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Organic/inorganic composite polymer diaphragm and preparation method thereof

An inorganic composite and polymer technology, applied in electrical components, circuits, battery pack parts, etc., can solve the problems of low swelling rate and high swelling rate, and achieve the advantages of reducing swelling rate, improving electrical conductivity and increasing liquid absorption. Effect

Inactive Publication Date: 2016-03-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic / inorganic composite polymer diaphragm provided by the present invention has the characteristics of high liquid absorption and low swelling rate, which not only solves the problem that the high liquid absorption rate of the gel-type polymer diaphragm in the lithium-ion battery will lead to high swelling rate. problems, and can further improve the conductivity of lithium ions

Method used

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  • Organic/inorganic composite polymer diaphragm and preparation method thereof
  • Organic/inorganic composite polymer diaphragm and preparation method thereof
  • Organic/inorganic composite polymer diaphragm and preparation method thereof

Examples

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Embodiment 1

[0063] This embodiment relates to an organic / inorganic composite polymer membrane, including a polymer matrix and hollow mesoporous silica microspheres, the hollow mesoporous silica microspheres are dispersed in the polymer matrix, and the hollow mesoporous silica microspheres Balls (the average outer diameter of hollow mesoporous silica microspheres is 100-2000nm, the average wall thickness is 0.1-0.4 times the outer diameter, and the wall part has an ordered mesoporous structure along the direction perpendicular to the spherical surface) and poly The mass ratio of vinyl fluoride is 1:100; the average pore diameter of the mesopores is 2-10nm, and the mesopores run through the entire wall of the hollow mesoporous silica microspheres, so that the absorbed liquid substances can enter the cavity part of the microspheres.

[0064] This embodiment also relates to the preparation method of the aforementioned organic / inorganic composite polymer diaphragm, comprising the following step...

Embodiment 2

[0070] This embodiment relates to an organic / inorganic composite polymer membrane, including a polymer matrix and hollow mesoporous silica microspheres, the hollow mesoporous silica microspheres are dispersed in the polymer matrix, and the hollow mesoporous silica microspheres Balls (the average outer diameter of hollow mesoporous silica microspheres is 100-2000nm, the average wall thickness is 0.1-0.4 times the outer diameter, and the wall part has an ordered mesoporous structure along the direction perpendicular to the spherical surface) and polyoxidized The mass ratio of ethylene is 1:100; the average pore diameter of the mesopores is 2-10nm, and the mesopores run through the entire wall of the hollow mesoporous silica microspheres, so that the absorbed liquid substances can enter the cavity part of the microspheres.

[0071] This embodiment also relates to the preparation method of the aforementioned organic / inorganic composite polymer diaphragm, comprising the following st...

Embodiment 3

[0077] This embodiment relates to an organic / inorganic composite polymer membrane, including a polymer matrix and hollow mesoporous silica microspheres, the hollow mesoporous silica microspheres are dispersed in the polymer matrix, and the hollow mesoporous silica microspheres Balls (the average outer diameter of hollow mesoporous silica microspheres is 100-2000nm, the average wall thickness is 0.1-0.4 times the outer diameter, and the wall part has an ordered mesoporous structure along the direction perpendicular to the spherical surface) and polypropylene The mass ratio of nitrile is 1:50; the average pore diameter of the mesopores is 2-10nm, and the mesopores run through the entire wall of the hollow mesoporous silica microspheres, so that the absorbed liquid substances can enter the cavity part of the microspheres.

[0078] This embodiment also relates to a method for preparing the aforementioned organic / inorganic composite polymer membrane, comprising the following steps: ...

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Abstract

The invention discloses an organic / inorganic composite polymer diaphragm and a preparation method thereof. The diagram comprises a polymer matrix and hollow mesoporous silica microspheres dispersed in the polymer matrix. The preparation method comprises the following steps: dissolving a polymer in a solvent to prepare a polymer solution, adding the hollow mesoporous silica microspheres to the polymer solution and dispersing the solution through stirring to obtain a mixed solution; pouring the mixed solution on a flat base plate; and performing drying. According to the invention, hollow mesoporous silica is used as an additive to introduce void volume in the polymer matrix, thereby further improving solution absorption performance. The organic / inorganic composite polymer diaphragm has characteristics of good solution absorption and a low swelling ratio. The technical problem that a gel-type polymer diaphragm has a high swelling rate caused by high a solution absorption rate in a lithium-ion battery is solved, thereby further improving conductivity of lithium ions.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to an organic / inorganic composite polymer diaphragm and a preparation method thereof. Background technique [0002] Energy crisis and environmental pollution are the major concerns of human beings nowadays. With the vigorous development of the electronic information industry, the use of electronic devices such as smart phones and notebook computers is becoming more and more popular, and gradually develops towards miniaturization and light weight. Therefore, the development of new chemical power sources with high specific energy and long cycle life has become a inevitable trend of development. Secondary batteries such as nickel-cadmium batteries generally contain heavy metals, so their development is limited today as more and more attention is paid to environmental issues. Finding new rechargeable batteries that can replace traditional lead-acid batteries ...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M2/18H01M50/403H01M50/443H01M50/446
CPCY02E60/10
Inventor 蒋峰景余晴春章俊良
Owner SHANGHAI JIAO TONG UNIV
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