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Green preparation of NiCo2S4@ACF electrode material

An electrode and composite material technology, used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as difficult to degrade pollutants, and achieve the effect of improving performance and overcoming large energy consumption

Inactive Publication Date: 2020-01-14
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many previous studies, NiCo 2 S 4 The vulcanization process usually uses high-temperature hydrothermal or chemical vapor deposition methods, using sulfur powder, sodium sulfur, thiourea, etc. as vulcanizing agents. These methods have strict requirements on experimental conditions, and energy consumption is easy to produce pollutants that are difficult to degrade

Method used

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  • Green preparation of NiCo2S4@ACF electrode material
  • Green preparation of NiCo2S4@ACF electrode material
  • Green preparation of NiCo2S4@ACF electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of NiCo for supercapacitor electrode 2 S 4 The preparation method of @ACF composite material comprises the following steps:

[0018] (1) Evenly distribute the ground ACF, nickel nitrate, and cobalt nitrate in a mixture of absolute ethanol and deionized water, and perform ultrasonic treatment to obtain solution A;

[0019] (2) Dissolving urea in deionized water and stirring for a certain period of time to obtain a homogeneous solution B;

[0020] (3) Slowly add solution A obtained in step (1) to solution B, and continue stirring to obtain a precursor solution;

[0021] (4) Transfer the precursor solution obtained in (3) into a hydrothermal reaction kettle with a suitable volume, heat it in an oven at 100°C, and keep the temperature at a constant temperature for 10 hours. Wash until colorless, and vacuum-dry to obtain a purple-red precursor;

[0022] (5) Put the precursor obtained in (4) in a certain concentration of Na 2 Soak in S solution at room temperature...

Embodiment 2

[0024] A kind of NiCo for supercapacitor electrode 2 S 4 The preparation method of @ACF composite material comprises the following steps:

[0025] (1) Evenly distribute the ground ACF, nickel nitrate, and cobalt nitrate in a mixture of absolute ethanol and deionized water, and perform ultrasonic treatment to obtain solution A;

[0026] (2) Dissolving urea in deionized water and stirring for a certain period of time to obtain a homogeneous solution B;

[0027] (3) Slowly add solution A obtained in step (1) to solution B, and continue stirring to obtain a precursor solution;

[0028] (4) Transfer the precursor liquid obtained in (3) into a hydrothermal reaction kettle with a suitable volume, heat it in an oven at 120°C, and keep the temperature at a constant temperature for 10 hours. Wash until colorless, and vacuum-dry to obtain a purple-red precursor;

[0029] (5) Put the precursor obtained in (4) in a certain concentration of Na 2 Soak in S solution at room temperature f...

Embodiment 3

[0031] A kind of NiCo for supercapacitor electrode 2 S 4 The preparation method of @ACF composite material comprises the following steps:

[0032] (1) Evenly distribute the ground ACF, nickel nitrate, and cobalt nitrate in a mixture of absolute ethanol and deionized water, and perform ultrasonic treatment to obtain solution A;

[0033] (2) Dissolving urea in deionized water and stirring for a certain period of time to obtain a homogeneous solution B;

[0034] (3) Slowly add solution A obtained in step (1) to solution B, and continue stirring to obtain a precursor solution;

[0035] (4) Transfer the precursor solution obtained in (3) into a hydrothermal reaction kettle with a suitable volume, heat it in an oven at 150°C, and keep the temperature constant for 10 hours. Wash until colorless, and vacuum-dry to obtain a purple-red precursor;

[0036] (5) Put the precursor obtained in (4) in a certain concentration of Na 2 In S solution, soak for 12 hours at room temperature, f...

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Abstract

An NiCo2S4@ACF composite material is prepared by soaking a precursor in a high-concentration sodium sulfide solution. The NiCo2S4@ACF composite material applied to a supercapacitor has improved capacitance performance and energy density, which helps to develop an electrode material which has the advantages of high cycle stability and high energy density. The preparation is of great significance for the development and practical application of SC.

Description

technical field [0001] The invention belongs to the field of improving the performance of supercapacitors, and NiCo is prepared by a room temperature vulcanization method. 2 S 4 @ACF electrode material, the vulcanization process is green and environmentally friendly, overcoming the disadvantages of high temperature heating and high energy consumption in the traditional vulcanization process. In addition, the material is expected to further improve the performance of supercapacitor electrodes. Background technique [0002] With the increasing consumption of non-renewable energy, energy depletion and global warming, it is urgent to develop a sustainable and renewable energy storage device. Due to its high power density (about 10-20 times that of batteries), short charging time, long cycle life (about 20-30 times that of batteries), and environmental friendliness, supercapacitors are widely used in electrochemical The field of energy storage has attracted much attention. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/36
CPCH01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 赵世怀杨紫博徐文文张翠翠张蕾温昕
Owner TIANJIN POLYTECHNIC UNIV
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