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Polyurethane solid electrolyte as well as preparation method and application thereof

A solid electrolyte, polyurethane technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of poor lithium ion migration number and poor ion conductivity, and achieve high lithium ion migration number, high rate performance, easy to obtain. Effect

Active Publication Date: 2022-03-18
广东粤港澳大湾区黄埔材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a polyurethane solid electrolyte, which solves the problems of poor ion conductivity and lithium ion migration number of solid-state batteries; at the same time, it also improves the rate performance and long-term cycle stability of lithium-ion solid-state batteries

Method used

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  • Polyurethane solid electrolyte as well as preparation method and application thereof
  • Polyurethane solid electrolyte as well as preparation method and application thereof
  • Polyurethane solid electrolyte as well as preparation method and application thereof

Examples

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Embodiment 1

[0042] This embodiment provides a polyurethane solid electrolyte, which is prepared from the following weight of the following weight of the material: 60 parts of isocyanate, 300 copg, 5 catalysts, 18.5 parts of organometallic chromium MOF, chain extender I2, chain extender II8 parts, 500 solvents, 111 lithium salts. Among them, isocyanate is Chi-Timer; PPG molecular weight is 3000; organic chrome MOF is MIL-101 (CR), purchased from Suzhou Technology Nano Development Co., Ltd .; catalyst is dilasic titsalate; chain extender I Pyrrolidyl di amminopyrimidine oxide, chain extender II is MoCA; lithium salt is a litfsi: solvent is ethyl acetate.

[0043] The preparation method of the polyurethane solid electrolyte this embodiment includes the steps of:

[0044] (1) Under nitrogen protection, 60 parts of isocyanate, 300 PPG, 5 catalysts, 18.5 parts of organometallic MOF, 1 chain extender I2, chain extender II, 500 parts of solvent, 111 parts of lithium salt after mixing At 70 ° C, the r...

Embodiment 2

[0048] This embodiment provides a polyurethane solid electrolyte, which is prepared from the following weight of the material: 78 parts of isocyanate, 300 PPG, 5 catalysts, 20 organometallic MOF, chain extender I4, chain extender 16 parts, 540 solvents, 120 lithium salts. Among them, isocyanate is Chi-Timer; PPG molecular weight is 3000; organic chrome MOF is MIL-101 (CR), purchased from Suzhou Technology Nano Development Co., Ltd .; catalyst is dilasic titsalate; chain extender I Pyrrolidyl di amminopyrimidine oxide, chain extender II is MoCA; lithium salt is a litfsi: solvent is ethyl acetate.

[0049] The preparation method of the polyurethane solid electrolyte this embodiment includes the steps of:

[0050] (1) Under nitrogen protection, 78 of isocyanate, 300 PPG, 5 catalysts, organometallic MOF 20 parts, chain extender I4, 16 parts of the chain extender, 540 solvents, 120 parts of lithium salt, At 70 ° C, the reaction was reacted at 800 rpm of the ultrasonic dispersion for 30...

Embodiment 3

[0054] This embodiment provides a polyurethane solid electrolyte, which is prepared from the following weight of the raw material: 96 isocyanates, 300 copgs of PPG, 5 catalysts, 22 parts of organometallic MOF, chain extender I6 parts, chain extenders Type II24 parts, 580 parts of solvent, 128 lithium salts. Among them, isocyanate is Chi-Timer; PPG molecular weight is 3000; organic chrome MOF is MIL-101 (CR), purchased from Suzhou Technology Nano Development Co., Ltd .; catalyst is dilasic titsalate; chain extender I Pyrrolidyl di amminopyrimidine oxide, chain extender II is MoCA; lithium salt is a litfsi: solvent is ethyl acetate.

[0055] The preparation method of the polyurethane solid electrolyte this embodiment includes the steps of:

[0056] (1) Under nitrogen protection, 96 parts of isocyanate, 300 PPG, 5 catalysts, and organometallic chromium MOF22 parts, chain extender I6 parts, laulinant II24 parts, 580 parts of solvent, 120 parts of lithium salt, At 70 ° C, the reaction ...

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Abstract

The invention belongs to the field of lithium batteries, and discloses a polyurethane solid electrolyte as well as a preparation method and application thereof. The solid electrolyte comprises the following components: isocyanate, polyether polyol, a catalyst, organic metal chromium MOF, a chain extender I, a chain extender II, a lithium salt and an organic solvent. The lithium ion solid-state battery prepared from the polyurethane solid-state electrolyte has relatively high ionic conductivity and relatively high lithium ion transference number; and meanwhile, the material has high rate capability and long-acting cycle stability. The raw materials are easy to obtain, the synthesis operation is simple, and the method is suitable for industrial production and application.

Description

Technical field [0001] The present invention belongs to the field of lithium battery, involving a polyurethane solid electrolyte and a preparation method thereof. Background technique [0002] Lithium-ion batteries are the most widely used batteries in digital products such as mobile phones, laptops, which consist of positive electrodes, diaphragms, negative electrodes, and electrolytes. The existing lithium ion batteries are mainly based on liquid electrolytes and gel electrolytes, but the liquid electrolyte and the gel electrolyte have a flammable and explosive risk, so a lithium ion solid battery having a higher safety performance is necessary. However, the existing solid state cells have problems with poor interface performance, low ionic conductivity, and insufficient lithium ion migration, and severely affect the electrical properties of lithium ion solids batteries. Inventive content [0003] The present invention provides a polyurethane solid electrolyte to solve problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32H01M10/0565H01M10/0525
CPCC08G18/6685C08G18/48C08G18/3848C08G18/3814H01M10/0565H01M10/0525Y02E60/10
Inventor 崔庆实张淑雅萧景驰黄泽熹王杰袁黎光杨小牛
Owner 广东粤港澳大湾区黄埔材料研究院
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