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Electrochemical power source diaphragm and preparation method thereof, and electrochemical cell 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., to meet the packaging and cycle performance, overcome uneven distribution, and high film breaking temperature. Effect

Inactive Publication Date: 2014-07-02
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

[0003] At present, the separator commonly used in lithium-ion batteries is porous polyolefin separator, but this separator not only has poor wettability to the electrolyte, but also has a low heat resistance temperature.
Non-woven separators are widely used due to their excellent heat resistance and good mechanical strength, but they have the disadvantages of excessively large pores and uneven distribution

Method used

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  • Electrochemical power source diaphragm and preparation method thereof, and electrochemical cell or capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A preparation method of an electrochemical power separator, comprising the following steps:

[0029] (1) Anhydrous aluminum chloride is dissolved in deionized water to prepare an aluminum chloride solution with a mass concentration of 20%;

[0030] (2) After immersing the PET non-woven fabric with a thickness of 15 μm in the aluminum chloride solution in (1) for 1 hour, take it out to obtain the PET non-woven fabric with the aluminum chloride solution attached to the surface;

[0031] (3) Arrange the above-mentioned PET nonwoven with aluminum chloride solution in an ammonia environment for 1 hour, take it out after the reaction of aluminum chloride is complete, wash it with deionized water until the pH test is neutral, and then place it at 80 ℃ drying oven for 24 hours and then take it out to obtain a PET non-woven electrochemical power separator coated with aluminum hydroxide.

[0032] The electrochemical power supply separator prepared in this embodiment was measured...

Embodiment 2

[0034] A preparation method of an electrochemical power separator, comprising the following steps:

[0035] (1) Anhydrous aluminum chloride is dissolved in ethanol to prepare an aluminum chloride ethanol solution with a mass concentration of 25%;

[0036] (2) Immerse the PAN non-woven fabric with a thickness of 20 μm in the aluminum chloride ethanol solution in (1) for 2 hours, take it out, and obtain the PAN non-woven fabric with the aluminum chloride solution attached to the surface;

[0037] (3) Arrange the above-mentioned nonwoven with aluminum chloride solution in an ammonia atmosphere for 2 hours, take it out after the aluminum chloride has completely reacted, wash it with deionized water until the pH test is neutral, and then place it at 100°C Take it out after drying in a drying oven for 16 hours to obtain a non-woven electrochemical power separator coated with aluminum hydroxide.

[0038] The electrochemical power supply separator prepared in this embodiment was meas...

Embodiment 3

[0040] A preparation method of an electrochemical power separator, comprising the following steps:

[0041] (1) Anhydrous aluminum chloride is dissolved in ether to prepare an aluminum chloride ether solution with a mass concentration of 50%;

[0042] (2) Immerse the PAN non-woven fabric with a thickness of 10 μm in the aluminum chloride solution in (1) for 2 hours, take it out, and obtain the PAN non-woven fabric with the aluminum chloride solution attached to the surface;

[0043] (3) Arrange the above-mentioned PAN non-woven with aluminum chloride solution in an ammonia environment for 2 hours, take it out after the reaction of aluminum chloride is complete, wash it with deionized water until the pH test is neutral, and then place it at 70 ℃ drying oven for 20 hours and then take it out to obtain a PAN non-woven electrochemical power separator coated with aluminum hydroxide.

[0044] The electrochemical power supply separator prepared in this embodiment was measured for po...

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Abstract

The invention provides an electrochemical power source diaphragm and a preparation method thereof. The method comprises the following steps: dissolving anhydrous aluminum chloride in a solvent to prepare a 10-60 wt% aluminum chloride solution; immersing a nonwoven fabric into the aluminum chloride solution for 0.5-3 hours, and taking out to obtain the nonwoven fabric of which the surface is coated with the aluminum chloride solution; and putting the nonwoven fabric coated with the aluminum chloride solution in an ammonia gas environment for 1-2 hours, completely reacting the aluminum chloride, taking out, washing with deionized water to a neutral state, and drying to obtain the nonwoven fabric electrochemical power source diaphragm coated with aluminum hydroxide. The electrochemical power source diaphragm has the advantages of proper pore size, uniform pore size distribution, favorable wettability for electrolytes, favorable heat resistance and high safety, thereby effectively enhancing the cycle performance and safety performance of the electrochemical cell or capacitor. The invention also provides an electrochemical cell or capacitor using the diaphragm.

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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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/0525H01M50/417H01M50/431H01M50/491
CPCY02E60/122H01M50/403H01M50/449Y02E60/10
Inventor 周明杰钟玲珑王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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