Self-repairing adhesive and preparation method and application thereof

An adhesive and self-healing technology, applied in the field of chemical energy storage, can solve the problems of volume expansion of alloy-type electrode materials, and achieve the effects of low cost, good self-healing ability and good cycle stability

Inactive Publication Date: 2019-06-04
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-healing adhesive, its preparation method and its application in lithium-ion batteries. The adhesive has a self-healing function and can be used to solve the volume expansion of alloy electrode materials during use. problems caused by

Method used

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  • Self-repairing adhesive and preparation method and application thereof
  • Self-repairing adhesive and preparation method and application thereof
  • Self-repairing adhesive and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A self-healing adhesive is a UPy-PEG-UPy adhesive, and its specific structural formula is as follows:

[0026]

[0027] In the formula, n is 70.

[0028] A method for preparing a self-healing adhesive, the steps comprising

[0029] Step 1: Mix 2amino-6methyl-4[1H]-pyrimidinone and hexamethylene diisocyanate at a molar ratio of 1:0.8, heat to 45°C, and keep warm for 20 hours to prepare UPy-isocyanate;

[0030] Step 2: Dissolve polyethylene glycol, dibutyltin dilaurate and UPy-isocyanate in chloroform, wherein the molar ratio between polyethylene glycol, dibutyltin dilaurate and UPy-isocyanate is 1:0.01:3, After dissolving, heat it to 55° C., keep it warm for 20 hours, and obtain UPy-PEG-UPy adhesive after refluxing.

Embodiment 2

[0032] A self-healing adhesive is a UPy-PEG-UPy adhesive, and its specific structural formula is as follows:

[0033]

[0034] In the formula, n is 80.

[0035] combine figure 1 Shown, a kind of preparation method of self-healing adhesive, the step comprises

[0036] Step 1: Mix 2amino-6methyl-4[1H]-pyrimidinone and hexamethylene diisocyanate at a molar ratio of 1:1, heat to 50°C, and keep warm for 16 hours to prepare UPy-isocyanate;

[0037] Step 2: Polyethylene glycol, dibutyltin dilaurate and UPy-isocyanate are dissolved in chloroform, wherein the molar ratio between polyethylene glycol, dibutyltin dilaurate and UPy-isocyanate is 1:0.02:4, After dissolving, heat it to 60° C., keep it warm for 16 hours, and obtain the UPy-PEG-UPy adhesive after refluxing.

Embodiment 3

[0039] A self-healing adhesive is a UPy-PEG-UPy adhesive, and its specific structural formula is as follows:

[0040]

[0041] In the formula, n is 100.

[0042] A method for preparing a self-healing adhesive, the steps comprising

[0043] Step 1: Mix 2amino-6methyl-4[1H]-pyrimidinone and hexamethylene diisocyanate at a molar ratio of 1:1.2, heat to 55°C, and keep warm for 10 hours to prepare UPy-isocyanate;

[0044] Step 2: Polyethylene glycol, dibutyltin dilaurate and UPy-isocyanate are dissolved in chloroform, wherein the molar ratio between polyethylene glycol, dibutyltin dilaurate and UPy-isocyanate is 1:0.03:5, After dissolving, heat it to 65° C., keep it warm for 10 hours, and obtain the UPy-PEG-UPy adhesive after refluxing.

[0045] Taking Example 2 as an example, study its structure and performance:

[0046] combine figure 2 Shown, in the infrared absorption spectrum can be seen, 1597 and 1657cm -1 and 1932cm -1 The three infrared absorption peaks at corresp...

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Abstract

The invention discloses a self-repairing adhesive and a preparation method and application thereof. The preparation method comprises the following steps: mixing 2 amino-6 methyl-4[1H]-pyrimidinone andhexamethylene diisocyanate in proportion, heating to 45-55 DEG C, carrying out heat insulation for 10-20 h, preparing UPy-isocyanate; dissolving polyethylene glycol, dibutyltin dilaurate and UPy-isocyanate in chloroform, heating to 55-65 DEG C after dissolution and then carrying out heat insulation for 10-20 h, and refluxing to obtain a UPy-PEG-UPy adhesive. The invention has the following advantages: the adhesive has good self-repairing ability; when an electrode of a lithium ion battery is prepared, the adhesive is used such that microcracks of a binder layer on the surface of active material particles are repaired in each process of delithiation by utilizing the self-repairing property, and then the agglomeration of the nanoparticles is prevented and the service life of the battery isprolonged.

Description

technical field [0001] The invention relates to a self-repairing adhesive, its preparation method and its application in lithium ion batteries, and belongs to the technical field of new energy, especially chemical energy storage. Background technique [0002] Lithium-ion batteries have outstanding advantages such as high monomer voltage, large specific energy, long cycle life, and environmental friendliness, so they quickly occupy an important position in the market of portable electronic consumer goods such as mobile phones and notebook computers, and become an indispensable part of people's daily life. component. The current lithium-ion battery positive electrode materials are mainly composed of lithium cobaltate, lithium iron phosphate, ternary materials, lithium-rich manganese-based materials, etc.; the negative electrode materials are mainly graphite, silicon, lithium titanate, etc. [0003] During the use of lithium-ion batteries, the volume of electrode materials wil...

Claims

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Application Information

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IPC IPC(8): C08G65/333C09J171/02H01M4/62H01M10/0525
CPCY02E60/10
Inventor 杨俊峰张临超谢卓明杨瑞芳张涛王先平方前锋
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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