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Preparation method of petroleum coke base high specific surface area activated carbon used for supercapacitor

A supercapacitor, high specific surface area technology, used in chemical instruments and methods, hybrid capacitor electrodes, inorganic chemistry, etc., can solve problems such as activation difficulties, limit the improvement of specific surface area and specific volume, etc. The effect of equal performance and reduced activation difficulty

Inactive Publication Date: 2015-04-29
JIANGXI UNIVERSITY OF FINANCE AND ECONOMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the compact structure of petroleum coke, the activation is difficult, which limits the improvement of its specific surface area and specific volume.

Method used

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  • Preparation method of petroleum coke base high specific surface area activated carbon used for supercapacitor
  • Preparation method of petroleum coke base high specific surface area activated carbon used for supercapacitor
  • Preparation method of petroleum coke base high specific surface area activated carbon used for supercapacitor

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Embodiment 1

[0014] The petroleum coke is crushed, ground, and the powder with a particle size of 104-124 μm is screened as the raw material. The powdered petroleum coke was put into a crucible furnace, and the temperature was raised to 400 °C at a rate of 20 °C / min under the protection of nitrogen, and then carbonized for 1 h to obtain carbonized petroleum coke. Add 20% H in carbonized petroleum coke 2 o 2 , and poured into a high-pressure reactor to react at 80 °C for 8 h, the product was suction-filtered, washed repeatedly until neutral, and oxidized petroleum coke was obtained. Mix KOH and oxidized petroleum coke according to the mass ratio of KOH: petroleum coke = 3:1, put the mixture into a crucible furnace, raise the temperature to 800 °C at the same heating rate under the protection of nitrogen, keep it warm for 2 h, and put The product was boiled with HCl aqueous solution for 5 min, washed repeatedly with deionized water until neutral, and activated carbon was obtained. image ...

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Abstract

The invention relates to a preparation method of petroleum coke base high specific surface area activated carbon used for a supercapacitor. The method comprises the following steps of: crushing, grinding and screening petroleum coke, and carbonizing powdered petroleum coke at a certain temperature to obtain carbonized petroleum coke; carrying out oxidation treatment on the carbonized petroleum coke by using H2O2 by adopting a hydrothermal method to obtain oxidized petroleum coke; mixing KOH and the oxidized petroleum coke according to a certain mass ratio, then activating, boiling a product with an HCL aqueous solution, and cleaning with deionized water to obtain activated carbon. The preparation method has the advantages that the activation difficulty of the petroleum coke is reduced through adjusting the structure of petroleum coke graphite crystallite so as to improve the properties of specific surface area, specific volume and the like of the activated carbon.

Description

technical field [0001] The invention relates to a preparation method of petroleum coke-based activated carbon for supercapacitors. Background technique [0002] As a new type of energy storage element, supercapacitors have a very wide range of applications and a huge potential market, and have attracted the attention of governments and enterprises in various countries. According to different energy storage principles, supercapacitors can be divided into electric double layer capacitors and pseudocapacitors. The electrode materials of pseudocapacitors include metal oxides and conductive polymers, and the electrode materials of electric double layer capacitors are mainly various high specific surface area carbon materials. The electrode material used in industrialized supercapacitors is mainly activated carbon. Petroleum coke is an ideal raw material for the preparation of activated carbon with high specific surface area due to its abundant raw materials, high carbon content...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/12H01G11/24C01B32/33C01B32/348
CPCY02E60/13
Inventor 邓梅根王仁清冯义红
Owner JIANGXI UNIVERSITY OF FINANCE AND ECONOMICS