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Method for preparing hollow tubular activated carbon electrode material for supercapacitor

A technology for supercapacitors and electrode materials, which is applied in the field of preparation of supercapacitor electrode materials, can solve the problems of no mesoporous activated carbon materials for supercapacitors, and achieve the effects of increasing additional economic value, reducing mining, and high specific surface area

Active Publication Date: 2015-03-04
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the preparation of mesoporous activated carbon materials for supercapacitors through appropriate treatment of cotton.

Method used

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  • Method for preparing hollow tubular activated carbon electrode material for supercapacitor
  • Method for preparing hollow tubular activated carbon electrode material for supercapacitor
  • Method for preparing hollow tubular activated carbon electrode material for supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Wash the cotton, remove the sundries and grease, and get clean, silky cotton;

[0036] Step 2: Vacuum dry the clean cotton at 80°C;

[0037] Step 3: Place the dried cotton in a crucible, under nitrogen, at 2°C min -1 The heating rate is increased to 300°C, and the carbonization is carried out at a constant temperature for 30 minutes;

[0038] Step 4: Mix the carbonized cotton obtained in Step 3 with the alkaline activator at a mass ratio of 2:1, and heat the mixture at a temperature of 2°C min -1 The heating rate is increased to 700°C, and nitrogen protection gas is used throughout the process;

[0039] Step 5: The activated carbon material obtained in step 4 is cooled to room temperature with the furnace, washed to neutrality, and then dried at a temperature of 100°C to obtain a hollow activated carbon electrode material for a supercapacitor.

Embodiment 2

[0041] Step 1: Same as Step 1 of Example 1

[0042] Step 2: Same as Step 2 of Example 1

[0043] Step 3: Place the dried cotton in a crucible, under nitrogen, at 5°C min -1 The heating rate is raised to 400 ° C, and the carbonization is carried out at a constant temperature for 30 minutes;

[0044] Step 4: Mix the carbonized cotton obtained in Step 3 with the alkaline activator at a mass ratio of 3:1, and heat the mixture at a temperature of 3°C min -1 The heating rate is increased to 800°C, and nitrogen protection gas is used throughout the process;

[0045]Step 5: The activated carbon material obtained in step 4 is cooled to room temperature with the furnace, washed to neutrality, and then dried at a temperature of 100°C to obtain a hollow activated carbon electrode material for a supercapacitor.

Embodiment 3

[0047] Step 1: Same as Step 1 of Example 1

[0048] Step 2: Same as Step 2 of Example 1

[0049] Step 3: Put the dried cotton in a crucible, under nitrogen condition, at 10°C min -1 The heating rate is increased to 500°C, and the carbonization is carried out at a constant temperature for 60 minutes;

[0050] Step 4: Mix the carbonized cotton obtained in Step 3 with the alkaline activator at a mass ratio of 4:1, and heat the mixture at a temperature of 5°C min -1 The heating rate is increased to 900°C, and nitrogen protection gas is used throughout the process;

[0051] Step 5: The activated carbon material obtained in step 4 is cooled to room temperature with the furnace, washed to neutrality, and then dried at a temperature of 100°C to obtain a hollow activated carbon electrode material for a supercapacitor.

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PUM

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Abstract

The invention discloses a method for preparing a hollow tubular activated carbon electrode material for a supercapacitor from cotton. The method comprises the following steps: removing impurities from a cotton raw material, washing, drying carbonizing, mixing the cotton raw material with an alkaline activator for activation, washing, drying and the like to obtain the hollow tubular activated carbon electrode material for the supercapacitor. The electrode material for the supercapacitor, which is prepared by the method, has a relatively high specific surface area and a relatively good capacitance characteristic, and has a special hollow tubular morphology. The method is of great significance in increasing the economic added value of the cotton, reducing exploitation of a high-quality coal resource so as to realize a concept of low carbon, environment friendliness and green living, improving the performance of the supercapacitor and reducing the production cost.

Description

technical field [0001] The invention relates to a method for preparing hollow tubular activated carbon electrode materials for supercapacitors, and belongs to the field of preparation of supercapacitor electrode materials. Background technique [0002] Supercapacitor is a new type of energy storage device between ordinary capacitors and batteries. It not only has the advantages of high power density of ordinary capacitors and high energy density of secondary batteries, but also has fast charge and discharge rates, long cycle life, Many characteristics of environmental friendliness. It can be used in conjunction with lithium batteries in the field of electric vehicles to provide or recover energy for the starting and braking of electric vehicles. At the same time, it also has broad application prospects in the fields of information technology and aerospace. In recent years, with the continuous expansion of the application field of supercapacitors, capacitors have begun to e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 李建玲晏刚代宇薛庆瑞朱治勋徐国锋
Owner UNIV OF SCI & TECH BEIJING
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