Non-woven paper ion battery diaphragm and preparation method thereof

A technology of ion batteries and non-woven paper, which is applied in the direction of secondary batteries, battery pack components, circuits, etc., and can solve the problems of inability to apply ion batteries, large aperture and thickness of non-woven paper, etc.

Pending Publication Date: 2020-01-03
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides a non-woven paper ion battery separator and a preparation method thereof, which can effectively solve the technical defects that the existing non-woven paper has too large aperture and thickness and cannot be applied to ion batteries.

Method used

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  • Non-woven paper ion battery diaphragm and preparation method thereof
  • Non-woven paper ion battery diaphragm and preparation method thereof
  • Non-woven paper ion battery diaphragm and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The application provides the preparation method of the first non-woven paper ion battery diaphragm, and the specific steps are as follows:

[0041] At first the barium titanate 1g that particle diameter is 50nm joins in the acetone (100ml) and disperses uniformly, behind 1,4-butanediol and hexachlorocyclotriphosphazene (1,4-butanediol and hexachlorocyclotriphosphazene The molar ratio is 3:2) were added to acetone containing barium titanate, and reacted, the reaction conditions were 60 ° C stirring reaction for 4 hours, centrifuged to wash off the solvent and 80 ° C blast drying for 2 hours to obtain modified barium titanate powder ; Add modified barium titanate powder, sodium tripolyphosphate (0.1g), sodium lauryl sulfate (0.1g) to the DMSO solution of polyvinylidene fluoride PVDF (PVDF is 1g, DMSO is 50ml) and compounded Slurry and mix uniformly to obtain coating slurry.

[0042] The obtained coating slurry is coated on the surface of the non-woven paper, dried and th...

Embodiment 2

[0045] The application provides the second preparation method of non-woven paper ion battery separator, the specific steps are as follows:

[0046] At first the barium titanate 1g that particle diameter is 50nm joins in the acetone (100ml) and disperses uniformly, behind 1,4-butanediol and hexachlorocyclotriphosphazene (1,4-butanediol and hexachlorocyclotriphosphazene The molar ratio is 3:2) were added to acetone containing barium titanate, and reacted, the reaction conditions were 60 ° C stirring reaction for 4 hours, centrifuged to wash off the solvent and 80 ° C blast drying for 2 hours to obtain modified barium titanate powder ; Add modified barium titanate powder, sodium tripolyphosphate (0.1g), sodium lauryl sulfate (0.1g) to the DMSO solution of polyvinylidene fluoride PVDF (PVDF is 1g, DMSO is 50ml) and compounded Slurry and mix uniformly to obtain coating slurry.

[0047] The obtained coating slurry is coated on the surface of the non-woven paper, dried and then hot-...

Embodiment 3

[0049] The application provides the third preparation method of the non-woven paper ion battery separator, the specific steps are as follows:

[0050] At first the barium titanate 1g that particle diameter is 50nm joins in the acetone (100ml) and disperses uniformly, behind 1,4-butanediol and hexachlorocyclotriphosphazene (1,4-butanediol and hexachlorocyclotriphosphazene The molar ratio is 3:2) were added to acetone containing barium titanate, and reacted, the reaction conditions were 60 ° C stirring reaction for 4 hours, centrifuged to wash off the solvent and 80 ° C blast drying for 2 hours to obtain modified barium titanate powder ; Add modified barium titanate powder, sodium tripolyphosphate (0.1g), sodium lauryl sulfate (0.1g) to the DMSO solution of polyvinylidene fluoride PVDF (PVDF is 1g, DMSO is 50ml) and compounded Slurry and mix uniformly to obtain coating slurry.

[0051] The obtained coating slurry is coated on the surface of the non-woven paper, dried and then h...

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Abstract

The invention belongs to the technical field of ion batteries, and particularly relates to a non-woven paper ion battery diaphragm and a preparation method thereof. The preparation method for the non-woven paper ion battery diaphragm comprises the following steps: 1, modified barium titanate powder is mixed with an organic solution to obtain coating slurry; 2, the surface of the non-woven paper iscoated with the coating slurry, hot pressing is carried out to obtain a non-woven paper ion battery diaphragm, barium titanate is modified, the flame retardant effect of barium titanate is improved.Under the action of the organic solution, the compatibility of the modified barium titanate powder is improved; the particle size of the modified barium titanate powder can be a single particle size and can also be different particle sizes; and the coating slurry is embedded into micropores of the non-woven paper through hot-pressing treatment, so that the pore diameter of the micropores of the non-woven paper is reduced, the pore diameter and the thickness of the non-woven paper are controlled, the problem of lithium dendrites is solved, and the technical defects that the existing non-woven paper is overlarge in pore diameter and thickness and cannot be applied to an ion battery are overcome.

Description

technical field [0001] The invention belongs to the technical field of ion batteries, and in particular relates to a non-woven paper ion battery diaphragm and a preparation method thereof. Background technique [0002] An ion battery consists of four parts: positive electrode, electrolyte, separator, and negative electrode. The basic function of the separator is to isolate the positive and negative electrodes and provide a channel for the transmission of lithium ions. Common separators on the market are PP, PE or PP / PE / PP three-layer film, etc., but PP and PE are polymer materials, the melting point of the former is 167°C, and the latter is 135°C. Under high temperature conditions, the two are easy to rupture the membrane. Moreover, the lithium dendrites growing on the negative electrode may also pierce the polyolefin separator, causing the positive and negative electrodes of the battery to contact and cause an explosion; moreover, PP and PE are non-polar materials that hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/0525
CPCH01M10/0525H01M50/403H01M50/446Y02E60/10
Inventor 田子钦崔泽君陈加强赵艳袁子丹黄恒辉谢嘉宜徐睿杰雷彩红
Owner GUANGDONG UNIV OF TECH
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