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Method for manufacturing electrode material of supercapacitor by cotton-stalk-based active carbon material

A technology for supercapacitors and electrode materials, applied in the field of electrochemistry, can solve problems such as low power density, long charging time, and preparation of activated carbon materials for supercapacitors

Inactive Publication Date: 2012-10-17
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common characteristics of lead-acid, nickel-cadmium, nickel-metal hydride, and lithium-ion batteries currently on the market are high energy density, but low power density and long charging time
Therefore, it is difficult to meet the application fields of energy storage devices that require high power density (such as aerospace and modern weaponry, etc.), and these traditional batteries cannot meet the demand at all.
At present, there is no report on the production of activated carbon materials for supercapacitors by treating cotton stalks with appropriate methods.

Method used

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  • Method for manufacturing electrode material of supercapacitor by cotton-stalk-based active carbon material
  • Method for manufacturing electrode material of supercapacitor by cotton-stalk-based active carbon material
  • Method for manufacturing electrode material of supercapacitor by cotton-stalk-based active carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Cotton stalks are peeled, crushed, and sieved to 80 mesh to obtain granules;

[0025] b. drying the pulverized cotton stalk particles at a temperature of 80°C;

[0026] c. Mix the dried cotton stalk particles with activator H 3 PO 4 Mix and impregnate at a mass ratio of 1:4 for 12 hours;

[0027] d. drying the impregnated cotton stalk particles at a temperature of 80° C. to obtain a mixture;

[0028] e. Under the protection condition of inert gas argon, the mixture obtained in step d is raised to a temperature of 700° C. at a heating rate of 2° C. / min, and activated at a constant temperature for 2 hours. The activation reaction temperature is 700°C, the activation reaction time is 2h, and the activated carbon material is obtained;

[0029] f. The activated carbon material obtained in step e is cooled to room temperature with the furnace, taken out, washed to neutrality, and then dried at a temperature of 100°C to obtain the supercapacitor electrode material.

Embodiment 2

[0031] a. Cotton stalks are peeled, crushed, and sieved to 100 mesh to obtain granules;

[0032] b. drying the pulverized cotton stalk particles at a temperature of 80°C;

[0033] c. Mix the dried cotton stalk particles with the activator CaCl 2 Mix and impregnate for 5 hours according to the mass ratio of 1:3;

[0034] d. drying the impregnated cotton stalk particles at a temperature of 80° C. to obtain a mixture;

[0035] e. Under the protection of inert gas nitrogen, the mixture obtained in step d is raised to a temperature of 900° C. at a heating rate of 5° C. / min, and activated at a constant temperature for 3 hours. The activation reaction temperature is 900° C., and the activation reaction time is 3 hours. Activated carbon material;

[0036] f. The activated carbon material obtained in step e is cooled to room temperature with the furnace, taken out, washed to neutrality, and then dried at a temperature of 100°C to obtain the supercapacitor electrode material.

Embodiment 3

[0038] a. Cotton stalks are peeled, crushed, and sieved to 120 mesh to obtain granules;

[0039] b. drying the pulverized cotton stalk particles at a temperature of 80°C;

[0040] c. Mix and impregnate the dried cotton stalk particles with the activator NaOH at a mass ratio of 1:2 for 7 hours;

[0041] d. drying the impregnated cotton stalk particles at a temperature of 80° C. to obtain a mixture;

[0042] e. The vacuum degree under vacuum conditions is 133.322×10 -3 -133.322×10 -5 Under the condition of Pa, the mixture obtained in step d is raised to a temperature of 600° C. at a heating rate of 3° C. / min, and activated at a constant temperature of 2.5 hours. The activated reaction temperature is 600° C., and the activation reaction time is 2.5 hours to obtain an activated carbon material;

[0043] f. The activated carbon material obtained in step e is cooled to room temperature with the furnace, taken out, washed to neutrality, and then dried at a temperature of 100°C to ...

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Abstract

The invention relates to a method for manufacturing an electrode material of a supercapacitor by a cotton-stalk-based active carbon material. The method comprises the following steps of: firstly removing skin and crushing a cotton stalk raw material, mixing and dipping with an activating agent, and carrying out processes of activation treatment, washing, drying and the like to obtain an active carbon electrode material required by the supercapacitor. The electrode material of the supercapacitor prepared by the method provided by the invention has higher specific surface area and excellent capacitance characters. An assembled simulation button type supercapacitor has higher specific capacitance, smaller equivalent series resistance, higher charge and discharge efficiencies and the like. The method disclosed by the invention is of important significance to increase an economical additional value of cotton stalk, realize sustainable development on the cotton stalk, improve the performance of supercapacitor and reduce the production cost.

Description

technical field [0001] The invention relates to a method for preparing supercapacitor electrode materials with cotton stalk-based activated carbon materials, belonging to the field of electrochemistry. Background technique [0002] The depletion of fossil energy and the problem of global warming have made people pay more and more attention to the development and utilization of renewable energy. The development and utilization of new energy has become an important issue in today's world. With the advent of the high-tech era of information technology, the form of energy applications is changing, and the demand for renewable, pollution-free, small discrete, portable high-performance power supplies is growing rapidly. The common characteristics of lead-acid, nickel-cadmium, nickel-hydrogen, and lithium-ion batteries currently on the market are high energy density, but low power density and long charging time. Therefore, it is difficult to meet the application fields of energy s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12H01G9/042C01B32/324C01B32/342C01B32/348
CPCY02E60/13
Inventor 康雪雅陈铭德吐尔迪·吾买尔韩英徐国庆窦俊青刘志强
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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