Electrochemical power source membrane, preparation method of electrochemical power source membrane and electrochemical battery or capacitor

An electrochemical and diaphragm technology, applied in the field of electrochemistry, can solve the problems of poor electrolyte wetting performance, uneven distribution, low heat resistance temperature, etc., and achieve the effects of simple and effective preparation method, improved safety, and high film breaking temperature.

Active Publication Date: 2014-08-06
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of separator not only has poor wettability to the electrolyte, but also has a low heat resistance temperature.
Non-woven separators are wide

Method used

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  • Electrochemical power source membrane, preparation method of electrochemical power source membrane and electrochemical battery or capacitor

Examples

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Example Embodiment

[0037] Example 1

[0038] A preparation method of an electrochemical power supply membrane, comprising the following steps:

[0039] (1) Dissolving polyvinyl alcohol in deionized water to form an emulsion, in the emulsion, the mass percentage of polyvinyl alcohol is 1%;

[0040] (2) To the above-mentioned emulsion, add ethyl orthosilicate with a purity of 99% and a mass of 5 times that of polyvinyl alcohol, mix well, and then drop into the obtained emulsion containing ethyl orthosilicate with a mass concentration of 20%. The ammoniacal liquor was stirred for 4 hours to obtain the mixed liquid; wherein, the ammoniacal liquor quality dropped in and the mass ratio of ethyl orthosilicate were 1:4;

[0041] (3) Immerse the PET non-woven fabric with a thickness of 10 μm in the mixed liquid for 0.5 hours, take it out and place it in an ammonia gas atmosphere for 1 hour, rinse it with deionized water until the pH is neutral, and finally put it at 50 ° C After drying for 24 hours, th...

Example Embodiment

[0043] Example 2

[0044] A preparation method of an electrochemical power supply membrane, comprising the following steps:

[0045] (1) Dissolving polytetrafluoroethylene in ethanol to form an emulsion, in the emulsion, the mass percentage of polytetrafluoroethylene is 5%;

[0046] (2) To the above-mentioned emulsion, add ethyl orthosilicate with a purity of 99.9% and a mass of 10 times the quality of polytetrafluoroethylene, mix well, and then drop into the obtained emulsion containing ethyl orthosilicate with a mass concentration of 25%. % ammoniacal liquor, stirred 8 hours, obtains mixed liquid; Wherein, the ammoniacal liquor quality that drips in and the mass ratio of tetraethyl orthosilicate are 1:3;

[0047](3) Immerse the PET non-woven fabric with a thickness of 20 μm in the mixed liquid for 1 hour, take it out and place it in an ammonia gas atmosphere for 1 hour, rinse it with deionized water after taking it out until the pH is neutral, and finally put it at 60 ° C ...

Example Embodiment

[0050] Example 3

[0051] A preparation method of an electrochemical power supply membrane, comprising the following steps:

[0052] (1) Dissolving polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) in acetone to form an emulsion, the mass percentage of PVDF-HFP in the emulsion is 6%;

[0053] (2) Add ethyl orthosilicate with a purity of 99% and a mass of 20 times that of PVDF-HFP to the above-mentioned emulsion, mix well, and then drop into the obtained emulsion containing ethyl orthosilicate with a mass concentration of 30%. The ammoniacal liquor was stirred for 10 hours to obtain the mixed liquid; wherein, the mass ratio of the ammoniacal liquor dropped in and the mass ratio of ethyl orthosilicate was 1:2.5;

[0054] (3) Immerse the PAN non-woven fabric with a thickness of 30 μm in the mixed liquid for 1.5 hours, take it out and place it in an ammonia gas atmosphere for 1 hour, rinse it with deionized water until the pH is neutral, and finally place it at 70°C After d...

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Abstract

The invention provides an electrochemical power source membrane and a preparation method of the electrochemical power source membrane. The preparation method includes the steps of dissolving binders in a solvent to form emulsions, wherein the mass percentage composition of the binders in the emulsions ranges from 1% to 10%; adding tetraethoxysilane with the mass 5-30 times that of the binders in the emulsions, evenly mixing the tetraethoxysilane and the emulsions, then dropping ammonium hydroxide with the mass concentration ranging from 20% to 35% in the emulsions, conducting stirring for 4-12 hours, and obtaining mixed liquid, wherein the ratio of the mass of the dropped ammonium hydroxide to the mass of the tetraethoxysilane ranges from 1:1.5 to 1:4; immersing a non-woven fabric membrane into the mixed liquid for 0.5-3 hours, taking out the non-woven fabric membrane, drying the non-woven fabric membrane, and then obtaining the non-woven fabric electrochemical power source membrane with the surface wrapped by silicon dioxide. The electrochemical power source membrane is appropriate in hole diameter, good in heat-resistant quality and high in safety, and the safety of an electrochemical battery or capacitor can be effectively and accordingly improved. The invention further provides the electrochemical battery or capacitor with the electrochemical power source membrane.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an electrochemical power separator and a preparation method thereof. The invention also relates to an electrochemical cell or capacitor. Background technique [0002] With the development of human productivity, more and more cars are driving in the streets and alleys of cities and villages. The popularity of automobiles has brought great convenience to people's lives. However, the accompanying problems are becoming more and more serious. The consumption of non-renewable energy such as petroleum continues to accelerate, and the impact of vehicle exhaust emissions on the environment continues to expand. At present, in order to solve these problems, people propose to develop electric vehicles in order to replace traditional vehicles. The key lies in whether there is a power battery with sufficient energy density, power density, long enough cycle life, and safe and reliable power ...

Claims

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Application Information

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IPC IPC(8): H01G11/84H01G11/52H01M2/16H01M50/417H01M50/431
CPCY02E60/13
Inventor 周明杰吴凤
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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