Composite porous carbon material and preparation method of high-power supercapacitor thereof

A technology of porous carbon materials and supercapacitors, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems that capacitors cannot meet the use environment, and achieve the effects of convenient synthesis method, high power and simple process.

Inactive Publication Date: 2018-05-22
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, capacitors only have the characteristics of high specific energy, which is far from meeting the increasingly complex use environment.

Method used

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  • Composite porous carbon material and preparation method of high-power supercapacitor thereof
  • Composite porous carbon material and preparation method of high-power supercapacitor thereof
  • Composite porous carbon material and preparation method of high-power supercapacitor thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Ingredients: The raw materials are weighed according to the composition and parts by weight of the composite porous carbon material, including 30 parts of graphene oxide, 30 parts of sulfonated pitch, and 60 parts of potassium hydroxide, wherein potassium hydroxide is prepared into an aqueous solution when used.

[0037] Carbon material preparation: first mix potassium hydroxide with ultrapure water to form a potassium hydroxide aqueous solution with a mass fraction of 20%, and then dissolve sulfonated pitch and graphene oxide with a mass ratio of 1:1 in the potassium hydroxide aqueous solution at the same time, Graphene oxide / sulfonated pitch-KOH aqueous solution is obtained, wherein the mass ratio of potassium hydroxide to the total amount of graphene oxide and sulfonated pitch is 3:1.

[0038] Carbonization: Put the graphene oxide / sulfonated pitch-KOH aqueous solution in a drying box, adjust the drying temperature to 90°C, and the drying time to 3h. After drying, the ...

Embodiment 2

[0042] Ingredients: The raw materials are weighed according to the composition and parts by weight of the composite porous carbon material, including 30 parts of graphene oxide, 30 parts of sulfonated pitch, and 60 parts of potassium hydroxide, wherein potassium hydroxide is prepared into an aqueous solution when used.

[0043] Carbon material preparation: first mix potassium hydroxide with ultrapure water to form an aqueous potassium hydroxide solution with a mass fraction of 8%, and then simultaneously dissolve sulfonated pitch and graphene oxide with a mass ratio of 8:1 in the aqueous potassium hydroxide solution. Obtain graphene oxide / sulfonated pitch-KOH aqueous solution, wherein the mass ratio of potassium hydroxide to the total amount of graphene oxide and sulfonated pitch is 2:1.

[0044] Carbonization: Put the graphene oxide / sulfonated pitch-KOH aqueous solution in a drying box, adjust the drying temperature to 90°C, and the drying time to 3h. After drying, the graphen...

Embodiment 3

[0048] Ingredients: The raw materials are weighed according to the composition and parts by weight of the composite porous carbon material, including 30 parts of graphene oxide, 30 parts of sulfonated pitch, and 60 parts of potassium hydroxide, wherein potassium hydroxide is prepared into an aqueous solution when used.

[0049] Carbon material preparation: first mix potassium hydroxide with ultrapure water to form a potassium hydroxide aqueous solution with a mass fraction of 30%, and then dissolve sulfonated pitch and graphene oxide with a mass ratio of 5:1 in the potassium hydroxide aqueous solution at the same time, Graphene oxide / sulfonated pitch-KOH aqueous solution is obtained, wherein the mass ratio of potassium hydroxide to the total amount of graphene oxide and sulfonated pitch is 5:1.

[0050] Carbonization: Put the graphene oxide / sulfonated pitch-KOH aqueous solution in a drying box, adjust the drying temperature to 90°C, and the drying time to 3h. After drying, the ...

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Abstract

The invention belongs to the technical field of supercapacitors, and particularly relates to a composite porous carbon material and a preparation method of a high-power supercapacitor thereof. The composite porous carbon material comprises the following constituents based on parts by weight: 10-50 parts of graphene oxide, 10-50 parts of sulphonated asphalt and 20-100 parts of potassium hydroxide,wherein the graphene oxide is a product after chemical oxidization and stripping of graphite powder, contains relatively rich oxygen-containing functional groups and is easy to modify, the sulphonatedasphalt has high carbon content and high hydrophilcity, and thus, an asphalt-based porous carbon material with high specific area and high density is easily prepared by alkali activation and etching.A compound is simply dried by a processing preparation method, and the composite porous carbon material can be formed after heating; and moreover, the composite porous carbon material is high in density and large in specific area, and thus, the prepared supercapacitor is high in specific capacity and large in power.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a composite porous carbon material and a preparation method for high-power supercapacitors thereof. Background technique [0002] Supercapacitors, also known as electric double layer capacitors or electrochemical capacitors, store energy by polarizing electrolytes. A supercapacitor can be viewed as two non-reactive porous electrode plates suspended in an electrolyte. When electricity is applied to the plates, the positive plate attracts negative ions in the electrolyte, and the negative plate attracts positive ions, effectively forming two capacitive storage The separated positive ions are near the negative plate, and the negative ions are near the positive plate. The supercapacitor stores energy by forming an electric double layer structure of electrolyte ions on the electrode surface. Since the supercapacitor does not undergo electrochemical reactions durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/34H01G11/86
CPCH01G11/34H01G11/86Y02E60/13
Inventor 乔志军阮殿波于学文裘剑佩
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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