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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

AI Technical Summary

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 capacitance, as an electrode material, the volume expansion and the collapse of the microstructure during the charge and discharge process will cause poor cycle performance. bad

Method used

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

Examples

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Embodiment 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, wash with ultrapure water and analytical pure ethanol at 60 °C for 5 times, and then vacuum dry at 80 °C After 24 h, the obtained purple powder was heated at a heating rate of 1 °C / min to 300 °C in an air atmosphere for 1 h, and then cooled to room temperature at a cooling rate of 5 °C / min to obtain a supercapacitor cathode 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 it for 24 h, and then dry it at 2 ℃ / The heating rate of min was raised to 400 °C and calcined for 30 min in an argon atmosphere to prepare carbonized hydrogel. The carbonized hydrogel was soaked in 6 M KOH, and then dried. The resulting mixture was heated at 5 °C / min The heati...

Embodiment 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, wash with ultrapure water and analytical pure ethanol at 60 °C for 5 times, and then vacuum dry at 80 °C After 24 h, the obtained purple powder was heated at a heating rate of 1 °C / min to 300 °C in an air atmosphere for 1 h, and then cooled to room temperature at a cooling rate of 5 °C / min to obtain a supercapacitor cathode 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 it for 24 h, and then dry it at 2 ℃ / The heating rate of min was raised to 400 °C and calcined for 30 min in an argon atmosphere to prepare carbonized hydrogel. The carbonized hydrogel was soaked in 6 M KOH, and then dried. The resulting mixture was heated at 5 °C / min The heati...

Embodiment 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, wash with ultrapure water and analytical pure ethanol at 60 °C for 5 times, and then vacuum dry at 80 °C After 24 h, the obtained purple powder was heated at a heating rate of 1 °C / min to 300 °C in an air atmosphere for 1 h, and then cooled to room temperature at a cooling rate of 5 °C / min to obtain a supercapacitor cathode 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 it for 24 h, and then dry it at 2 ℃ / The heating rate of min was raised to 400 °C and calcined for 30 min in an argon atmosphere to prepare carbonized hydrogel. The carbonized hydrogel was soaked in 6 M KOH, and then dried. The resulting mixture was heated at 5 °C / min The heatin...

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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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