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Electrochemical power-supply composite membrane and preparation method thereof

A composite membrane, electrochemical technology, applied in the field of electrochemical power supply, can solve the problems of increasing the weight of porous polyolefin membrane, reducing the energy density of the power supply, reducing the specific energy of the power supply, etc., achieving low production cost, low equipment requirements, and easy control of conditions. Effect

Inactive Publication Date: 2014-02-12
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the increase of the weight of the porous polyolefin diaphragm, this type of coating reduces the energy density of the power supply and reduces the specific energy of the power supply, thus limiting the application of the power supply.

Method used

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  • Electrochemical power-supply composite membrane and preparation method thereof
  • Electrochemical power-supply composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A composite separator for electrochemical power supply and its preparation method:

[0036] The composite diaphragm structure of the electrochemical power source is as follows figure 1 As shown, it includes a non-woven membrane layer 1 and an organic-inorganic composite layer 2 combined on both sides of the non-woven membrane layer 2 . Wherein, the non-woven membrane layer 1 is a PET non-woven fabric with a thickness of 30 microns, and the thickness of the organic-inorganic composite layer 2 is 20 microns, and the organic-inorganic composite layer 2 comprises the following formula components in parts by mass:

[0037] 40 parts polytetrafluoroethylene

[0038] 20 parts of hollow alumina with an average particle size of 500nm

[0039] Acetone 40 parts.

[0040] The preparation method of the electrochemical power composite diaphragm:

[0041] Step S11. Preparation of organic-inorganic suspension: according to the formula components of the organic-inorganic composite la...

Embodiment 2

[0045] A composite separator for electrochemical power supply and its preparation method:

[0046] The composite diaphragm structure of the electrochemical power source is the same as the composite diaphragm structure of the electrochemical power source in embodiment 1. Wherein, the non-woven diaphragm layer 1 is a PET non-woven fabric with a thickness of 17 microns, and the thickness of the organic-inorganic composite layer is 5 microns, and the organic-inorganic composite layer comprises the following formula components in parts by mass:

[0047] 50 parts polyvinyl alcohol

[0048] 25 parts of hollow silicon oxide with an average particle size of 200nm

[0049] 1,1,1-Trichloroethane 100 parts.

[0050] The preparation method of the electrochemical power composite diaphragm:

[0051] Step S21. Preparation of organic-inorganic suspension: according to the formulation components of the organic-inorganic composite layer in Example 2, first dissolve polyvinyl alcohol in 1,1,1-...

Embodiment 3

[0055] A composite separator for electrochemical power supply and its preparation method:

[0056] The composite diaphragm structure of the electrochemical power source is the same as the composite diaphragm structure of the electrochemical power source in embodiment 1. Wherein, the non-woven diaphragm layer 1 is a PAN non-woven fabric with a thickness of 27 microns, and the thickness of the organic-inorganic composite layer is 15 microns, and the organic-inorganic composite layer comprises the following formula components in parts by mass:

[0057] 1 part polyurethane

[0058] 90 parts of hollow alumina powder with an average particle size of 10nm

[0059] Carbon disulfide 99 parts.

[0060] The preparation method of the electrochemical power composite diaphragm:

[0061] Step S31. Preparation of organic-inorganic suspension: according to the formulation components of the organic-inorganic composite layer in Example 3, the polyurethane is first dissolved in carbon disulfid...

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Abstract

The invention provides an electrochemical power-supply composite membrane and a preparation method thereof. The electrochemical power-supply composite membrane comprises a non-woven fabrics membrane layer and an organic-inorganic composite layer combining with the surface of the non-woven fabrics membrane layer; the organic-inorganic composite layer comprises an organic binder, a hollow inorganic powder and an organic solvent formula component, wherein the organic binder accounts for 1%-50% by mass of the sum of the organic binder and the organic solvent, and the hollow inorganic powder accounts for 1%-50% by mass of the sum of the organic binder, the hollow inorganic powder and the organic solvent. The electrochemical power-supply composite membrane is high in membrane rupture temperature and strength, good in heat dissipation performance and reduced in weight, and thus the safety performance and the cycle service life of an electrochemical power supply are prolonged, and the energy density of the electrochemical power supply is improved.

Description

technical field [0001] The invention belongs to the technical field of electrochemical power sources, and in particular relates to a composite diaphragm of electrochemical power sources and a preparation method thereof. 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 safety and reliability to replace the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M50/403H01M50/417H01M50/446H01M50/449H01M50/489
CPCH01M50/411H01M50/44H01M50/403Y02E60/10
Inventor 周明杰袁贤阳王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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