Flexible three-dimensional porous carbon material and preparation method and application thereof

A three-dimensional porous, carbon material technology, used in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as increasing the diffusion distance and resistance of electrolyte ions and charges, affecting fast charging/discharging capabilities, and reducing capacitor performance. , to achieve the effect of excellent cycle stability, excellent capacitance performance, and improved energy density and power density

Inactive Publication Date: 2018-05-25
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large particle size and poor conductivity of activated carbon prepared by traditional methods, this increases the diffusion distance and resistance of electrolyte ions and charges, which seriously affects its fast charge / discharge capability, especially at high current densities, resulting in reduced performance of capacitors

Method used

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  • Flexible three-dimensional porous carbon material and preparation method and application thereof
  • Flexible three-dimensional porous carbon material and preparation method and application thereof
  • Flexible three-dimensional porous carbon material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: provide the three-dimensional porous carbon material prepared according to the method of the present invention and its application

[0038] Cut a 5 cm × 3 cm × 2 cm piece of melamine foam sponge, ultrasonically clean it with acetone for 30 min, and dry at 100°C; weigh 40 parts of coal tar pitch and dissolve it in 30 parts of tetrahydrofuran; weigh 20 parts of KOH and dissolve it in 20 parts of absolute ethanol; The above two solutions were mixed, and the mixed solution was magnetically stirred at room temperature for 10 min, put into a melamine sponge, fully impregnated and evenly absorbed, and then dried; the dried coal tar pitch foam-sponge composite was transferred to a ceramic crucible, and placed in a tube furnace , under the protection of Ar, heated to 900 °C for carbonization and activation; the resulting carbon material was soaked in 2 M HCl solution for 10 h, filtered, and vacuum-dried at 110 °C to obtain a three-dimensional porous carbon material....

Embodiment 2

[0040] Embodiment 2: provide the three-dimensional porous carbon material prepared according to the method of the present invention and its application

[0041] Cut a 5 cm × 3 cm × 2 cm piece of melamine foam sponge, ultrasonically clean it with acetone for 10 min, and dry at 70°C. Weigh 20 parts of coal tar pitch and dissolve it in 20 parts of tetrahydrofuran, weigh 80 parts of KOH and dissolve it in 40 parts of absolute ethanol. The above two solutions (tetrahydrofuran and ethanol solution) were mixed, and the mixed solution was magnetically stirred at room temperature for 10 min, put into a melamine sponge, fully impregnated and evenly absorbed, and then dried; the dried coal tar pitch foam-sponge composite was transferred to a ceramic crucible, placed in a tube furnace at N 2Under protection, it was heated to 800 °C for pyrolysis; the obtained carbon material was soaked in 2M HCl solution for 10 h, filtered, and vacuum-dried at 100 °C to obtain a three-dimensional porous c...

Embodiment 3

[0043] Embodiment 3: provide the three-dimensional porous carbon material prepared according to the method of the present invention and its application

[0044] Cut a 5 cm × 3 cm × 2 cm piece of melamine foam sponge, ultrasonically clean it with acetone for 10 min, and dry it at 100°C. Weigh 40 parts of coal tar pitch and dissolve it in 30 parts of tetrahydrofuran, weigh 60 parts of KOH and dissolve it in 30 parts of absolute ethanol, and The above two solutions (tetrahydrofuran and ethanol solution) were mixed, and the mixed solution was magnetically stirred at room temperature for 10 min, put into a melamine sponge, fully impregnated and evenly absorbed, and then dried; the dried coal tar pitch foam-sponge composite was transferred to a ceramic crucible, placed in a tube furnace at N 2 Under protection, it was heated to 800 °C for pyrolysis; the obtained carbon material was soaked in 2M HCl solution for 10 h, filtered, and vacuum-dried at 110 °C to obtain a three-dimensional...

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Abstract

The invention discloses a flexible three-dimensional porous carbon material and a preparation method and application thereof. The method adopts a commercial melamine sponge which is low in cost as a three-dimensional flexible carbon skeleton template, and coal pitch as a carbon source, and obtains the flexible three-dimensional porous carbon material which is high in conductivity and high in specific surface area in one step through a KOH activation method; and the material is simple in preparation process, low in cost and suitable for industrial application. The material serves as a super capacitor electrode material, and has larger energy density, power density and excellent cycle stability.

Description

technical field [0001] The invention relates to a flexible three-dimensional porous carbon material and its preparation method and application, belonging to the technical field of new energy materials. Background technique [0002] As an electrochemical energy storage device, supercapacitor has a series of advantages such as high energy density, long cycle life, small size, simple and portable, safe and non-polluting, and is widely used in mobile communications, information technology, consumer electronics, electric vehicles, aerospace It has broad application prospects in national defense science and technology, and is considered to be an ideal chemical power source. At present, commercial supercapacitors mainly use activated carbon as the electrode material. The performance of supercapacitors mainly depends on the specific surface area, pore size distribution, microstructure and conductivity of the electrode materials used. [0003] Compared with other carbon materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/32H01G11/86
CPCY02E60/13H01G11/24H01G11/32H01G11/86
Inventor 王延忠王东华陈优李莹王慧奇刘炜薛超瑞董英鸽杨金龙
Owner ZHONGBEI UNIV
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