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Metal oxide-loaded porous carbon electrode material and preparation method thereof

A porous carbon electrode and metal-loaded technology, which is applied in chemical instruments and methods, carbon compounds, non-metallic elements, etc., can solve the problems of low energy density of activated carbon-based supercapacitors, affect the performance of electrode materials, and difficult to uniformly load, etc., to achieve stability Cycle performance, increase storage, improve energy storage effect

Active Publication Date: 2021-06-01
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the specific surface area of ​​the activated carbon material used is not high, the specific capacitance it can contribute is extremely limited, making the energy density of activated carbon-based supercapacitors low
In addition, the surface modification of general activated carbon materials is difficult to achieve uniform loading, and it is easy to agglomerate, which greatly affects the performance of electrode materials.

Method used

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  • Metal oxide-loaded porous carbon electrode material and preparation method thereof
  • Metal oxide-loaded porous carbon electrode material and preparation method thereof
  • Metal oxide-loaded porous carbon electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A. Put 8g of activated carbon powder in hydrochloric acid solution with 10% volume concentration, the mass volume ratio of activated carbon to hydrochloric acid solution kg / L is 1:200; heat and reflux at 25-50°C for 5h, and filter the precipitate obtained by suction drying;

[0030] B. Wash the material obtained in step A with deionized water at 25°C for 12 hours with stirring and water, and the mass volume ratio kg / L of material to deionized water is 1:500; dry the precipitate obtained by suction filtration, and repeat 3 times to obtain Activated carbon material;

[0031] C, the activated carbon material obtained in step B is placed in a suction filter bottle, and the 0.03M FeCl 3 10ml of aqueous solution was slowly dripped into the suction filter flask under vacuum and kept shaking to obtain a paste state mixture, then ultrasonically impregnated at 60°C for 1h, then dried under vacuum at 120°C for 5h, and finally dried in a tube furnace The temperature was raised to...

Embodiment 2

[0034] A. Put 8g of activated carbon powder in hydrochloric acid solution with 10% volume concentration, the mass volume ratio of activated carbon to hydrochloric acid solution kg / L is 1:200; heat and reflux at 25-50°C for 5h, and filter the precipitate obtained by suction drying;

[0035] B. Wash the material obtained in step A with deionized water at 25°C for 12 hours with stirring and water, and the mass volume ratio kg / L of material to deionized water is 1:500; dry the precipitate obtained by suction filtration, and repeat 3 times to obtain Activated carbon material;

[0036] C, the activated carbon material obtained in step B is placed in a suction filter bottle, and the 0.05M FeCl 3 10ml of aqueous solution was slowly dripped into the suction filter flask under vacuum and kept shaking to obtain a paste state mixture, then ultrasonically impregnated at 60°C for 1h, then dried under vacuum at 120°C for 5h, and finally dried in a tube furnace The temperature was raised to...

Embodiment 3

[0039] A. Put 8g of activated carbon powder in hydrochloric acid solution with 10% volume concentration, the mass volume ratio of activated carbon to hydrochloric acid solution kg / L is 1:200; heat and reflux at 25-50°C for 5h, and filter the precipitate obtained by suction drying;

[0040]B. Wash the material obtained in step A with deionized water at 25°C for 12 hours with stirring and water, and the mass volume ratio kg / L of material to deionized water is 1:500; dry the precipitate obtained by suction filtration, and repeat 3 times to obtain Activated carbon material;

[0041] C, the activated carbon material obtained in step B is placed in a suction filter bottle, and the 0.1M FeCl 3 10ml of aqueous solution was slowly dripped into the suction filter flask under vacuum and kept shaking to obtain a paste state mixture, then ultrasonically impregnated at 60°C for 1h, then dried under vacuum at 120°C for 5h, and finally dried in a tube furnace The temperature was raised to 4...

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Abstract

The invention provides a metal oxide-loaded porous carbon electrode material and a preparation method thereof. The preparation method comprises the following steps: A, placing active carbon powder in a hydrochloric acid solution with a volume concentration of 8-10%, carrying out heating reflux for 4-6 h, and drying a precipitate obtained by suction filtration; B, stirring the material obtained in step A with deionized water, washing with water, and drying the precipitate obtained by suction filtration to obtain an activated carbon material; and C, putting the activated carbon material obtained in step B into a container, carrying out metal ion modification by adopting a vacuum oscillation equivalent-volume impregnation method, dropwise adding 0.03-0.1 mol / L FeCl3 aqueous solution in a vacuumized state by utilizing a burette and keeping oscillation to obtain a paste-state mixture, carrying out ultrasonic treatment at 25-60 DEG C for 1-3 hours, then drying at 110-120 DEG C in a vacuum state for 5-8 hours, finally, raising the temperature in a tubular furnace to 400-450 DEG C, and sintering for 2-4 hours in an inert atmosphere to obtain the target material. According to the electrode prepared by the invention, the energy storage of a supercapacitor is improved under the condition that the original active carbon surface structure is not changed basically.

Description

technical field [0001] The invention relates to the field of preparation of supercapacitor electrode materials, in particular to a porous carbon electrode material loaded with metal oxides and a preparation method thereof. Background technique [0002] The energy storage of traditional activated carbon-based supercapacitors is mostly limited by the electric double layer theory. According to the electric double layer theory, the specific capacity of activated carbon materials is proportional to its specific surface area, that is, the larger the specific surface area, the greater the specific capacity. When the specific surface area of ​​the activated carbon material used is not high, the specific capacitance it can contribute is extremely limited, making the energy density of activated carbon-based supercapacitors low. In addition, the surface modification of general activated carbon materials is difficult to achieve uniform loading, and agglomeration is easy to occur, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/26H01G11/32H01G11/46C01B32/354
CPCH01G11/86H01G11/24H01G11/26H01G11/32H01G11/46C01B32/354Y02E60/13
Inventor 陈永杜玉婷
Owner HAINAN UNIVERSITY
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