Preparation method and applications of nitrogen doped carbon particle/graphitized carbon-nitrogen composite material

A technology of composite materials and graphitized carbon, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of poor electrochemical energy storage properties, small specific surface area of ​​pure graphitized carbon and nitrogen sheets, etc., achieve high nitrogen doping amount, and benefit materials Electric double layer capacitance and pseudocapacitance, effects suitable for mass production

Active Publication Date: 2018-05-18
江阴智产汇知识产权运营有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing nitrogen-doped carbon particles / graphitized carbon-nitrogen composite materials used as supercapacitor electrode materials, which solves the problem of small specific surface area of ​​graphitized carbon-nitrogen sheets and poor electrochemical energy storage properties The problem

Method used

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  • Preparation method and applications of nitrogen doped carbon particle/graphitized carbon-nitrogen composite material
  • Preparation method and applications of nitrogen doped carbon particle/graphitized carbon-nitrogen composite material
  • Preparation method and applications of nitrogen doped carbon particle/graphitized carbon-nitrogen composite material

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Embodiment 1

[0030] (1) Zn(NO 3 ) 2 (100 mmol L -1 , 15 mL) and MIM (100 mmol L -1 , 30 mL) of methanol solution were mixed and stirred at room temperature for 12 h, the product was collected by centrifugation, washed with methanol, and dried in an oven at 60 °C to obtain ZIF-8 crystals;

[0031] (2) The ZIF-8 crystal prepared in step (1) was raised to 800 °C at a heating rate of 2 °C / min in a tube furnace under a nitrogen atmosphere, and calcined at this temperature for 3 h;

[0032] (3) Mix the zinc-nitrogen-doped carbon particles (Zn-NCPs, 0.1 g) prepared in step (2) with 10 g urea and 0.5 g glucose, and then grind them thoroughly. In the muffle furnace, the temperature was raised to 550°C at a rate of 2°C / min, and calcined at this temperature for 3 h to obtain product A; then the calcined product A was transferred to a tube furnace, and under a high-temperature nitrogen atmosphere, the The heating rate was increased to 800°C at a rate of 3°C / min, and calcined at this temperature fo...

Embodiment 2

[0038] (1) Zn(NO 3 ) 2 (100 mmol L -1 , 15 mL) and MIM (100 mmol L -1 , 30 mL) of methanol solution were mixed and stirred at room temperature for 12 h, the product was collected by centrifugation, washed with methanol, and dried in an oven at 60 °C to obtain ZIF-8 crystals;

[0039] (2) The ZIF-8 crystal prepared in step (1) was raised to 800°C at a heating rate of 2°C / min in a tube furnace under a nitrogen atmosphere, and calcined at this temperature for 3 h;

[0040] (3) Mix the zinc-nitrogen-doped carbon particles (Zn-NCPs, 0.05 g) prepared in step (2) with 10 g urea and 0.5 g glucose and grind them thoroughly. In the muffle furnace, the temperature was raised to 550°C at a rate of 2°C / min, and calcined at this temperature for 3 h to obtain product A; then the calcined product A was transferred to a tube furnace, and under a high-temperature nitrogen atmosphere, the The temperature was raised to 800°C at a rate of 3°C / min, and calcined at this temperature for 1 h to ob...

Embodiment 3

[0043] (1) Zn(NO 3 ) 2 (100 mmol L -1 , 15 mL) and MIM (100 mmol L -1 , 30 mL) of methanol solution were mixed and stirred at room temperature for 12 h, the product was collected by centrifugation and washed with methanol, dried in an oven at 60 °C to obtain ZIF-8 crystals;

[0044] (2) The ZIF-8 crystal prepared in step (1) was raised to 800°C at a heating rate of 2°C / min in a tube furnace under a nitrogen atmosphere, and calcined at this temperature for 3 h;

[0045] (3) The zinc-nitrogen-doped carbon particles (Zn-NCPs, 0.2 g) prepared in step (2) were mixed with 10 g urea and 0.5 g glucose and then fully ground. In the muffle furnace, the temperature was raised to 550°C at a rate of 2°C / min, and calcined at this temperature for 3 h to obtain product A; then the calcined product A was transferred to a tube furnace, and under a high-temperature nitrogen atmosphere, the The temperature was raised to 800°C at a rate of 3°C / min, and calcined at this temperature for 1 h to o...

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Abstract

The invention relates to a preparation method and applications of a nitrogen doped carbon particle / graphitized carbon-nitrogen composite material, and belongs to the field of nano composite material preparation. The preparation method mainly comprises following steps: mixing graphitized ZIF-8 polyhedral particles with urea and glucose, grinding the mixture, then burning the powder at a temperatureof 550 DEG C, then burning the powder at a temperature of 700 to 900 DEG C in an inert gas atmosphere so as to further carbonize the material, and finally carrying out pickling to obtain the nitrogendoped carbon particle / graphitized carbon-nitrogen composite material. Due to the addition of mesoporous nitrogen doped carbon particles, the stacking of graphitized carbon-nitrogen layers is inhibited effectively, and thus the composite material has a large specific surface area and a layered porous structure. The preparation method has the advantages of simple and easy technology, good repeatability, low cost, and easy industrial production. The composite material is used as the electrode material of a super capacitor and has high electrochemical energy storage activity.

Description

technical field [0001] The invention belongs to the field of preparation of modified nano-carbon materials, in particular to a preparation method of nitrogen-doped carbon particle / graphitized carbon-nitrogen composite electrode material. technical background [0002] Energy shortage and environmental pollution have become the focus of people's attention. Only by properly handling can the sustainable development of human beings be maintained. In this context, clean energy came into being. As a new type of energy storage device between traditional capacitors and rechargeable batteries, supercapacitors have the advantages of high power density, long cycle life, and less environmental pollution. However, its low energy density (<10 Wh kg -1 ) greatly limits its application. As the core component of supercapacitors, electrode materials largely determine the final energy storage performance of supercapacitors. Two-dimensional (2D) carbon nanomaterials have shown great poten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/36H01G11/30
CPCH01G11/24H01G11/30H01G11/36Y02E60/13
Inventor 徐钟韵徐超陈泉润沈小平孔丽蓉
Owner 江阴智产汇知识产权运营有限公司
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