A carbon cloth/gallium oxynitride supercapacitor electrode material and preparation method thereof

A supercapacitor and oxynitride technology, applied in the field of electrochemical energy storage, can solve the problems of low conductivity and affecting the rate performance, and achieve the effect of high area specific capacity and good rate performance

Active Publication Date: 2022-04-29
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 its rate performance

Method used

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  • A carbon cloth/gallium oxynitride supercapacitor electrode material and preparation method thereof
  • A carbon cloth/gallium oxynitride supercapacitor electrode material and preparation method thereof
  • A carbon cloth/gallium oxynitride supercapacitor electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A carbon cloth / gallium oxynitride supercapacitor electrode material and a preparation method thereof, the steps are as follows:

[0044] (1) arrange the carbon in 6mol L -1 Nitric acid solution, sonicate at room temperature for 2 h, and dry.

[0045] (2) Cut the carbon cloth into a rectangular strip of 1cm×4cm, and 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.

[0046] (3) Place 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.

[0047] (4) Programmed heating, the heating rate is 10°C min -1 , when ...

Embodiment 2

[0050] 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

[0052] 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.

[0053] Result analysis

[0054] 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), and (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.

[0055] 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 nitridi...

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Abstract

The invention belongs to the technical field of electrochemical energy storage, and relates to a supercapacitor electrode material and a preparation method thereof, comprising the following steps: 1) surface-treating carbon cloth to obtain carbon cloth A; 2) placing carbon cloth A in trichloro Gallium chloride-benzene solution, repeated immersion and pulling several times to obtain carbon cloth B, then placed carbon cloth B in a fume hood, placed in ambient air at room temperature for 6-12h, obtained carbon cloth C, and then carbon cloth B C is placed in an oven and dried at 50-70°C for 6-12h to obtain carbon cloth D; 3) carbon cloth D is placed in a tube furnace and nitrided in an ammonia atmosphere to obtain carbon cloth / gallium oxynitride . The invention also provides the carbon cloth / gallium oxynitride prepared by the method and its application. The preparation method of the carbon cloth / gallium oxynitride composite material of the present invention can realize effective control of the band structure, N / O ratio and particle size by changing the nitriding temperature; the obtained carbon cloth / gallium oxynitride has Excellent electrochemical performance.

Description

technical field [0001] The invention relates to a supercapacitor electrode material and a preparation method thereof, belonging to the technical field of electrochemical energy storage. Background technique [0002] Gallium oxynitride is widely used in water splitting, nitrogen oxide decomposition and gas sensing (Adv. Mater. Interfaces2019, 6, 1900659; Nanoscale2018, 10, 1837-1844; Adv. Mater. ; Sens. Actuators B2006, 115, 4-11). The structure, composition and morphology of gallium oxynitride are closely related to its preparation method. So far, researchers have developed a variety of preparation methods for gallium oxynitride, including solvothermal method (Nano Energy2018, 44, 23-33), plasma-assisted atomic layer deposition (NanoEnergy2019, 66, 104089), magnetic Controlled sputtering method (J.Solid State Chem.2020,282,121066), chemical vapor deposition method (Energy Environ.Sci.2014,7,1693–1699), high temperature and high pressure method (Chem.Mater.2009,21,2101 -21...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/40
CPCH01G11/86H01G11/24H01G11/30H01G11/40Y02E60/13
Inventor 盖利刚王家钰姜海辉刘利彬班青
Owner QILU UNIV OF TECH
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