Activated carbon material applied to supercapacitor electrode material

A technology of supercapacitors and electrode materials, applied in hybrid capacitor electrodes, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as low utilization rate of specific surface area, and achieve uniform and controllable pore size, uniform pore size distribution, and less ash.

Inactive Publication Date: 2021-01-08
管小丹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of ash content and uneven pore structure in biomass activated carbon materials, the utilization rate of its specific surface area is relatively low.

Method used

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  • Activated carbon material applied to supercapacitor electrode material
  • Activated carbon material applied to supercapacitor electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] An activated carbon material applied to supercapacitor electrode materials, specifically comprising the steps of:

[0027] S1: Pretreatment methods for cotton stalks include:

[0028] 1) Wash the cotton stalks with distilled water, then dry them at 100°C for 10 hours, and then grind them through a 100-mesh sieve for use in the next step.

[0029] 2) Soak the cotton stalk fragments in step 1) in 5mol / L sodium hydroxide solution for 2h, then filter and wash to neutrality, then soak in 4wt% acetic acid solution for 5h, filter and wash at 100 It was dried at ℃ for 3h and used in the next step.

[0030] 3) Mix and grind the cotton stalk powder and chitosan obtained in step 2), wherein the mass ratio of cotton stalk powder and chitosan is 1:0.14, and then place it in a tube furnace in a nitrogen atmosphere at 500°C Roasting for 5 hours, cooling and grinding through a 160-mesh sieve to obtain cotton straw powder.

[0031] S2: The pretreatment methods of bamboo chips include...

Embodiment 2

[0041]An activated carbon material applied to supercapacitor electrode materials, specifically comprising the steps of:

[0042] S1: Pretreatment methods for cotton stalks include:

[0043] 1) Wash the cotton stalks with distilled water, then dry them at 100°C for 11 hours, and then grind them through a 100-mesh sieve for use in the next step.

[0044] 2) Soak the cotton stalk fragments in step 1) in 5mol / L sodium hydroxide solution for 3h, then filter and wash to neutrality, then soak in 8wt% acetic acid solution for 6h, filter and wash at 100 It was dried at ℃ for 5h and used in the next step.

[0045] 3) Mix and grind the cotton stalk powder and chitosan obtained in step 2), wherein the mass ratio of cotton stalk powder and chitosan is 1:0.17, and then place it in a tube furnace in a nitrogen atmosphere at 520°C Roasting for 8 hours, cooling and grinding through a 160-mesh sieve to obtain cotton straw powder.

[0046] S2: The pretreatment methods of bamboo chips include:...

Embodiment 3

[0056] An activated carbon material applied to supercapacitor electrode materials, specifically comprising the steps of:

[0057] S1: Pretreatment methods for cotton stalks include:

[0058] 1) Wash the cotton stalks with distilled water, then dry them at 100°C for 10 hours, and then grind them through a 100-mesh sieve for use in the next step.

[0059] 2) Soak the minced cotton stalks in step 1) in 5 mol / L sodium hydroxide solution for 2.5 hours, then filter and wash until neutral, then soak in 6 wt% acetic acid solution for 5.5 hours, filter and wash, Dry at 100°C for 4h and prepare for use in the next step.

[0060] 3) Mix and grind the cotton stalk powder and chitosan obtained in step 2), wherein the mass ratio of cotton stalk powder and chitosan is 1:0.15, and then place it in a tube furnace under a nitrogen atmosphere at 510°C Roasting for 6 hours, cooling and grinding through a 160-mesh sieve to obtain cotton straw powder.

[0061] S2: The pretreatment methods of bam...

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Abstract

The invention discloses an activated carbon material applied to a supercapacitor electrode material. The activated carbon material is prepared by pretreating a wood raw material, a seaweed raw material and a crop straw raw material, and performing mixing and carbonizing, wherein bamboo sawdust is selected as the wood raw material, sargassum is selected as the seaweed raw material, and cotton strawis selected as the crop straw raw material; and carbonizing the pretreated bamboo sawdust powder, cotton straw powder and sargassum powder in an oxygen atmosphere, performing chemical activation by using a potassium hydroxide solution and citric acid, mixing with ferric trichloride, grinding, and performing high-temperature calcination activation to obtain the activated carbon material. The activated carbon material has very high specific surface area and porosity, the specific surface area reaches 2563.1 m<2> / g, and when the material is applied to a supercapacitor, the mass specific capacitance reaches 299F / g under the current density of 1A / g. The activated carbon material is a low-cost green electrode material with excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, and in particular relates to an activated carbon material applied to supercapacitor electrode materials. Background technique [0002] Supercapacitors have attracted more and more attention due to their high specific power, excellent cycle charge-discharge capability, and long cycle life, and are considered as an ideal energy storage device to fill portable electronic devices and Growing demand for hybrid vehicles. Supercapacitors have attracted more and more attention due to their high specific power, excellent cycle charge-discharge capability, and long cycle life, and are considered as an ideal energy storage device to fill portable electronic devices and Growing demand for hybrid vehicles. Increasing the specific surface area of ​​carbon materials and improving the pore structure are of great significance for improving the capacitance of supercapacitors. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324C01B32/318H01G11/24H01G11/34H01G11/44
CPCC01B32/318C01B32/324C01B32/348H01G11/24H01G11/34H01G11/44Y02E60/13
Inventor 管小丹
Owner 管小丹
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