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Preparation method of carbon electrode material and application thereof

A carbon electrode and carbon material technology, which is applied in the field of carbon electrode material preparation, can solve the problems of low specific capacitance of carbon materials, etc., and achieve the effects of improving electric double layer capacitance, good application prospect and easy operation.

Active Publication Date: 2016-08-31
HUAZHONG UNIV OF SCI & TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for preparing carbon electrode materials, the purpose of which is to use chestnut shells as raw materials and carry out nitrogen doping on this basis, thereby solving the problem of prior art preparation. The technical problem of low specific capacitance of carbon materials

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  • Preparation method of carbon electrode material and application thereof
  • Preparation method of carbon electrode material and application thereof
  • Preparation method of carbon electrode material and application thereof

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preparation example Construction

[0026] The invention provides a kind of preparation method of carbon electrode material, comprises the following steps:

[0027] (1) Mix the activator, chestnut shell and water uniformly according to the mass ratio of 1:(0.2~1):(1~3), and fully dry, and then calcinate at 600℃~800℃ for 1h in an inert atmosphere ~5h, so that the mixture is fully carbonized and activated to obtain the primary product of carbon materials, the mass ratio of the activator to the dried chestnut shell is preferably 3:1~3:2; wherein the activator is KOH, NaOH , ZnCl 2 , Ca(NO 3 ) 2 One or more in; the inert atmosphere is one or more in nitrogen, helium or argon; Wherein, the effect of water is to make the dried chestnut shell and activator mix more uniformly, if the amount of water is too little It is easy to mix unevenly, and if the amount of water is too much, the drying time will be longer, which will affect the efficiency of the experiment. When the chestnut shells are fresh chestnut shells that...

Embodiment 1

[0034] (1) Mix 5 g of dried chestnut shells, 10 g of KOH, and 20 mL of water evenly, then dry them, place them in a tube furnace, raise the temperature to 600 °C at a rate of 3 °C / min in a nitrogen atmosphere, and keep for 1.5 h;

[0035](2) The resulting carbonized product was then washed with 10% dilute hydrochloric acid, then washed with deionized water until neutral, and dried in an oven to obtain 0.40 g of the product;

[0036] (3) Mix the dried product, melamine, and water evenly at a mass ratio of 1:1:2, place them in a tube furnace, and raise the temperature to 600°C at a heating rate of 3°C / min under a nitrogen atmosphere. Keep for 1.5h;

[0037] (4) The obtained product was washed again with dilute hydrochloric acid (10wt%), then washed with deionized water until neutral, and dried in an oven to obtain a chestnut shell-based nitrogen-doped carbon electrode material.

Embodiment 2

[0039] (1) Mix 5 g of dried chestnut shells, 10 g of KOH, and 20 mL of water evenly, then dry them, place them in a tube furnace, raise the temperature to 600 °C at a rate of 3 °C / min in a nitrogen atmosphere, and keep it for 1.5 h;

[0040] (2) Subsequently, the obtained carbonized product was washed once with dilute hydrochloric acid (10 wt%), then washed with deionized water until neutral, and dried in an oven to obtain 0.38 g of the product;

[0041] (3) The dried product, melamine and water were mixed evenly according to the mass ratio of 1:2:4, and then placed in a tube furnace, and the temperature was raised to 600°C at a heating rate of 3°C / min under a nitrogen atmosphere. Keep for 1.5h;

[0042] (4) The obtained product was washed again with dilute hydrochloric acid, then washed with deionized water to neutrality, placed in an oven for drying, and the chestnut shell-based nitrogen-doped carbon electrode material was obtained.

[0043] Take 40mg of the prepared carbon...

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Abstract

The invention discloses a preparation method of a carbon electrode material and an application thereof. The method comprises the steps of firstly uniformly mixing an activator, chestnut shells and water according to a mass ratio of 1: (0.2-1): (1-3), sufficiently drying the components, and calcining in an inert atmosphere at a temperature of 600-800 DEG C for 1-5 hours, thereby obtaining a carbon material primary product, wherein the activator is one component or multiple components selected from KOH, NaOH, ZnCl2 and Ca(NO3)2; then eliminating inorganic salts and oxide impurities in the carbon material primary product, thereby obtaining a chestnut shell based carbon material; and finally uniformly mixing the chestnut shell based carbon material, melamine and water according to a mass ratio of 1: (1-10): (2-20), and then calcining in the inert atmosphere at the temperature of 600-800 DEG C for 1-5 hours, thereby obtaining the carbon electrode material. Through the preparation method, the chestnut shell based carbon material is doped for preparing the carbon electrode material; the carbon electrode material is applied in a super-capacitor; and furthermore the carbon electrode material has high electrochemical performance and has relatively good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of porous carbon materials and their application in the field of supercapacitors, and more specifically relates to a preparation method and application of a carbon electrode material. Background technique [0002] Supercapacitor is a new type of energy storage device between traditional capacitors and secondary batteries. Compared with traditional rechargeable batteries, it has higher power density and higher energy density than traditional electrostatic capacitors. Due to the advantages of fast discharge, long cycle life, green and pollution-free, and wide temperature range, it is widely used in electronics, communications, electric vehicles, aerospace and other fields. [0003] Electrode materials are an important part of supercapacitors, and carbon electrode materials occupy a dominant position in the electrode materials of supercapacitors due to their stable physical and chemical properties, good el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/44H01G11/86
CPCY02E60/13H01G11/44H01G11/86
Inventor 胡敬平武龙胜聂鹏茹袁喜庆黄龙朱小磊侯慧杰刘冰川杨家宽吴旭梁莎
Owner HUAZHONG UNIV OF SCI & TECH
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