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High specific surface area vertical pore channel block-like carbon material used for supercapacitor electrode, and preparation method thereof

A high specific surface area, supercapacitor technology, used in hybrid capacitor electrodes, chemical instruments and methods, carbon compounds, etc. Effect

Inactive Publication Date: 2019-09-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth mentioning that traditional thick electrodes will have the problem of poor ion transmission due to the high tortuosity brought about by the high thickness.

Method used

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  • High specific surface area vertical pore channel block-like carbon material used for supercapacitor electrode, and preparation method thereof
  • High specific surface area vertical pore channel block-like carbon material used for supercapacitor electrode, and preparation method thereof
  • High specific surface area vertical pore channel block-like carbon material used for supercapacitor electrode, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: A kind of preparation method using potassium hydroxide activated carbonized natural wood as supercapacitor electrode material

[0028] Carbonize the sliced ​​natural wood (basswood) in a tube furnace at 700°C for 60 minutes under the protection of argon, soak the 5mm thick natural basswood wood slices in 1M KOH solution, vacuumize for 24 hours, take it out, put it in Oven dry at 60°C. Then, it was activated in a tube furnace at 700°C for 60 minutes under the protection of argon gas. After the activation treatment, the obtained sample was acid-washed and then washed to neutrality to obtain an activated porous natural wood activated carbon sample. Soak it in 2M potassium hydroxide solution to test its electrochemical performance.

[0029] figure 1 is the cross-section of the activated fir wood chips (perpendicular to the direction of tree growth and parallel to the direction of tree growth), figure 2 In order to activate the longitudinal section of the w...

Embodiment 2

[0030] Embodiment 2: A kind of preparation method using potassium hydroxide activated carbonized natural wood as supercapacitor electrode material

[0031] Prepare 3M KOH solution, stir for 30min, soak 10mm-thick beech wood chips carbonized at 700°C for 1h in the above solution, vacuumize for 36h, take it out, and dry in a vacuum oven at 70°C for 12h. Then, under the protection of argon in a tube furnace, it was activated at 800°C for 60 minutes, and the activated porous carbon electrode material was obtained by acid-washing the activated material and washing it with water until neutral. With 1M sulfuric acid solution (H 2 SO 4 ) for the electrolyte to test its electrochemical performance.

Embodiment 3

[0032] Embodiment 3: A kind of preparation method using potassium hydroxide activated carbonized natural wood as supercapacitor electrode material

[0033] Prepare 2M KOH solution, stir for 30min, soak 3mm-thick ironwood chips carbonized at 1000°C for 1h in the above solution, vacuumize for 48h, take it out, and dry in a vacuum oven at 70°C for 12h. Then, under the protection of argon in a tube furnace, activate at 800° C. for 300 min, pickle the activated material and wash it with water until neutral to obtain the activated porous carbon electrode material. With 1M sulfuric acid solution (H 2 SO 4 ) for the electrolyte to test its electrochemical performance.

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Abstract

The invention relates to a high specific surface area vertical pore channel block-like carbon material used for a supercapacitor electrode, and a preparation method thereof, wherein the specific surface area of the bulk-like carbon material can be substantially improved through alkali solution immersion and high temperature activation, the morphology can be maintained, and the obtained bulk-like carbon material has hydrophilicity and high electrical conductivity. According to the present invention, the method has advantages of simple process, time saving, safety and low cost, is suitable for large-scale industrial production, and breaks through the limitation in the only activation of the carbon powder in the prior art; and after the carbonization, the specific surface area is increased, the electric conductivity is good, and the original macro structure of the bulk-like material can be maintained.

Description

technical field [0001] The invention belongs to the field of carbon material energy storage, and in particular relates to a block carbon material used for a vertical channel with a high specific surface area of ​​a supercapacitor electrode and a preparation method thereof, which is essentially a method for activating the carbon material by using a chemical method. Background technique [0002] After the advent of the 21st century, the population density has gradually increased, and the quality of human life has continued to improve. At the same time, the energy and resources that people rely on for survival are increasingly exhausted, and people blindly pursue economic development, causing huge damage to the environment. Harsh environmental conditions are forcing countries to work hard to find new sources of sustainable energy and advanced energy storage technologies. Making super capacitors is a new technology between making batteries and electrolytic capacitors. Compared ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/348H01G11/24H01G11/34
CPCC01B32/318C01B32/348H01G11/24H01G11/34Y02E60/13
Inventor 李晓锋戴千伍敬曾美娇于中振
Owner BEIJING UNIV OF CHEM TECH
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