETA, DDM and IPD. The invention also provides a preparation method and application thereof. The method can be applied to the field of preparation of battery materials.

Description

technical field [0001] The invention relates to a battery material and its preparation method and application, in particular to a recyclable self-repairing gel state electrolyte and its preparation method and application. Background technique [0002] With the development of society, the market has higher requirements for the energy density of energy storage equipment. Due to the high specific capacity, low electrode potential, and low density of lithium metal, lithium metal batteries are considered to be ideal candidates for next-generation batteries. However, the uncontrollable growth of lithium dendrites will cause the battery to short circuit, resulting in the burning of the liquid electrolyte and the explosion of the battery. Compared with liquid electrolytes, quasi-solid electrolytes can inhibit the growth of lithium dendrites and play an important role in improving battery safety. [0003] In recent years, the research of self-healing materials has attracted more an...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/052H01M10/058
CPCH01M10/052H01M10/0565H01M10/058Y02P70/50
Inventor 兰金叻孙卓凡杨小平于运花
Owner BEIJING UNIV OF CHEM TECH
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