Method of assembling MOF/nitrogen-doped active carbon asymmetric supercapacitor device

A technology of supercapacitor and activated carbon, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of volume expansion, collapse of microstructure, poor cycle performance, etc., to reduce internal resistance, good cycle performance, The effect of increasing the specific capacitance

Inactive Publication Date: 2017-02-22
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Conductive hydrogel also has a huge specific surface area, but due to the limitations of the characteristics of conductive polymers, although it has a high specific cap

Method used

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  • Method of assembling MOF/nitrogen-doped active carbon asymmetric supercapacitor device

Examples

Experimental program
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Example Embodiment

[0014] Example 1:

[0015] (1) Mix and stir cobalt nitrate aqueous solution and 2-methylimidazole aqueous solution at room temperature to synthesize MOF, code name zif-67, centrifuge and wash 5 times with ultrapure water and analytical pure ethanol at 60 ℃, and then vacuum dry at 80 ℃ After 24 h, the obtained purple powder was heated to 300 ℃ at a heating rate of 1 ℃ / min, and calcined in an air atmosphere for 1 h, and then lowered to room temperature at a cooling rate of 5 ℃ / min to prepare a supercapacitor positive electrode material.

[0016] (2) Mix aniline, phytic acid, and ammonium persulfate aqueous solution in an ice water bath to prepare polyaniline hydrogel, then soak the polyaniline hydrogel in deionized water for 24 h, take it out and freeze-dry for 24 h, and then heat it at 2 ℃ / The heating rate is increased to 400 ℃ for 30 min under argon atmosphere, and the carbonized hydrogel is prepared. The carbonized hydrogel is immersed in 6 M KOH, and then dried, the resulting mi...

Example Embodiment

[0019] Example 2:

[0020] (1) Mix and stir cobalt nitrate aqueous solution and 2-methylimidazole aqueous solution at room temperature to synthesize MOF, code name zif-67, centrifuge and wash 5 times with ultrapure water and analytical pure ethanol at 60 ℃, and then vacuum dry at 80 ℃ After 24 h, the obtained purple powder was heated to 300 ℃ at a heating rate of 1 ℃ / min, and calcined in an air atmosphere for 1 h, and then lowered to room temperature at a cooling rate of 5 ℃ / min to prepare a supercapacitor positive electrode material.

[0021] (2) Mix aniline, phytic acid, and ammonium persulfate aqueous solution in an ice water bath to prepare polyaniline hydrogel, then soak the polyaniline hydrogel in deionized water for 24 h, take it out and freeze-dry for 24 h, and then heat it at 2 ℃ / The heating rate is increased to 400 ℃ for 30 min under argon atmosphere, and the carbonized hydrogel is prepared. The carbonized hydrogel is immersed in 6 M KOH, and then dried, the resulting mi...

Example Embodiment

[0024] Example 3:

[0025] (1) Mix and stir cobalt nitrate aqueous solution and 2-methylimidazole aqueous solution at room temperature to synthesize MOF, code name zif-67, centrifuge and wash 5 times with ultrapure water and analytical pure ethanol at 60 ℃, and then vacuum dry at 80 ℃ After 24 h, the obtained purple powder was heated to 300 ℃ at a heating rate of 1 ℃ / min, and calcined in an air atmosphere for 1 h, and then lowered to room temperature at a cooling rate of 5 ℃ / min to prepare a supercapacitor positive electrode material.

[0026] (2) Mix aniline, phytic acid, and ammonium persulfate aqueous solution in an ice water bath to prepare polyaniline hydrogel, then soak the polyaniline hydrogel in deionized water for 24 h, take it out and freeze-dry for 24 h, and then heat it at 2 ℃ / The heating rate is increased to 400 ℃ for 30 min under argon atmosphere, and the carbonized hydrogel is prepared. The carbonized hydrogel is immersed in 6 M KOH, and then dried, the resulting mi...

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Abstract

The invention discloses a method of assembling an MOF (Metal-Organic Framework)/nitrogen-doped active carbon asymmetric supercapacitor device. The method of assembling an MOF/nitrogen-doped active carbon asymmetric supercapacitor device is characterized in that taking an MOF structure as a precursor to prepare metal oxide so as to take the metal oxide as the anode material of a supercapacitor; taking conductive hydrogel as a precursor to prepare porous nitrogen-doped porous active carbon as the cathode material of the supercapacitor; taking PP paper as a diaphragm and using aqueous electrolyte; and according to a cell shell/ anode material/diaphragm/cathode material/cell sandwich structure, assembling the above materials into a button type asymmetric supercapacitor device. The method of assembling an MOF/nitrogen-doped active carbon asymmetric supercapacitor device has the advantages of being simple, environmentally-friendly and reliable in the preparation process, being wide in the source of raw materials, and being low in the cost of the raw materials. Besides, the assembled supercapacitor device is wide in the potential window and is high in the cycle performance; and the aqueous electrolyte is safe and has no danger of liquid leakage, inflammability and vulnerability to pollution. Therefore, the supercapacitor device is an ideal environmentally-friendly supercapacitor device, and is specifically suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, in particular to an assembly method of MOF / nitrogen-doped activated carbon asymmetric supercapacitor devices. The method uses the MOF structure as a precursor to prepare metal oxide as a supercapacitor positive electrode material, and uses a conductive hydrogel as a precursor to prepare porous nitrogen-doped porous activated carbon as a supercapacitor negative electrode material, and assembles a supercapacitor device. Background technique [0002] Supercapacitor (Supercapacitor), or Electrochemical Capacitors (ECs), is an energy storage device between traditional electrostatic capacitors and batteries. In recent decades, it has been considered as the most potential energy storage device besides batteries. There are several important factors affecting the performance of supercapacitor electrodes: electrical conductivity, specific surface area, and wettability with the electrolyte. [000...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/26
CPCY02E60/13H01G11/86H01G11/26H01G11/30
Inventor 樊新陈韦良庞树花方东
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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