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Porous carbon material based on high-temperature thermal shock carbonization and KOH activation of coconut shell material, preparation method and application

A technology of porous carbon materials and coconut shell materials, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low efficiency and hindering development of electrochemical electrode materials, and achieve rich pores, narrow pore size distribution, The effect of high specific capacity

Pending Publication Date: 2022-04-29
山东润生生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the direct use of high-temperature thermal shock carbonization of biomass materials as electrochemical electrode materials is not efficient, which hinders further development. Therefore, how to use high-temperature thermal shock carbonization to prepare biomass materials with good electrochemical properties is of great significance.

Method used

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  • Porous carbon material based on high-temperature thermal shock carbonization and KOH activation of coconut shell material, preparation method and application
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  • Porous carbon material based on high-temperature thermal shock carbonization and KOH activation of coconut shell material, preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0034] (1) Cut the purchased dried coconut husk into finely divided pieces, and manually grind it in a mortar for 1 hour until the material is ground into particles with a diameter of 50-100 μm and a higher degree of uniformity.

[0035] (2) Utilize the ball mill to continue to grind the coconut shell particles (using the agate ball mill jar), the grinding time is set to 10h, and the rotating speed is set to 300r / min, finally the coconut shell powder with a particle diameter of 5 μm can be obtained.

[0036] (3) The first step of HT treatment is carried out on the obtained coconut shell powder (heat shock temperature is 800°C), the specific process is as follows: the treated carbon cloth with a size of 1*1.5cm is glued to two pieces of glass through conductive glue The copper foils on the boards are connected on the narrow side (there is a 1cm wide gap between the two glass plates, and the coconut shell powder is evenly coated on the carbon cloth), and the coconut shell powder ...

Embodiment 2

[0039] (1) Cut the purchased dried coconut husk into finely divided pieces, and manually grind it in a mortar for 1 hour until the material is ground into particles with a diameter of 50-100 μm and a higher degree of uniformity.

[0040] (2) Utilize the ball mill to continue to grind the coconut shell particles (using agate-made ball milling tank), the grinding time is set to 10h, and the rotating speed is set to 300r / min, and finally the coconut shell powder with a particle diameter of 20 μm can be obtained.

[0041] (3) The first step of HT treatment is carried out on the obtained coconut shell powder (the thermal shock temperature is 900 ° C). The surface of the coconut shell material after one HT process is smooth and there are no obvious pores, indicating that one HT process cannot treat coconut shells. The shell powder is effectively carbonized and activated.

[0042] (4) Weigh 1 mg of coconut shell pre-carbonized powder completed by high-temperature thermal shock carbon...

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Abstract

The invention discloses a porous carbon material based on high-temperature thermal shock carbonization and KOH activation of a coconut shell material as well as a preparation method and application of the porous carbon material. The preparation method comprises the following steps: grinding the coconut shell material into particles, and then carrying out first thermal shock carbonization to obtain a coconut shell pre-carbonized material; the coconut shell pre-carbonized material and KOH powder are mixed and ground uniformly and then subjected to secondary thermal shock carbonization to obtain the porous carbon material, the preparation steps are simple, the consumed time is short, and the porous carbon material can be applied to a supercapacitor. When the proportioning ratio of the coconut shell pre-carbonized material to KOH is 1: 3, the prepared porous carbon electrode material shows the structural characteristics of large specific surface area, narrow pore size distribution and abundant pores, the electrochemical performance of the electrode material is improved, the specific performance is high specific capacitance of 225.15 F g <-1 > and good rate capability, and after the current density is increased by 10 times, the specific capacitance of the electrode material is greatly improved. And the specific capacitance can still reach 140.45 F g <-1 >. The preparation method is low in cost and simple and convenient to operate, has high specific capacitance and good rate capability, and is a promising electrode material applied to supercapacitors.

Description

technical field [0001] The invention belongs to the field of supercapacitors in new energy materials, and in particular relates to the preparation of a porous carbon material based on high-temperature thermal shock carbonization and KOH activation of coconut shell materials and its application in supercapacitors. Background technique [0002] Since the industrial revolution, traditional fossil energy sources such as coal, oil, and natural gas have driven the continuous development and progress of human society. However, the use of these types of non-renewable resources will produce by-products that are harmful to the environment and human body, such as CO and other toxic substances. gas, and CO in combustion products 2 will exacerbate the greenhouse effect. Therefore, with the rapid growth of population and people's strong demand for a better life, the development and innovation of new energy technology is particularly important. In recent years, China has made long-term s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/348H01G11/34H01G11/44H01G11/86
CPCC01B32/324C01B32/348H01G11/34H01G11/44H01G11/86Y02E60/13
Inventor 不公告发明人
Owner 山东润生生物科技有限公司
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