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Lithium ion battery with polymethyl methacrylate micropore diaphragm

A technology of polymethyl methacrylate and lithium-ion batteries, which is applied to battery components, circuits, electrical components, etc., can solve the problems of using a large amount of solvents, prone to finger-shaped holes, and unfavorable ion passage, so as to avoid structural The effect of collapse

Inactive Publication Date: 2013-11-20
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the immersion precipitation method is that it is difficult to obtain a membrane with a symmetrical structure, and finger-shaped holes are prone to appear, which is not conducive to the contact between the separator and the electrode.
In recent years, the thermally induced phase separation method has been studied more. Its advantages are narrow pore size distribution, symmetrical structure, and no finger-like pores. The preparation process needs to use a large amount of solvent, which is easy to cause environmental pollution and other problems

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0017] The technical solutions of the present invention and the effects achieved are further described below through specific examples, but the following examples do not constitute a limitation to the present invention.

[0018] A lithium ion battery with a polymethyl methacrylate microporous diaphragm, comprising a negative pole, a positive pole, an electrolyte, and a diaphragm, wherein the diaphragm is prepared by the following method:

[0019] (1) Place the polymethyl methacrylate in a drying oven and dry it at a constant temperature for 10 to 15 hours to remove the moisture therein, and seal the dried polymethyl methacrylate for subsequent use;

[0020] (2) Accurately weigh the polymethyl methacrylate particles with an electronic balance, and add an organic solvent for dissolving polymethyl methacrylate to make a casting solution whose mass concentration is 25%;

[0021] (3) After the polymethyl methacrylate is completely dissolved and stirred evenly, seal and block the li...

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Abstract

The invention discloses a lithium ion battery with a polymethyl methacrylate micropore diaphragm. The micropore diaphragm is prepared by a supercritical fluid phase separation method.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a lithium ion battery with a polymethyl methacrylate microporous diaphragm. Background technique [0002] Lithium-ion batteries have been developed rapidly due to their excellent electrical properties such as high energy density, long cycle life and high voltage. Has been widely used in mobile phones, portable computers, cameras, video cameras and other electronic products. Lithium-ion batteries are divided into liquid lithium-ion batteries and solid-state lithium-ion batteries. Solid-state lithium-ion batteries are generally called polymer lithium-ion batteries or plastic lithium-ion batteries. The electrolyte of the ion battery is not a free electrolyte, but a gel electrolyte or a solid electrolyte. Polymer electrolytes not only have high ionic conductivity, long cycle life, minimal pollution and good processing performance, but also have better safety and flexibility in shape design....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L33/12H01M2/16H01M50/403H01M50/42
CPCY02E60/12Y02P20/54
Inventor 吴浩
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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