ZIF-67-based synthetic method for constructing carbon nitride nano tube with super capacitance performance

A technology of ZIF-67 and synthesis method is applied in the field of preparation of supercapacitor energy storage materials to achieve the effects of easy implementation, good electrochemical activity and simple preparation method

Inactive Publication Date: 2016-11-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there has been no report on the construction of carbon nanotubes with good electrochemical activity by MOFs for SCs. However, many MOFs themselves contain a large am

Method used

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  • ZIF-67-based synthetic method for constructing carbon nitride nano tube with super capacitance performance
  • ZIF-67-based synthetic method for constructing carbon nitride nano tube with super capacitance performance
  • ZIF-67-based synthetic method for constructing carbon nitride nano tube with super capacitance performance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Dissolve 0.328g of 2-methylimidazole and 0.249g of cobalt nitrate hexahydrate in 25mL of methanol under stirring at room temperature, and let stand at room temperature for 24 hours. After the mixture is centrifuged, it is washed with methanol and activated. Vacuum at 60°C After drying for 8 hours, ZIF-67 was obtained.

[0020] Step 2: Weigh 100 mg of ZIF-67 prepared in Step 1, place it in a mortar and grind it for 5 minutes, and under nitrogen protection, heat up to 800°C for 3 hours at a heating rate of 2°C / min to obtain cobalt-doped nitride carbon nanotubes.

[0021] Step 3: Weigh 25 mg of cobalt-doped carbon nitride nanotubes prepared in step 2, dissolve them in 30 mL of hydrochloric acid solution (12 mol / L) and acidify for 24 h, and wash the resulting precipitate with deionized water and absolute ethanol after centrifugation, Vacuum drying at 60°C for 8 hours to obtain high-purity carbon nitride nanotubes.

Embodiment 2

[0023] Step 1: Dissolve 0.328g of 2-methylimidazole and 0.249g of cobalt nitrate hexahydrate in 25mL of methanol under stirring at room temperature, and let stand at room temperature for 32 hours. After the mixture is centrifuged, it is washed with methanol and activated. Vacuum at 60°C After drying for 8 hours, ZIF-67 was obtained.

[0024] Step 2: Weigh 100 mg of ZIF-67 prepared in step 1, place it in a mortar and grind it for 5 minutes, and under nitrogen protection, heat up to 850°C for 3 hours at a heating rate of 2°C / min to obtain cobalt-doped nitride carbon nanotubes.

[0025] Step 3: Weigh 25 mg of cobalt-doped carbon nitride nanotubes prepared in step 2, dissolve them in 30 mL of hydrochloric acid solution (12 mol / L) and acidify for 32 h, and wash the resulting precipitate with deionized water and absolute ethanol after centrifugation, Vacuum drying at 60°C for 8 hours to obtain high-purity carbon nitride nanotubes.

[0026] The test result of the material that abov...

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Abstract

The invention discloses a ZIF-67-based synthetic method for constructing a carbon nitride nano tube with super capacitance performance, and belongs to the technical field of super capacitance energy storage material preparation. Under a nitrogen protection condition, ZIF-67 is taken as a template, and high temperature carbonization is carried out on the template, so that the carbon nitride nano tube with good electrochemical activity is constructed. Based on that the carbon nitride nano tube maintains high specific surface area and good skeleton structure of a precursor MOFs, and then the transmission of electrons and the promotion of energy conversion and energy storage performance are facilitated, so that the carbon nitride nano tube has good electrochemical activity.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor energy storage materials, and the technology relates to the preparation method of metal-organic frameworks (Metal-organic frameworks, MOFs) materials and derivatives thereof, especially the construction of carbon nanotube electrode materials with good capacitance performance by using MOFs construction. Background technique [0002] In recent years, increasing energy consumption and environmental crisis have prompted people to design and develop new energy storage and conversion devices. As a new type of energy storage device between traditional capacitors and batteries, supercapacitors (SCs) have many advantages such as fast charge and discharge efficiency, high power density, and long service life. It has important application value in many fields such as electronic devices. Among them, the electric double layer capacitor uses the interfacial electric double layer capacita...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/36H01G11/32
CPCY02E60/13H01G11/86H01G11/32H01G11/36
Inventor 豆义波郭瑞梅白金泉周健李建荣谢亚勃
Owner BEIJING UNIV OF TECH
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