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Nitrogen-containing carbon material for supercapacitor as well as preparation method and application thereof

A technology for supercapacitors and electrode materials, applied in chemical instruments and methods, hybrid capacitor electrodes, inorganic chemistry, etc., can solve the problems of high production cost and small specific surface area, and achieve the effect of increasing the degree of heterocycles and improving the pore structure

Active Publication Date: 2020-07-17
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method disclosed in the present invention solves the problem of high production cost of nitrogen-containing carbon materials for supercapacitors at present, and the nitrogen-containing carbon materials for supercapacitors prepared by the preparation method avoids the small specific surface area of ​​current carbon materials It has high practical value in the field of preparation of nitrogen-containing carbon materials for supercapacitors, as well as the preparation and application of nitrogen-containing carbon electrode materials for supercapacitors

Method used

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  • Nitrogen-containing carbon material for supercapacitor as well as preparation method and application thereof
  • Nitrogen-containing carbon material for supercapacitor as well as preparation method and application thereof
  • Nitrogen-containing carbon material for supercapacitor as well as preparation method and application thereof

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Effect test

Embodiment 1

[0043] 1.1 Preparation of nitrogen-containing carbon materials for supercapacitors

[0044] 1) Preparation of the filtrate: add 6.6g of domestic sludge with a water content of 80% to 20mL of deionized water, and at the same time add 0.26g of solid sodium hydroxide, react in a 100mL hydrothermal reactor at 180°C for 1 hour, and separate the solid and liquid to obtain the filtrate; 2) Preparation of nitrogen-containing carbon products: In a hydrothermal reaction kettle, add 20mL of filtrate and 2g of cellulose at the same time, carry out hydrothermal reaction at 180°C, and the reaction time is 1h; after the reaction set time, further increase the temperature to continue the reaction , the reaction temperature is 280°C, and the reaction is 1h. After the reaction, the hydrothermal reaction product is suction-filtered, washed with deionized water, suction-filtered, ethanol-washed, and suction-filtered, and the treated product is vacuum-dried at 120°C for 12 hours to obtain a solid ...

Embodiment 2

[0049] 2.1 Preparation of nitrogen-containing carbon materials for supercapacitors

[0050] 1) Preparation of the filtrate: add 20 g of domestic sludge with a water content of 80% to 20 mL of deionized water, and at the same time add 1 mL of 0.1 mol / L hydrochloric acid solution, react in a 100 mL hydrothermal reactor at 230 ° C for 2 h, and separate the solid and liquid to obtain the filtrate; 2) Preparation of nitrogen-containing carbon products: In a hydrothermal reaction kettle, add 20mL of filtrate and 4.0g of cellulose at the same time, carry out hydrothermal reaction at 240°C, and the reaction time is 2h; after the reaction set time, further increase the temperature and continue Reaction, the reaction temperature is 320°C, and the reaction is 3h. After the reaction, the hydrothermal reaction product is suction-filtered, washed with deionized water, suction-filtered, ethanol-washed, and suction-filtered, and the treated product is vacuum-dried at 120°C for 12 hours to obt...

Embodiment 3

[0055] 3.1 Preparation of nitrogen-containing carbon materials for supercapacitors

[0056] 1) Preparation of the filtrate: Add 40 g of domestic sludge with a water content of 80% to 20 mL of deionized water, and at the same time add 1 mL of 0.1 mol / L phosphoric acid solution, react in a 100 mL hydrothermal reactor at 260 ° C for 2 h, and separate the solid and liquid to obtain the filtrate; 2) Preparation of nitrogen-containing carbon products: In a hydrothermal reaction kettle, add 20mL of filtrate and 8.0g of cellulose at the same time, carry out hydrothermal reaction at 230°C, and the reaction time is 2h; after the reaction set time, further increase the temperature and continue Reaction, the reaction temperature is 240°C, and the reaction is 3h. After the reaction, the hydrothermal reaction product is suction-filtered, washed with deionized water, suction-filtered, ethanol-washed, and suction-filtered, and the treated product is vacuum-dried at 120°C for 12 hours to obtai...

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Abstract

The invention discloses a nitrogen-containing carbon material for a supercapacitor as well as a preparation method and application thereof, and belongs to the technical field of supercapacitor material preparation. The preparation method comprises the following steps: carrying out hydrothermal reaction on filtrate obtained by reacting domestic sludge with a co-reaction substance and ash-free biomass twice to obtain a solid nitrogen-containing carbon product, and reacting the nitrogen-containing carbon product with an activator in an inert atmosphere to obtain a nitrogen-containing carbon activated product; and carrying out certain pretreatment on the nitrogen-containing carbon activation product to obtain the nitrogen-containing carbon material. The nitrogen-containing carbon material forthe supercapacitor prepared by the preparation method has the characteristics of large specific surface area and high specific capacitance. The invention further discloses application of the nitrogen-containing carbon material for the supercapacitor in preparation of supercapacitor electrode materials. The supercapacitor electrode is prepared by mixing a nitrogen-containing carbon material for a supercapacitor, conductive acetylene black and a PVDF binder and tabletting. The supercapacitor electrode material prepared by the method has excellent rate capability and cycling stability.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor materials, and relates to a nitrogen-containing carbon material for supercapacitors and a preparation method and application thereof. Background technique [0002] With the rapid development of the economy, energy and environmental problems are becoming more and more serious, so finding efficient and environmentally friendly energy storage materials has become a top priority. As a new type of energy storage device, supercapacitors have attracted the attention of industry and academia in recent years due to their advantages such as high power density, long cycle life, high charging efficiency and environmental friendliness. Supercapacitors, also known as electrochemical capacitors, can be widely used in backup power supplies, portable mobile power supplies, hybrid electric vehicle power supplies, and other fields, and have good application prospects. A supercapacitor consists...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/318C01B32/348C01B32/354H01G11/30H01G11/24H01G11/44H01G11/34
CPCC01B32/324C01B32/318C01B32/348C01B32/354H01G11/30H01G11/24H01G11/44H01G11/34Y02E60/13
Inventor 段培高桑桂·奥瑞楼·迪安加
Owner XI AN JIAOTONG UNIV
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