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Working electrode based on carbon cloth/gallium oxynitride and supercapacitor

A supercapacitor and oxynitride technology, which is applied in the field of electrochemical energy storage, can solve the problems of low conductivity and affect the rate performance of supercapacitors, and achieve excellent rate performance, excellent electrochemical cycle stability, and good rate performance. Effect

Active Publication Date: 2021-02-02
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although gallium oxynitride is a semiconductor material, its conductivity is not high, which will affect the rate performance of supercapacitors based on gallium oxynitride

Method used

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  • Working electrode based on carbon cloth/gallium oxynitride and supercapacitor
  • Working electrode based on carbon cloth/gallium oxynitride and supercapacitor
  • Working electrode based on carbon cloth/gallium oxynitride and supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A carbon cloth / gallium oxynitride and a preparation method thereof, the steps are as follows:

[0055] (1) arrange the carbon in 6mol L -1 Nitric acid solution, sonicate at room temperature for 2 h, and dry.

[0056] (2) Cut the carbon cloth into a rectangular strip of 1cm×4cm, place the carbon cloth strip in 1mol L -1 The gallium trichloride-benzene solution was dipped and pulled 12 times, and the time interval between two adjacent dips and pulled was 5 minutes.

[0057] (3) Arrange the impregnated and pulled carbon in a fume hood, place it in ambient air at room temperature for 12 hours, then place the carbon in a 60°C oven to dry for 6 hours, then place the carbon in a tube furnace, and turn on the ammonia gas bottle, the ammonia flow rate was set at 48mL min -1 , Ammonia gas enters the tube furnace after passing through 25-28% concentrated ammonia water.

[0058] (4) Programmed heating, the heating rate is 10°C min -1 , when the temperature reaches 750°C, keep ...

Embodiment 2

[0061] Change the 750°C in step (4) of Example 1 to 800°C, and keep the rest of the conditions unchanged. The obtained carbon cloth / gallium oxynitride is denoted as S2.

Embodiment 3

[0063] Change the 750°C in step (4) of Example 1 to 850°C, and keep the rest of the conditions unchanged. The obtained carbon cloth / gallium oxynitride is denoted as S3.

[0064] Result analysis

[0065] figure 1 is the XRD pattern of samples S1, S2 and S3. The two weak peaks at 24.2° and 43.6° in the figure come from carbon cloth, and the positions of the remaining diffraction peaks are similar to those of (100), (002), (101), (102), (110), (103) and (112) crystal planes correspond. Compared with S1 and S2, the width of the diffraction peak corresponding to the (100) / (002) / (101) crystal plane in the spectrum of S3 is narrower, and there is obvious splitting. This shows that the increase of nitriding temperature is beneficial to improve the crystallinity of sample particles.

[0066] The structural information of the sample can be obtained by Rietveld fitting. Table 1 gives the unit cell parameters of different samples. It can be seen from Table 1 that as the nitriding ...

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Abstract

The invention belongs to the technical field of electrochemical energy storage, and relates to an electrochemical working electrode, a supercapacitor and preparation methods of the electrochemical working electrode and the supercapacitor. According to the carbon cloth / gallium oxynitride, gallium oxynitride nanoparticles are loaded on carbon cloth fibers; and the sizes of the gallium oxynitride nanoparticles are in a range of 10-70 nm. The supercapacitor is composed of the carbon cloth / gallium oxynitride working electrode, a diaphragm, an electrolyte and an outer package. The carbon cloth / gallium oxynitride working electrode and the symmetric water-system supercapacitor provided by the invention have relatively high area specific capacity, excellent rate capability and electrochemical cyclestability.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage, and relates to an electrochemical working electrode, a supercapacitor and a preparation method thereof, in particular to a carbon cloth / gallium oxynitride-based working electrode, a supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitors are components that store energy through the interfacial double-layer capacitance formed between electrodes and electrolytes. A supercapacitor consists of electrode sheets, electrolyte, diaphragm and outer packaging. When the electrode is in contact with the electrolyte, due to the effects of Coulomb force, intermolecular force, interatomic force and interionic force, a stable and opposite double-layer charge appears at the solid-liquid interface, which is called the interface double-layer charge. A potential applied to the positive plate attracts negative ions in the electrolyte, and the negative pla...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/40H01G11/86
CPCH01G11/24H01G11/30H01G11/40H01G11/86Y02E60/13
Inventor 盖利刚刘利彬王家钰李学林班青
Owner QILU UNIV OF TECH
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