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A kind of corn cob derived activated carbon electrode material and preparation method thereof

An electrode material, corncob technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve serious problems such as ammonia environmental pollution, and achieve high specific capacity, low cost, and easily controllable conditions.

Inactive Publication Date: 2021-03-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation process of the porous activated carbon material is simple, the highly corrosive ammonia gas causes serious environmental pollution.

Method used

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  • A kind of corn cob derived activated carbon electrode material and preparation method thereof
  • A kind of corn cob derived activated carbon electrode material and preparation method thereof
  • A kind of corn cob derived activated carbon electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Soak corncobs in 25% potassium hydroxide solution, the ratio of corncobs to potassium hydroxide is 1:3, fully soaked and dried, then calcined at 800 °C for 2 h, and then the obtained product was washed with dilute hydrochloric acid Wash with deionized water until the pH value of the solution is 7, and dry the obtained precipitate at 70° C. for 12 hours to obtain the first activated product.

[0030] The product activated for the first time and potassium hydroxide were fully ground and mixed in a mortar at a ratio of 1:3, and calcined at 800°C for 2 h, and the obtained product was washed with dilute hydrochloric acid and deionized water until the pH value of the solution was was 7, and the resulting precipitate was dried at 70°C for 12 hours to obtain a corncob-derived activated carbon electrode material.

[0031] The pore size distribution of the prepared corncob-derived activated carbon electrode material is as follows: figure 1 shown by figure 1 It can be seen tha...

Embodiment 2

[0035] Soak corncobs in a 15% potassium hydroxide solution, the ratio of corncobs to potassium hydroxide is 1:1, fully soak and dry, and then calcined at 600 °C for 6 h, and then the resulting product is washed with dilute hydrochloric acid Wash with deionized water until the pH value of the solution is 7, and dry the obtained precipitate at 50° C. for 24 hours to obtain the first activated product.

[0036] The product activated for the first time and potassium hydroxide were fully ground and mixed in a mortar at a ratio of 1:0.5, and calcined at 600°C for 6 h, and the obtained product was washed with dilute hydrochloric acid and deionized water until the pH value of the solution was was 7, and the resulting precipitate was dried at 50°C for 24 hours to obtain a corncob-derived activated carbon electrode material.

[0037] In the prepared corncob-derived activated carbon electrode material, the average size of micropores is about 0.1 nm, and the average size of mesopores is a...

Embodiment 3

[0040]Soak corncobs in 50% potassium hydroxide solution, the ratio of corncobs to potassium hydroxide is 1:6, fully soak and dry, and then calcined at 1000 °C for 1 h, and then the obtained product is treated with dilute hydrochloric acid Wash with deionized water until the pH value of the solution is 7, and dry the obtained precipitate at 120° C. for 6 hours to obtain the first activated product.

[0041] The product activated for the first time and potassium hydroxide were fully ground and mixed in a mortar at a ratio of 1:6, and calcined at 1000°C for 1 h, and the obtained product was washed with dilute hydrochloric acid and deionized water until the pH value of the solution was was 7, and the resulting precipitate was dried at 120°C for 6 hours to obtain a corncob-derived activated carbon electrode material.

[0042] In the prepared corncob-derived activated carbon electrode material, the average size of micropores is about 1 nm, and the average size of mesopores is about ...

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Abstract

The invention discloses a corncob-derived activated carbon electrode material and a preparation method thereof. The preparation method includes, soaking agricultural waste corncobs in potassium hydroxide solutions with different concentrations, subjecting the corncobs to high temperature calcination after drying, subjecting obtained products and potassium hydroxide to secondary mixed grinding according to different proportions, and performing high temperature calcination to obtain the corncob-derived hierarchical porous activated carbon material. The corncob-derived hierarchical porous activated carbon material has a double hierarchical structure of micropores and mesopores, and has high specific capacity and rate capacity when serving as a supercapacitor electrode martial. The preparationmethod has the advantages of novelty, simplicity in operation, low manufacture cost and the like.

Description

technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a corn cob-derived hierarchical porous activated carbon supercapacitor electrode material and a preparation method thereof; belonging to the field of new energy materials. Background technique [0002] Biomass carbon materials have attracted extensive attention from researchers as electrode materials for supercapacitors. Commonly used biomass is mainly traditional agricultural and forestry biomass, including various crop straws, wood, fruit shells, fruit stones, rice husks, etc. Among them, agricultural waste biomass-derived carbon materials have the advantages of low cost, environmental friendliness, and developed porous structure, so their use as supercapacitor electrode materials has become a current research hotspot. However, the preparation process of carbon materials derived from agricultural waste biomass is cumbersome, the conditions are harsh, and the spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/348
Inventor 杨树华孙靖韩臻臻曹丙强
Owner UNIV OF JINAN
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