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Electrochemical power-supply composite membrane and preparation method thereof

A composite diaphragm and electrochemical technology, applied in the field of electrochemical power supply, can solve the problems of increasing the weight of porous polyolefin diaphragm, reducing the energy density of power supply, reducing the specific energy of 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
  • Electrochemical power-supply composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A composite separator for electrochemical power supply and its preparation method:

[0038] The composite diaphragm structure of the electrochemical power source is as follows figure 1 As shown, it includes a polyolefin membrane layer 1 and an organic-inorganic composite layer 2 combining both sides of the polyolefin membrane layer 1 . Wherein, the polyolefin diaphragm layer 1 is a polypropylene diaphragm with a thickness of 21 microns, and the thickness of the organic-inorganic composite layer 2 is 5 microns, and the organic-inorganic composite layer 2 comprises the following formula components in parts by mass:

[0039]

[0040] Among them, the average particle diameter of the hollow alumina is 500 nm, the average length of the glass fiber is 1 μm, and the diameter is 4 nm.

[0041] The preparation method of the electrochemical power composite diaphragm:

[0042] Step S11. Preparation of organic-inorganic suspension: according to the formulation components of the...

Embodiment 2

[0046] A composite separator for electrochemical power supply and its preparation method:

[0047] 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 polyolefin diaphragm layer 1 is a polypropylene diaphragm with a thickness of 30 microns, and the thickness of the organic-inorganic composite layer is 10 microns, and the organic-inorganic composite layer comprises the following formula components in parts by mass:

[0048]

[0049] Wherein, the average particle size of the hollow silicon oxide is 200 nm, the average length of the glass fiber is 1 μm, and the diameter is 20 nm.

[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, polyvinyl alcohol is first di...

Embodiment 3

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

[0056] The electrochemical power source composite membrane structure is the same as the electrochemical power source composite membrane structure in Example 1, wherein the polyolefin membrane layer 1 is a polyethylene membrane with a thickness of 28 microns, and the thickness of the organic-inorganic composite layer is 8 microns. -The inorganic composite layer comprises the following formula components in parts by mass:

[0057]

[0058] Wherein, the average particle diameter of the hollow silica is 200nm, the average length of the glass fiber is 100nm, and the diameter is 50nm.

[0059] The preparation method of the electrochemical power composite diaphragm:

[0060] Step S31. Preparation of organic-inorganic suspension: according to the formulation components of the organic-inorganic composite layer in Example 3, first dissolve the modified styrene-butadiene rubber in carbon tetra...

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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 polyolefin membrane layer and an organic-inorganic composite layer combining with the surface of the polyolefin membrane layer; the organic-inorganic composite layer comprises an organic binder, a hollow inorganic powder, inorganic nanometer fiber 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 and the inorganic nanometer fiber respectively accounts for 0.5%-25% by mass of the sum of the organic binder, the hollow inorganic powder, the inorganic nanometer fiber and the organic solvent. The electrochemical power-supply composite membrane is effectively improved in membrane rupture temperature, heat dissipation performance and strength, 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. The preparation method of the composite membrane is simple in technology and high in production efficiency, and is suitable for industrial production.

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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IPC IPC(8): H01M2/16H01M50/403H01M50/417H01M50/446H01M50/449H01M50/489
CPCH01M50/431H01M50/44H01M50/403H01M50/411Y02E60/10
Inventor 周明杰袁贤阳王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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