High-volume specific capacity coal-based supercapacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, applied in the field of high volume ratio capacity coal-based supercapacitor electrode materials and its preparation, can solve the problems of low volume ratio capacity of supercapacitor electrode materials, and achieve excellent fast charge and discharge performance, high volume ratio The effect of capacity and high apparent density

Active Publication Date: 2018-08-28
XINJIANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a high volume specific capacity coal-based supercapacitor electrode material and a preparation method thereof, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the volume specific capacity of the existing supercapacitor electrode material is not high

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  • High-volume specific capacity coal-based supercapacitor electrode material and preparation method thereof

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Embodiment 1

[0017] Embodiment 1: The high volume specific capacity coal-based supercapacitor electrode material is characterized in that it is obtained according to the following steps: the first step, the coal is pulverized, and after sieving treatment, coal powder is obtained, and the coal powder and the oxidant are oxidized , to obtain oxidized coal; the second step is to mix the required amount of oxidized coal and potassium hydroxide in a mass ratio of 1:0 to 4 to obtain a mixture; the third step is to compact the obtained mixture and use nitrogen as a protection The compacted mixture is carbonized, and the temperature is programmed to rise at a rate of 5°C / min from room temperature to 500°C to 1200°C to obtain a carbonized sample; in the fourth step, the carbonized sample is washed with deionized water to the washing solution When it is neutral, the washed carbonized sample is dried to obtain a high volume specific capacity coal-based supercapacitor electrode material.

[0018] The ...

Embodiment 2

[0020] Embodiment 2: The high volume specific capacity coal-based supercapacitor electrode material is characterized in that it is obtained according to the following steps: the first step, the coal is pulverized, and after sieving treatment, coal powder is obtained, and the coal powder and the oxidant are oxidized , to obtain oxidized coal; the second step is to mix the required amount of oxidized coal and potassium hydroxide in a mass ratio of 1:0.1 or 3 to obtain a mixture; the third step is to compact the obtained mixture and use nitrogen as a protection gas, carbonize the compacted mixture, and program the temperature at a rate of 5°C / min from room temperature to 500°C or 1200°C to obtain a carbonized sample; the fourth step is to wash the carbonized sample with deionized water until the washing liquid When it is neutral, the washed carbonized sample is dried to obtain a high volume specific capacity coal-based supercapacitor electrode material.

Embodiment 3

[0021] Embodiment 3: As an optimization of the above embodiment, the oxidizing agent is a mixed solution of concentrated sulfuric acid and concentrated nitric acid, wherein, in the mixed solution, the volume ratio of concentrated sulfuric acid and concentrated nitric acid is 3:1.

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Abstract

The invention relates to the technical field of supercapacitor electrode materials, and provides a high-volume specific capacity coal-based supercapacitor electrode material and a preparation method thereof. The high-volume specific capacity coal-based supercapacitor electrode material is obtained in the following steps that coal is crushed to obtain coal powder, and the coal powder and an oxidizing agent are subjected to oxidation treatment to obtain coal oxide; the coal oxide is mixed with potassium hydroxide to obtain a mixture; the obtained mixture is compacted, and the compacted mixture is carbonized to obtain a carbonized sample; the carbonized sample is washed and dried to obtain the supercapacitor electrode material. According to the method, coal wide in source serves as the raw material, and a simple and universal compacting activation method is used for preparing the porous carbon material with high apparent density, high specific surface area and high volume specific capacity, the supercapacitor electrode material has excellent rapid charge and discharge performance, the problem that the volume ratio of a supercapacitor electrode material is not high is solved, and an idea for clean and efficient utilization of coal is provided.

Description

technical field [0001] The invention relates to the technical field of supercapacitor electrode materials, and relates to a high volume specific capacity coal-based supercapacitor electrode material and a preparation method thereof. Background technique [0002] Supercapacitors are favored by researchers because of their high energy density, excellent cycle performance, low price and environmental friendliness. Electrode materials are the core of supercapacitors, and the research and development of high-performance electrode materials is the focus of research in related fields. At present, the most widely used electrode materials for supercapacitors are porous carbon materials. The carbon material prepared by the usual method has a large specific surface area and a high-quality specific capacity, but its apparent density is small, resulting in a low volume specific capacity. Consumer electronic products and electric vehicles require energy storage devices to release energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01G11/34H01G11/44
CPCH01G11/34H01G11/44Y02E60/13
Inventor 张苏朱家瑶王鲁香贾殿赠贾丽霞
Owner XINJIANG UNIVERSITY
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