Method for preparing bamboo shoot shell-based activated carbon for super capacitor

A technology of supercapacitor and bamboo shoot shell, which is applied to the preparation of bamboo shoot shell-based activated carbon for supercapacitors and the field of activated carbon preparation, can solve the problems of no activated carbon performance parameters and application, performance needs to be improved, and application performance is limited, and achieves good commercial application. Prospects, easy to large-scale industrial production, the effect of abundant resources

Inactive Publication Date: 2015-09-09
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main raw materials of commercial activated carbon produced in my country are coal, wood and wooden fruit shell cores, etc. Activated carbon produced from wooden fruit shell cores has limited application performance in supercapacitors. Although the technology of producing activated carbon from coal and wood is relatively mature, the performance is still to be determined. improve
And the use of coal as a raw material also has some obvious defects: the price of coal is high, it is a non-renewable resource, and the activated carbon prepared by it contains heavy metals and othe

Method used

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  • Method for preparing bamboo shoot shell-based activated carbon for super capacitor
  • Method for preparing bamboo shoot shell-based activated carbon for super capacitor
  • Method for preparing bamboo shoot shell-based activated carbon for super capacitor

Examples

Experimental program
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Example Embodiment

[0030] Example 1

[0031] Soak the bamboo shoot shells in water, wash them clean, put them in an oven, and dry them at a constant temperature of 100°C for 12 hours. Cut the dried bamboo shoots into about 0.5cm 2size fragments. Then weigh 1kg of bamboo shoot shell fragments, put them into a vacuum furnace, pass argon protection, set the heating rate to 5°C / min, raise the temperature to 350°C, hold the temperature for 1 hour, and then raise the temperature to 600°C at a heating rate of 10°C / min. Constant temperature for 2h. Grind the obtained bamboo shoot shell carbonization product into fine powder, pass through a 200-mesh sieve, soak the powder with nitric acid with a mass fraction of 5%, heat to boiling, reflux for 1 hour, cool to room temperature, filter, and wash the bamboo shoot shell carbonization product to the filtrate. Neutral. The filter cake was put into a blast drying oven and dried at a constant temperature of 80°C for 12 hours to obtain bamboo shoot charcoal. ...

Example Embodiment

[0032] Example 2

[0033] Soak the bamboo shoot shells in water, wash them clean, put them in an oven, and dry them at a constant temperature of 100°C for 12 hours. Grind the dried bamboo shoots into powder. Then weigh 1kg of bamboo shoot shell powder, put it into a vacuum furnace, pass nitrogen protection, set the heating rate to 5°C / min, raise the temperature to 350°C, keep the temperature constant for 1h, then raise the temperature to 500°C at a heating rate of 10°C / min, and keep the constant temperature. 2h. Grind the obtained bamboo shell carbonization product into fine powder, pass through a 200-mesh sieve, soak the powder with hydrochloric acid with a mass fraction of 10%, heat to boiling, reflux for 1 hour, cool to room temperature, filter, and wash the bamboo shoot shell carbonization product to filtrate. Neutral. The filter cake was put into a blast drying oven and dried at a constant temperature of 80°C for 12 hours to obtain bamboo shoot charcoal. Weigh 100g dr...

Example Embodiment

[0034] Example 3

[0035] Soak the bamboo shoot shells in water, wash them clean, put them in an oven, and dry them at a constant temperature of 100°C for 12 hours. Cut the dried bamboo shoots into about 1cm 2 size fragments. Then weigh 1kg of bamboo shoot shell fragments, put them in a vacuum furnace, pass nitrogen protection, set the heating rate to 5°C / min, raise the temperature to 350°C, hold the temperature for 1 hour, then raise the temperature to 500°C at a heating rate of 10°C / min, and keep the constant temperature. 2h. Grind the obtained bamboo shell carbonization product into fine powder, pass through a 200-mesh sieve, soak the powder with hydrochloric acid with a mass fraction of 10%, heat to boiling, reflux for 1 hour, cool to room temperature, filter, and wash the bamboo shoot shell carbonization product to filtrate. Neutral. The filter cake was put into a blast drying oven and dried at a constant temperature of 80°C for 12 hours to obtain bamboo shoot charcoa...

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Abstract

The invention discloses a method for preparing bamboo shoot shell-based activated carbon for a super capacitor. The method comprises the following steps of firstly carrying out pretreatment processes such as washing and drying on raw material bamboo shoot shells; then carbonizing the bamboo shoot shells at high temperature, treating by acid to remove trace metal elements, washing by using distilled water and drying; finally, activating, washing and drying to obtain bamboo shoot shell-based activated carbon. The bamboo shoot shell-based activated carbon is tubular in microstructure, the micropore structure is developed, the specific surface area is as high as 3162m<2>/g, and the specific capacitance is as high as 308Fg<-1> when the electric current density is 1Ag<-1>; when the electric current density is 2Ag<-1>, the specific capacitance has no attenuation basically and is as high as 271Fg<-1> after 10000 times of circulation, and thus the cycle performance is excellent, so that the bamboo shoot shell-based activated carbon has good application prospects in the fields of super capacitors and energy storage. In addition, according to the invention, the bamboo shoot shells are taken as raw materials, so that the comprehensive utilization of the wastes is realized.

Description

technical field [0001] The invention relates to a preparation method of activated carbon, in particular to a preparation method of bamboo shoot shell-based activated carbon for supercapacitors, and belongs to the technical field of material preparation. technical background [0002] Supercapacitor is a new type of energy storage device between traditional capacitors and chemical power sources. It has some advantages that traditional capacitors and batteries do not have: high power density, long cycle life, fast charging, and no pollution to the environment. It has broad application prospects in the fields of electric vehicles, information technology, aerospace, and national defense technology. With the development of new application fields, people's demand for supercapacitors with high specific capacity and good stability is becoming more and more urgent. [0003] A supercapacitor is mainly composed of four parts, namely a current collector, an electrolyte, an electrode mate...

Claims

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Application Information

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IPC IPC(8): C01B31/12
Inventor 王先友张友为赵青蓝高姣刘佳舒洪波杨秀康
Owner XIANGTAN UNIV
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