Carbon nitride/cobalt sulfide super capacitor electrode material, preparation method thereof, and application thereof

A technology for supercapacitors and electrode materials, applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc.

Inactive Publication Date: 2017-02-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, no one-step synthesis method has been found to prepare g-C 3 N 4 / CoS supercapacitor electrode material report, the CoS used is stable in chemical and physical properties, the raw materials are cheap and easy to obtain,

Method used

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  • Carbon nitride/cobalt sulfide super capacitor electrode material, preparation method thereof, and application thereof
  • Carbon nitride/cobalt sulfide super capacitor electrode material, preparation method thereof, and application thereof
  • Carbon nitride/cobalt sulfide super capacitor electrode material, preparation method thereof, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: g-C 3 N 4 Preparation of nanosheets:

[0030] Weigh 10 g of urea into a semi-closed crucible, dry it first, then transfer it to a temperature-programmed tube furnace for calcination, set the heating rate at 2.3°C / min, and calcine at 550°C for 5h. After cooling down to room temperature naturally, take it out, grind it into powder with a mortar, and use 0.1mol / L dilute HNO 3 Wash several times to remove residual alkaline species, then wash the product with distilled water and absolute ethanol, centrifuge, and dry to obtain g-C 3 N 4 Nanosheets.

Embodiment 2

[0031] Example 2: 15% g-C 3 N 4 Preparation of / CoS composite nanomaterials:

[0032] 15% g-C 3 N 4 / CoS composite nanomaterials were synthesized using a one-step hydrothermal method: weigh 0.8mmol of CoCl 2 ·H 2 0 and 1.6mmol of thiourea in a 100mL beaker, add 36mL of absolute ethanol, magnetically stirred for 30min to completely dissolve it, then add 0.0128g of g-C obtained in Example 1 3 N 4 , ultrasonic for 30min, wait for g-C 3 N 4 After dispersing evenly, add 4mL of ethylenediamine and stir for another 10min, then add the resulting solution into a 50mL polytetrafluoroethylene-lined reaction kettle, put it in an oven, and react with solvent heat at 180°C for 12h, and wait to cool to room temperature after the reaction Afterwards, the precipitate was centrifuged, washed with water and alcohol three times each, dried in an oven and ground to obtain 15% g-C 3 N 4 / CoS composite nanomaterials.

Embodiment 3

[0033] Example 3: 35% g-C 3 N 4 Preparation of / CoS composite nanomaterials:

[0034] 35% g-C 3 N 4 / CoS composite nanomaterials were synthesized using a one-step hydrothermal method: weigh 0.8mmol of CoCl 2 ·H 2 O and 1.6mmol of thiourea were placed in a 100mL beaker, 36mL of absolute ethanol was added, and after magnetic stirring for 30min to completely dissolve it, 0.0392g of the g-C obtained in Example 1 was added. 3 N 4 , ultrasonic for 30min, wait for g-C 3 N 4 After dispersing evenly, add 4mL of ethylenediamine and stir for another 10min, then add the resulting solution into a 50mL polytetrafluoroethylene-lined reaction kettle, put it in an oven, and react with solvent heat at 180°C for 12h, and wait to cool to room temperature after the reaction Afterwards, the precipitate was centrifuged and washed three times with water and alcohol, and then dried in an oven and ground to obtain 35% g-C 3 N 4 / CoS composite nanomaterials.

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Abstract

The invention belongs to the technical field of the preparation of super capacitor materials, relating to a preparation method of a carbon nitride/cobalt sulfide two-dimensional sheet composite structure super capacitor electrode material. CoCl2-H2O and thiourea are weighed and placed in the beaker, anhydrous ethanol is added into the beaker, the magnetic stirring is carried out until complete dissolution, g-C3N4 is added, the ultrasonic processing is carried out until g-C3N4 is dispersed evenly, then ethylenediamine is added, an obtained dispersion solution is added into the reaction kettle of teflon, and the hydrothermal reaction is carried out. After natural cooling to a room temperature, the centrifugation, water washing and alcohol washing are carried out for many times, and after drying, a g-C3N4/CoS sample is obtained through grinding. The used CoS has stable chemical and physical properties, the original material is cheap and easy to obtain and is non-toxic, the reaction process of preparing the g-C3N4/CoS composite material is simple, the product production process is green and environment-friendly, and the capacitive property is excellent.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor materials, and relates to a preparation method of a carbon nitride / cobalt sulfide two-dimensional sheet-sheet composite structure supercapacitor electrode material, in particular, a preparation process is simple, has good capacitance performance and excellent Preparation method of composite materials with galvanostatic charge-discharge stability. Background technique [0002] With the increasing demand for electronic devices and power tools, the development of electrode materials for high-performance energy storage devices has attracted increasing attention. As a new type of energy storage device, supercapacitor has the characteristics and advantages of fast charging and discharging, green and pollution-free, and long cycle life. It can replace traditional batteries in some fields and become a new type of green energy in the new century. Its application has attracted worldwid...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/86
CPCY02E60/13H01G11/30H01G11/86
Inventor 陈敏徐箐姜德立朱永刚王天勇邵乐强
Owner JIANGSU UNIV
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