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Electrochemical power supply separation membrane and preparation method thereof, electrochemical battery or capacitor

An electrochemical and diaphragm technology, applied in the field of electrochemistry, can solve the problems of low heat resistance temperature and poor electrolyte wettability, achieve good heat resistance, simple and effective preparation method, and improve safety performance

Inactive 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

[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.

Method used

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  • Electrochemical power supply separation membrane and preparation method thereof, electrochemical battery or capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of electrochemical power supply diaphragm includes the following steps:

[0032] (1) Dissolve anhydrous aluminum chloride in deionized water to prepare an aluminum chloride solution with a mass concentration of 10%;

[0033] (2) After immersing a polypropylene diaphragm with a thickness of 10 μm in the aluminum chloride solution in (1) for 0.5 hours, take it out to obtain a polypropylene diaphragm with aluminum chloride solution attached to the surface;

[0034] (3) Place the above-mentioned polypropylene diaphragm with aluminum chloride solution in an ammonia atmosphere for 1 hour. After the aluminum chloride reaction is complete, take it out, wash with deionized water until the pH is neutral, and then place it at 80°C After being dried in the drying box for 24 hours, take it out to obtain an electrochemical power supply diaphragm. The diaphragm is a polypropylene diaphragm with an aluminum hydroxide coating layer on the surface. Among them, the thicknes...

Embodiment 2

[0037] A preparation method of electrochemical power supply diaphragm includes the following steps:

[0038] (1) Dissolve anhydrous aluminum chloride in ethanol to prepare an ethanol solution of aluminum chloride with a mass concentration of 20%;

[0039] (2) After immersing a polyethylene diaphragm with a thickness of 15 μm in the aluminum chloride ethanol solution in (1) for 1 hour, take it out to obtain a polyethylene diaphragm with aluminum chloride solution attached to the surface;

[0040] (3) Place the above-mentioned polyethylene membrane with aluminum chloride solution in an ammonia atmosphere for 2 hours. After the aluminum chloride reaction is complete, take it out, wash with deionized water until the pH is neutral, and then place it at 100°C After being dried for 16 hours in the drying box, the electrochemical power supply diaphragm is obtained, and the diaphragm is a polyethylene diaphragm with an aluminum hydroxide coating layer on the surface. Among them, the thicknes...

Embodiment 3

[0043] A preparation method of electrochemical power supply diaphragm includes the following steps:

[0044] (1) Dissolve anhydrous aluminum chloride in ether to prepare a 30% solution of aluminum chloride in ether;

[0045] (2) The polypropylene-polyethylene-polypropylene (PP-PE-PP) three-layer diaphragm with a thickness of 20μm is immersed in the aluminum chloride solution in (1) for 1.5 hours, and then taken out, and aluminum chloride is attached to the surface Solution PP-PE-PP three-layer diaphragm;

[0046] (3) Place the above-mentioned PP-PE-PP three-layer diaphragm with aluminum chloride solution in an ammonia atmosphere for 2 hours. After the aluminum chloride reaction is complete, take it out and wash with deionized water until the pH is neutral. Then, it was placed in a drying box at 70° C. for drying for 20 hours and then taken out to obtain an electrochemical power supply diaphragm. The diaphragm was a PP-PE-PP three-layer diaphragm with an aluminum hydroxide coating la...

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Abstract

The present invention provides an electrochemical power supply separation membrane, which comprises a polyolefin separation membrane and a coating layer coated on the surface of the polyolefin separation membrane, wherein the material of the coating layer is aluminum hydroxide, the thickness of the polyolefin separation membrane is 10-50 mum, and the thickness of the coating layer is 3-8 mum. According to the present invention, the electrochemical power supply separation membrane has characteristics of suitable pore size, good heat resistance and high safety so as to effectively improve cycling performance and safety performance of the electrochemical battery or capacitor. The present invention accordingly provides a preparation method for the electrochemical power supply separation membrane. In addition, the present invention further provides an electrochemical battery or capacitor using the electrochemical separation membrane.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01G11/52H01G11/84H01M50/403H01M50/449
CPCH01M10/0525H01G11/52H01M50/431H01M50/403H01M50/449H01M50/411Y02E60/13Y02E60/10
Inventor 周明杰吴凤
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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