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Nitrogen element self-doped tobacco stem-based activated carbon electrode material as well as preparation method and application thereof

A technology based on activated carbon and electrode material, which is applied in the field of self-doped nitrogen-based tobacco rod-based activated carbon electrode material and its preparation field, can solve the problems of low nitrogen content, lack of availability, affecting the performance of supercapacitors, etc. Capacitance, increase energy density, enhance the effect of added economic value

Active Publication Date: 2021-03-09
CROP RES INST GUANGDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nitrogen is an essential element for the growth of tobacco leaves. However, the inventors found in the research that during the tobacco planting process, the nitrogen content in the tobacco stalks was less, and the activated carbon electrode materials were prepared from tobacco stalks without doping. Activated carbon electrode materials with high nitrogen elements, as electrode materials for supercapacitors, will affect the performance of supercapacitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Plant flue-cured tobacco;

[0035] (2) Take tobacco stalks, grind the tobacco stalks into 200 meshes to obtain tobacco stalk powder, then put the tobacco stalk powder in an oven and keep it warm for 24 hours at 70°C for drying;

[0036] (3) Put the dried tobacco stalk powder into the tube furnace under nitrogen atmosphere (flow rate is 3mL·min -1 ), at 5°C·min -1 The speed was increased to 550°C for 2 hours, and pyrolysis treatment was carried out; after heat treatment, the furnace was lowered to room temperature and then taken out to obtain the precursor of tobacco stalk carbon powder;

[0037] (4) Mix the tobacco stalk carbon powder precursor with KOH, add water for further grinding and kneading, and then put it in a vacuum drying oven at 70°C for 12 hours to obtain a tobacco stalk carbon powder / KOH mixture;

[0038] (5) Then put the tobacco stalk carbon powder / KOH mixture into the tube furnace under nitrogen atmosphere (flow rate is 3mL·min -1 ), at 5°C·min -...

Embodiment 2

[0043] (1) Plant flue-cured tobacco;

[0044] (2) Take tobacco stalks, crush the tobacco stalks into 100 meshes to obtain tobacco stalk powder, then put the tobacco stalk powder in an oven and keep it warm for 24 hours at 70°C for drying;

[0045] (3) Put the dried tobacco stalk powder into the tube furnace under nitrogen atmosphere (flow rate is 3mL·min -1 ), at 3°C·min -1 The speed was raised to 500°C for 3 hours, and pyrolysis treatment was carried out; after the heat treatment, the furnace was lowered to room temperature and then taken out to obtain the tobacco stalk carbon powder precursor;

[0046] (4) Mix the tobacco stalk carbon powder precursor with KOH, add water for further grinding and kneading, and then put it in a vacuum drying oven at 70°C for 12 hours to obtain a tobacco stalk carbon powder / KOH mixture;

[0047] (5) Then put the tobacco stalk carbon powder / KOH mixture into the tube furnace under nitrogen atmosphere (flow rate is 3mL·min -1 ), at 3°C·min -1 ...

Embodiment 3

[0052] (1) Plant flue-cured tobacco;

[0053] (2) Take tobacco stalks, crush the tobacco stalks into 50 meshes to obtain tobacco stalk powder, then put the tobacco stalk powder in an oven and keep it warm for 24 hours at 70°C for drying;

[0054] (3) Put the dried tobacco stalk powder into the tube furnace under nitrogen atmosphere (flow rate is 3mL·min -1 ), at 6°C·min -1 The speed was raised to 600°C for 1.5 hours, and pyrolysis treatment was carried out; after the heat treatment, the furnace was lowered to room temperature and then taken out to obtain the tobacco stalk carbon powder precursor;

[0055] (4) Mix the tobacco stalk carbon powder precursor with KOH, add water for further grinding and kneading, and then put it in a vacuum drying oven at 70°C for 12 hours to obtain a tobacco stalk carbon powder / KOH mixture;

[0056] (5) Then put the tobacco stalk carbon powder / KOH mixture into the tube furnace under nitrogen atmosphere (flow rate is 3mL·min -1 ), at 6°C·min -1...

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Abstract

The invention relates to the technical field of electrode material preparation and particularly discloses a nitrogen element self-doped tobacco stem-based activated carbon electrode material and a preparation method and application thereof. The preparation method of the nitrogen element self-doped tobacco stem-based activated carbon electrode material comprises the following steps of (1) plantingflue-cured tobacco; (2) taking tobacco straw, crushing the tobacco straw to obtain tobacco straw powder, and then drying the tobacco straw powder; (3) carrying out pyrolysis treatment on the dried tobacco stem powder in a nitrogen atmosphere to obtain a tobacco stem carbon powder precursor; (4) mixing the tobacco stem carbon powder precursor with KOH, adding water for further grinding and kneading, and drying to obtain a tobacco stem carbon powder / KOH mixture; and (5) carrying out pyrolysis treatment on the tobacco stem carbon powder / KOH mixture to obtain the tobacco stem-based activated carbon electrode material self-doped with the nitrogen element. When the cigarette-stem-based activated carbon electrode material is used for preparing a supercapacitor, the specific capacitance of the supercapacitor can be improved, and the energy density can be increased.

Description

technical field [0001] The invention relates to the technical field of preparation of electrode materials, in particular to a self-doped nitrogen-doped tobacco rod-based activated carbon electrode material and a preparation method and application thereof. Background technique [0002] Tobacco stalks are tobacco stalks, and a large amount of tobacco stalks are produced every year after the tobacco leaves are harvested; currently, tobacco stalks are mainly incinerated and discarded. However, burning and discarding tobacco stalks will cause some pollution to the atmosphere and the environment; therefore, it is necessary to develop a method for recycling tobacco stalks. [0003] In order to reduce environmental pollution, improve the utilization rate of tobacco stalks, and increase the economic value of tobacco planting, the preparation of activated carbon electrode materials from tobacco stalks is one of the utilization methods of tobacco stalks. Activated carbon electrode mat...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/86
CPCH01G11/32H01G11/86Y02E60/13
Inventor 袁清华马柱文陈桢禄魏彬陈俊标黄振瑞
Owner CROP RES INST GUANGDONG ACAD OF AGRI SCI
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