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Coal-based nitrogen-doped activated carbon spherical electrode material with high specific surface area and preparation method thereof

A technology with high specific surface area and activated carbon balls, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of poor specific capacity and high current charge and discharge performance, and achieve increased yield, excellent specific capacity and High current charge and discharge performance, the effect of uniform distribution of pore structure

Active Publication Date: 2020-08-04
XINJIANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a high specific surface area coal-based nitrogen-doped activated carbon ball electrode material and its preparation method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of specific capacity and high current charge and discharge of existing supercapacitor electrode materials poor performance problem

Method used

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  • Coal-based nitrogen-doped activated carbon spherical electrode material with high specific surface area and preparation method thereof
  • Coal-based nitrogen-doped activated carbon spherical electrode material with high specific surface area and preparation method thereof
  • Coal-based nitrogen-doped activated carbon spherical electrode material with high specific surface area and preparation method thereof

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Embodiment 1

[0027] Embodiment 1: The high specific surface area coal-based nitrogen-doped activated carbon ball electrode material is obtained according to the following steps: the first step is to pulverize the coal, and after sieving to obtain ultra-fine coal powder, the ultra-fine coal powder Mix evenly with strong oxidant solution, carry out liquid-phase oxidation reaction, obtain reaction product, after purification, washing and classification of reaction product, obtain oxidized coal; second step, glucosamine and oxidized coal according to the weight ratio of 1:0.1 to Dissolve in water at a ratio of 10, and mix evenly to obtain the first mixed solution. Under the condition of 100°C to 200°C, the first mixed solution undergoes hydrothermal reaction, and the reaction product is cooled to room temperature, and the reaction is washed with deionized water and ethanol solution product until the washing solution is neutral, dry the reaction product to obtain a powder product; the third step...

Embodiment 2

[0030] Embodiment 2: The high specific surface area coal-based nitrogen-doped activated carbon spherical electrode material is obtained according to the following steps: in the first step, the coal is pulverized, and after sieving, ultrafine coal powder is obtained, and the ultrafine coal powder is Mix evenly with strong oxidant solution, carry out liquid phase oxidation reaction, obtain reaction product, after reaction product is purified, washed, graded, obtain oxidized coal; second step, glucosamine and oxidized coal are according to weight ratio 1:0.1 or Dissolve in water at a ratio of 10 and mix evenly to obtain the first mixed solution. Under the condition of 100°C or 200°C, the first mixed solution undergoes hydrothermal reaction, the reaction product is cooled to room temperature, and the reaction is washed with deionized water and ethanol solution product until the washing solution is neutral, dry the reaction product to obtain a powder product; the third step is to mi...

Embodiment 3

[0031] Embodiment 3: As an optimization of the above embodiment, the strong oxidizing agent solution is a mixed solution of concentrated sulfuric acid and concentrated nitric acid, wherein, in the mixed solution, the volume ratio of concentrated sulfuric acid to concentrated nitric acid is 3:1.

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Abstract

The invention relates to the technical field of electrode materials for supercapacitors, and discloses a high specific surface area coal-based nitrogen-doped activated carbon sphere electrode materialand a preparation method thereof. The high specific surface area coal-based nitrogen-doped activated carbon sphere electrode material is prepared according to the steps of enabling pulverized coal tobe reacted with a strong oxidant solution, performing hydrothermal reaction on obtained oxidized coal and glucosamine, mixing a powdered product obtained by washing and drying to obtain with potassium hydroxide, carrying out carbonization treatment, washing and drying an obtained mixed product to acquire a high specific surface area coal-based nitrogen-doped activated carbon sphere electrode material. According to the invention, the glucosamine is adopted to serve as a nitrogen source, the oxidized coal is adopted to serve as a carbon source, so that the yield of coal-based nitrogen-doped carbon spheres is effectively improved, and the high specific surface area coal-based nitrogen-doped activated carbon sphere electrode material is prepared. The high specific surface area coal-based nitrogen-doped activated carbon sphere electrode material has micro-nano morphology, is uniform in pore structure distribution and has excellent specific capacity and high-current charging and dischargingperformance when serving as a supercapacitor electrode material.

Description

technical field [0001] The invention relates to the technical field of electrode materials for supercapacitors, and relates to a coal-based nitrogen-doped activated carbon ball electrode material with a high specific surface area and a preparation method thereof. Background technique [0002] Supercapacitor is an important new type of energy storage device, which has attracted much attention due to its advantages such as high power density, wide operating temperature range and long cycle life. Activated carbon has always been the first choice for supercapacitors because of its cheap and easy availability, stable chemical properties, and easy adjustment of specific surface area and pore structure. Coal is one of the main raw materials for activated carbon. At present, my country's activated carbon production is about 420,000 tons per year, of which coal-based activated carbon accounts for more than 70% of the total output. Coal-based activated carbon with large specific surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/44H01G11/24H01G11/38H01G11/34H01G11/42H01G11/86
CPCH01G11/24H01G11/34H01G11/38H01G11/42H01G11/44H01G11/86Y02E60/13
Inventor 王鲁香青艳张苏朱家瑶贾殿赠贾丽霞
Owner XINJIANG UNIVERSITY
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