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Tobacco stem activated carbon-NiCo2S4 composite electrode material and preparation method thereof

A composite electrode and electrode material technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problem of low specific capacitance of activated carbon materials in tobacco rods, achieve resource reuse, increase specific capacitance, The effect of simple method

Active Publication Date: 2021-04-27
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

Activated carbon electrode materials for tobacco rods can be used as electrode materials for preparing supercapacitors, but the specific capacitance value of pure activated carbon materials for tobacco rods is low, and the specific capacitance value of activated carbon materials must be increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 Tobacco Rod Activated Carbon-NiCo 2 S 4 Preparation of composite electrode materials

[0038] (1) Take tobacco stalks, crush 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;

[0039](2) Put the dried tobacco stalk powder into the tube furnace under the atmosphere of nitrogen (the 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;

[0040] (3) 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; The weight ratio of stalk charcoal powder precursor to KOH is 1:5; the weight r...

Embodiment 2

[0044] Example 2 Tobacco Rod Activated Carbon-NiCo 2 S 4 Preparation of composite electrode materials

[0045] (1) Take tobacco stalks, crush 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;

[0046] (2) Put the dried tobacco stalk powder into the tube furnace under the atmosphere of nitrogen (the 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;

[0047] (3) 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; The weight ratio of stalk charcoal powder precursor to KOH is 1:3; the weight ra...

Embodiment 3

[0051] Example 3 Tobacco Rod Activated Carbon-NiCo 2 S 4 Preparation of composite electrode materials

[0052] (1) Take tobacco stalks, crush 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;

[0053] (2) Put the dried tobacco stalk powder into the tube furnace under the atmosphere of nitrogen (the 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;

[0054] (3) 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; The weight ratio of stalk charcoal powder precursor to KOH is 1:8; the weight ...

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Abstract

The invention relates to the technical field of electrode material preparation, and particularly discloses a tobacco stem activated carbon-NiCo2S4 composite electrode material and a preparation method thereof. The method comprises the following steps: firstly, preparing a tobacco stem-based activated carbon electrode material from tobacco straws, adding the tobacco stem-based activated carbon electrode material into an aqueous solution containing Co(NO3)2.6H2O, Ni(NO3)2.6H2O, hexamethylenetetramine and urea, uniformly stirring, reacting at 160-200 DEG C for 18-30 hours, separating solids to obtain grey blue powder, putting the grey blue powder into a Na2S solution, and reacting for 12-48 hours at a temperature of 100-300 DEG C to obtain the tobacco stem activated carbon-NiCo2S4 composite electrode material. The tobacco stem activated carbon-NiCo2S4 composite electrode material prepared by the method provided by the invention has excellent specific capacitance value and specific capacitance retention rate.

Description

technical field [0001] The invention relates to the technical field of electrode material preparation, in particular to a tobacco rod activated carbon-NiCo 2 S 4 Composite electrode material and its preparation method. 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, increase the utilization rate of tobacco stalks, and increase the economic value of tobacco planting, one of the utilization methods of tobacco stalks is to prepare tobacco rod activated carbon electrode materials from tobacco stalks. The activated carbon electrode material of cigarette rods ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/34H01G11/30H01G11/86
CPCH01G11/34H01G11/30H01G11/86
Inventor 陈俊标马柱文陈桢禄魏彬黄振瑞袁清华
Owner CROP RES INST GUANGDONG ACAD OF AGRI SCI
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