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Composite flexible electrode material as well as preparation method and application thereof

A technology of electrode materials and flexible electrodes, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient utilization and development of flexible electrodes, and achieve stable cycle performance, excellent rate performance, and high specific capacity.

Active Publication Date: 2014-10-15
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current research mainly focuses on the synthesis of new structural materials, the improvement of capacity, the improvement of cycle performance and the optimization of electrochemical performance, but does not make full use of the intrinsic flexibility of polyimide, and has not developed flexible electrodes. work

Method used

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  • Composite flexible electrode material as well as preparation method and application thereof
  • Composite flexible electrode material as well as preparation method and application thereof
  • Composite flexible electrode material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Weigh 50 mg of carbon nanotubes (Chengdu Institute of Organic Chemistry) and 100 mg of sodium deoxycholate (Sinopharm Chemical Reagent Company) into 100 mL of deionized water, and ultrasonicate at 200 W for 2 h.

[0077] The carbon nanotube dispersion was suction-filtered, washed with deionized water to remove the surfactant, the carbon nanotube membrane was peeled off from the filter membrane, and dried overnight in a vacuum oven.

[0078] The carbon nanotube film is fixed in the self-made reaction container, add 33g4-chlorophenol (Bai Lingwei Technology Co., Ltd.) as solvent, add polymerized monomer pyromellitic dianhydride (Sinopharm Group Chemical Reagent Company) and ethylenediamine (Bai Lingwei Technology Co., Ltd.) to obtain a solution with a concentration of 0.2mmol / g, reflux for 9h, wash the membrane with acetone, dry it, heat-treat it at 300°C for 8h under an inert gas, wash the membrane with acetone, and dry it under vacuum overnight at 60°C to obtain Polyimi...

Embodiment 2

[0081] The polyimide / carbon nanotube composite electrode was prepared according to the method of Example 1, except that the amine was replaced by phenylenediamine to prepare an in-situ polymerized polyimide / carbon nanotube flexible composite film.

Embodiment 3

[0083] The polyimide / graphene composite electrode was prepared according to the method of Example 1, except that carbon nanotubes were replaced by graphene.

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Abstract

The invention discloses a polyimide-based composite electrode material and a preparation method thereof. The electrode material comprises polyimide and a carbon-based material, wherein the polyimide is distributed in the carbon-based material in a nanosheet or nano-particle form. The provided material is used for preparing a lithium ion battery whose positive electrode has high specific capacity, and the material has good stability and flexibility and is suitable for manufacturing a flexible electrode; and the method is simple and suitable for preparing electrode materials on a large scale.

Description

technical field [0001] The invention belongs to the field of electrode materials, and in particular relates to a polyimide / carbon nanotube composite flexible electrode and a preparation method thereof, as well as the application of the electrode prepared by the method to a lithium ion battery. Background technique [0002] Lithium-ion battery is a secondary battery with high capacity, high voltage, long cycle life, no memory effect, etc. It is widely used in digital equipment, electric bicycles, electric vehicles, energy storage and other fields. The principle of lithium-ion batteries is mainly to store lithium, that is, to store electrons. When charging, lithium ions are extracted from the positive electrode and inserted into the negative electrode through the electrolyte, the negative electrode is in a lithium-rich state, and the positive electrode is in a lithium-poor state. It is just the opposite during discharge. Lithium ions come out of the negative electrode and are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/137H01M4/1399H01M4/1393H01M4/133
CPCY02E60/122H01M4/137H01M4/1399H01M4/362H01M4/606H01M4/625H01M10/0525Y02E60/10
Inventor 魏志祥吴海平
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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