Carbon nitride-graphene composite material as well as preparation method and application thereof

A composite material and graphene technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of small specific surface area and low conductivity, so as to increase specific surface area, increase specific capacity, and increase pseudocapacitance Effect

Active Publication Date: 2021-11-02
哈尔滨万鑫石墨谷科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the problems of small specific surface area and low electrical conductivity when graphitic carbon nitride is used to prepare electrodes for supercapacitors

Method used

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  • Carbon nitride-graphene composite material as well as preparation method and application thereof
  • Carbon nitride-graphene composite material as well as preparation method and application thereof
  • Carbon nitride-graphene composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a carbon nitride-graphene composite material, the preparation method is as follows:

[0047] Step 1: Preparation of sulfur-doped porous honeycomb carbon nitride

[0048] Disperse 1.77g of thiocyanic acid and 3.04g of thiourea in 100mL of distilled water, and mechanically stir for 2h to form a hydrogel-like supramolecular precursor of thiocyanic acid-thiourea. Put the thiocyanic acid-thiourea supramolecular precursor into an oven at 60°C and dry for 24 hours until the thiourea supramolecular precursor becomes a block. The bulk thiocyanic acid-thiourea supramolecular precursor was ground into powder and put into a crucible, and the crucible was placed in a muffle furnace at 600 °C for 1 h, and the heating rate was 5 °C / min. After cooling, the sulfur-doped porous honeycomb carbon nitride was obtained, and its scanning electron microscope picture was as follows: figure 1 shown. Take 0.1 g of the above-mentioned sulfur-doped porous honeycomb carbo...

Embodiment 2

[0052] This embodiment provides a carbon nitride-graphene composite material, the preparation method is as follows:

[0053] Step 1: Preparation of sulfur-doped porous honeycomb carbon nitride

[0054] Disperse 1.77g of thiocyanic acid and 3.42g of thiourea in 100mL of distilled water, and mechanically stir for 2h to form a hydrogel-like supramolecular precursor of thiocyanic acid-thiourea. Put the thiocyanic acid-thiourea supramolecular precursor into an oven at 62°C and dry for 23 hours until the thiocyanic acid-thiourea supramolecular precursor becomes a block. The bulk thiocyanic acid-thiourea supramolecular precursor was ground into powder and put into a crucible, and the crucible was placed in a muffle furnace at 610°C for 0.8h, and the heating rate was 5.5°C / min. After cooling, a sulfur-doped porous honeycomb carbon nitride is obtained. Take 0.12 g of the above-mentioned sulfur-doped porous honeycomb carbon nitride and disperse it in 100 mL of distilled water to prepa...

Embodiment 3

[0058] This embodiment provides a carbon nitride-graphene composite material, the preparation method is as follows:

[0059] Step 1: Preparation of sulfur-doped porous honeycomb carbon nitride

[0060] Disperse 1.77g of thiocyanic acid and 2.66g of thiourea in 100mL of distilled water, and mechanically stir for 2h to form a hydrogel-like supramolecular precursor of thiocyanic acid-thiourea. Put the thiocyanic acid-thiourea supramolecular precursor into an oven at 58°C and dry for 25 hours until the thiourea supramolecular precursor turns into block. The bulk thiocyanic acid-thiourea supramolecular precursor was ground into powder and put into a crucible, and the crucible was placed in a muffle furnace at 590°C for 1.2h, and the heating rate was 4.5°C / min. After cooling, a sulfur-doped porous honeycomb carbon nitride is obtained. Take 0.08 g of the above-mentioned sulfur-doped porous honeycomb carbon nitride and disperse it in 100 mL of distilled water, and configure it into ...

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Abstract

The invention provides a carbon nitride-graphene composite material as well as a preparation method and application thereof. The preparation method of the carbon nitride-graphene composite material comprises the following steps: (1) mixing and stirring trithiocyanuric acid, thiourea and water, then conducting drying to obtain a block, crushing the block, carrying out heating and preserving heat to obtain sulfur-doped porous honeycomb carbon nitride; and (2) dispersing the sulfur-doped porous honeycomb carbon nitride obtained in the step (1) to obtain a carbon nitride solution, and mixing and stirring the carbon nitride solution with a graphene-HCl dispersion liquid to obtain the carbon nitride-graphene composite material. The carbon nitride-graphene composite material provided by the invention is high in specific capacity, high in surface reaction activity and strong in conductivity.

Description

technical field [0001] The invention belongs to the field of electrode materials, in particular to a carbon nitride-graphene composite material and its preparation method and application, in particular to a carbon nitride-graphene composite material with high specific capacity and its preparation method and application. Background technique [0002] In order to cope with the increasingly serious environmental problems and reduce the environmental pollution caused by traditional fossil energy, electrochemical energy storage has become an important demand for the development of the world today. Electrochemical energy is rich, clean, and renewable. To make good use of this energy source, there is an urgent need to establish a durable, easy-to-maintain, and inexpensive electrochemical energy storage device. Compared with traditional batteries, supercapacitors have higher power capacity and lower energy density, so they are widely used in portable electronic devices, power backu...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/86
CPCH01G11/32H01G11/86Y02E60/13
Inventor 于平娄明于泽文冯晓彤霍美婷裴玉婷
Owner 哈尔滨万鑫石墨谷科技有限公司
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