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A kind of method and its application of polymer protection metal secondary battery negative electrode

A technology for secondary batteries and metal anodes, applied in the field of electrochemical power sources, can solve problems such as complex processes, and achieve the effects of simple methods, free growth inhibition, and excellent performance.

Active Publication Date: 2020-04-24
BEIJING IAMETAL NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to introduce an additional glass fiber layer, and the process is relatively complicated

Method used

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  • A kind of method and its application of polymer protection metal secondary battery negative electrode
  • A kind of method and its application of polymer protection metal secondary battery negative electrode
  • A kind of method and its application of polymer protection metal secondary battery negative electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of polymer-protected metal lithium anode and polymer lithium battery

[0038] Step 1) Preparation of a polymer-protected metallic lithium negative electrode: In a high-purity argon atmosphere, drop 40 μL of a precursor solution on the surface of a lithium sheet, wherein the polymerized monomer is tetrahydrofuran, and the volume fraction is 80% of the total volume of the solution , the solvent is a mixed solvent of EC / DEC / DMC with a volume fraction of 20% (volume ratio 1:1:1), and the concentration of lithium salt is 1mol L -1 Lithium hexafluorophosphate, the reaction temperature is 25°C, and standing for 20 hours, the lithium negative electrode protected by the polymer interface layer of the present invention can be obtained. SEM observed that the surface of the polymer was smooth, and the thickness of the section was about 15μ. The electrical conductivity of the obtained polymer was measured, and the test results are listed in Table 1. Figure 2a The ...

Embodiment 2

[0048] Other conditions are the same as in Example 1, except that the volume fraction of the polymerized monomer in step 1) is 75%, and the volume fraction of the solvent is 25%. All test results are listed in Table 1.

Embodiment 3

[0050] Other conditions are the same as in Example 1, except that the volume fraction of the polymerized monomer in step 1) is 60%, and the volume fraction of the solvent is 40%. All test results are listed in Table 1.

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Abstract

The present invention discloses a method for protecting a negative electrode of a metal secondary battery by using a polymer, allowing the protected negative electrode to be applied to a lithium metal secondary battery and a sodium metal secondary battery. The metal secondary battery protection method described in this patent is forming a polymer interface protective layer by ring-opening polymerization of a cyclic organic substance on the surface of a lithium metal or sodium metal negative electrode. The protection method has the advantage of being a simple technology and using easily available raw materials, and has high practical and commercialization potential. The application of the protected metal negative electrode to metal secondary batteries can significantly alleviate the common problem currently of dendritic crystallization in metal negative electrodes and can improve the cyclic performance and safety of batteries.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and relates to a method for protecting the negative electrode of a metal secondary battery, a novel polymer metal secondary battery using the negative electrode protected by the method and its application in energy storage devices. Background technique [0002] With the growth of population, the gradual aggravation of environmental and climate problems and the depletion of resource reserves, the traditional energy structure based on coal, oil and natural gas has been severely challenged, and people have gradually turned to new types of energy dominated by solar energy, wind energy and water energy. Energy system to get rid of dependence on traditional energy. However, this type of energy itself is intermittent, and it is urgent to develop new energy storage devices to realize large-scale real-time storage and release of energy to maintain uninterrupted energy supply. As a typical rep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M4/134H01M4/131H01M4/136H01M10/0525H01M10/054C08G65/20C08G2/18C08G65/06C08G65/16C08G2/22
CPCC08G2/18C08G2/22C08G65/06C08G65/16C08G65/20H01M4/131H01M4/134H01M4/136H01M10/0525H01M10/054H01M10/4235H01M10/42Y02E60/10
Inventor 郭玉国王文鹏殷雅侠李林
Owner BEIJING IAMETAL NEW ENERGY TECH CO LTD
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