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Preparation method of cotton fiber coal-base material, and application thereof as electrode material of supercapacitor

A cotton fiber and carbon-based material technology is applied in the field of preparation of cotton fiber and carbon-based materials, and can solve the problems of high cost and complicated preparation process.

Inactive Publication Date: 2013-02-27
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used carbon materials include carbon nanotubes, carbon aerogels, activated carbon, graphene, etc., but due to the complex preparation process and high cost of these materials, their application in supercapacitors is limited, so people will focus on Focus on biomass raw materials

Method used

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  • Preparation method of cotton fiber coal-base material, and application thereof as electrode material of supercapacitor
  • Preparation method of cotton fiber coal-base material, and application thereof as electrode material of supercapacitor
  • Preparation method of cotton fiber coal-base material, and application thereof as electrode material of supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 1.0 g of cotton, wash it with deionized water and ethanol several times, and dry it in a vacuum oven at 60 °C; pre-carbonize the dried cotton at 300–350 °C for 3–5 h, and then dry it under N 2 Under protection, the activated cotton fiber was carbonized at 700 °C for 3 h; then the carbonized cotton was soaked in 50 ml 10 % KOH solution, soaked at 70 °C for 2 h, cooled to room temperature, filtered, and then soaked in 50 ml 1 M Soak in HCl for 12 h, finally wash with deionized water until neutral, and dry to obtain a cotton fiber carbon-based material.

[0022] Cotton fiber carbon-based material at 1 mol / L H 2 SO 4 The specific capacitance in the electrolyte is 185 F g -1 .

Embodiment 2

[0024] Weigh 1.0 g of cotton, wash it with deionized water and ethanol three times, and dry it in a vacuum oven at 60 °C; pre-carbonize the dried cotton at 300–350 °C for 3–5 h, and then dry it under N 2 Under protection, the activated cotton fiber was carbonized at 800 °C for 6 h; then the carbonized cotton was soaked in 50 ml 30 % KOH solution, soaked at 50 °C for 4 h, cooled to room temperature, filtered, and then soaked in 50 ml 1 M Soak in HCl for 8 h, finally wash with deionized water until neutral, and dry to obtain cotton fiber carbon-based materials.

[0025] Cotton fiber carbon-based material at 1 mol / L H 2 SO 4 The specific capacitance in the electrolyte is 193 F g -1 .

Embodiment 3

[0027] Weigh 1.0 g of cotton, wash it with deionized water and ethanol several times, and dry it in a vacuum oven at 60 °C; pre-carbonize the dried cotton at 300–350 °C for 3–5 h, and then dry it under N 2 Under protection, the activated cotton fiber was carbonized at 900 °C for 3 h; then the carbonized cotton was soaked in 50 ml 20 % KOH solution, soaked at 80 °C for 2 h, cooled to room temperature, filtered, and then soaked in 50 ml 1 M Soak in HCl for 16 h, finally wash with deionized water until neutral, and dry to obtain a cotton fiber carbon-based material.

[0028] Cotton fiber carbon-based material at 1 mol / L H 2 SO 4 The specific capacitance in the electrolyte is 201 F g -1 .

[0029] In the above examples, the electrochemical performance evaluation system of cotton fiber carbon-based materials is completed in a conventional three-electrode system, and the CHI 660D electrochemical workstation of Shanghai Chenhua Co., Ltd. is used for testing; the cycle stability te...

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Abstract

The invention provides a preparation method of a cotton fiber coal-base material, which comprises the steps of: washing cotton fiber respectively with deionized water and ethanol, and then drying; maintaining the dried cotton fiber at the temperature of 300-350 DEG C for 3-5 hours, and carrying out pre-carbonization; under the protection of N2, carrying out carbonization for 3-6 hours at the temperature of 700-900 DEG C; after that, soaking the carbonized cotton fiber into KOH solution with the mass concentration of 10-30% for 2-5 hours at the temperature of 50-80 DEG C; cooling to the room temperature, filtering and soaking the product in 1-3M of HCl for 6-18 hours; and finally, washing the product to be neutral with deionized water, and drying to obtain the cotton fiber coal-base material. The experiments prove that the cotton fiber coal-base material has higher specific capacitance so as to be used as electrode material of a supercapacitor, and has the characteristics of being rich in material source, simple in preparation technology, low in cost, environment-friendly, excellent in conductivity and other electrochemical performances, and the like, thus being an ideal electrode material of the supercapacitor.

Description

technical field [0001] The invention relates to a preparation method of a cotton fiber carbon-based material, which belongs to the field of polymer materials; the invention also relates to the application of the cotton fiber carbon-based material as an electrode material of a supercapacitor. Background technique [0002] With the rapid development of social economy and the depletion of fossil energy, the existing traditional energy system can no longer meet today's needs, and the process of using coal and oil has also caused serious environmental pollution. Therefore, the development of new energy and renewable clean energy is a problem that must be solved in today's world economy. As a new type of energy storage element, supercapacitor has received more and more attention and has become an important part of the new energy application field in the 21st century. [0003] Supercapacitors have the advantages of high power density, long cycle life, fast charging speed, wide ope...

Claims

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Application Information

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IPC IPC(8): C01B31/02H01G9/042C01B32/05
CPCY02E60/13
Inventor 马国富牟晶晶彭辉雷自强
Owner NORTHWEST NORMAL UNIVERSITY
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