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Preparation method and application of copper oxide/manganese dioxide core-shell nanocone electrode material

A manganese dioxide and electrode material technology, applied in the manufacture of hybrid/electric double layer capacitors, nanotechnology, nanotechnology, etc., can solve the problems of low specific capacity, low manganese conductivity, etc. The effect of reducing drag

Inactive Publication Date: 2016-08-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the theoretical specific capacity of manganese dioxide is high (1370Fg -1 ), abundant reserves, and simple preparation process; however, the conductivity of manganese dioxide is low (10 -5 -10 -6 S cm -1 ), causing its actual specific capacity to be much lower than its theoretical specific capacity

Method used

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  • Preparation method and application of copper oxide/manganese dioxide core-shell nanocone electrode material
  • Preparation method and application of copper oxide/manganese dioxide core-shell nanocone electrode material
  • Preparation method and application of copper oxide/manganese dioxide core-shell nanocone electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a. Nickel foam pretreatment: Sonicate it with 3mol / L dilute hydrochloric acid, absolute ethanol, and distilled water for 0.5h in sequence, and vacuum-dry it. Configure copper nitrate aqueous solution: weigh 0.3738g copper nitrate, 0.3g ammonium fluoride and 0.6g urea and add 40mL H 2 Stir in O until dissolved, pour it into a 50mL hydrothermal kettle, and then put the pretreated 2X2.5cm 2 The nickel foam was placed therein, reacted at 120° C. for 9 hours, cooled to room temperature, the nickel foam was taken out, cleaned, and dried in vacuum. Then calcined at 400°C for 4 hours to obtain nickel foam supported by one-dimensional nano-copper oxide cones.

[0036] b. Configure 0.03M potassium permanganate aqueous solution: add 80mL H to 0.37928g potassium permanganate 2 O and stirred until dissolved. Take 40mL of potassium permanganate aqueous solution and pour it into a hydrothermal kettle, then put the nickel foam supported by the one-dimensional nano-copper oxide cone ...

Embodiment 2

[0044] a. Nickel foam pretreatment: Sonicate it with 2mol / L dilute hydrochloric acid, absolute ethanol, and distilled water for 0.5h in sequence, and vacuum-dry it. Configure copper nitrate aqueous solution: weigh 0.3738g copper nitrate, 0.3g ammonium fluoride and 0.6g urea and add 40mL H 2 Stir in O until dissolved, pour it into a 50mL hydrothermal kettle, and then put the pretreated 2X2.5cm 2 The nickel foam is placed therein, reacted at 80° C. for 12 hours, cooled to room temperature, the nickel foam is taken out, cleaned, and vacuum-dried. Then calcined at 300° C. for 6 hours to obtain nickel foam supported by one-dimensional nano-copper oxide cones.

[0045] b. Configure 0.01M potassium permanganate aqueous solution: add 80mL H to 0.1264g potassium permanganate 2 O and stirred until dissolved. Take 40mL of potassium permanganate aqueous solution and pour it into a hydrothermal kettle, then put the nickel foam supported by the one-dimensional nano-copper oxide cone prep...

Embodiment 3

[0048] a. Nickel foam pretreatment: Sonicate it with 3mol / L dilute hydrochloric acid, absolute ethanol, and distilled water for 0.5h in sequence, and vacuum-dry it. Configure copper nitrate aqueous solution: weigh 0.3738g copper nitrate, 0.3g ammonium fluoride and 0.6g urea and add 40mL H 2 Stir in O until dissolved, pour it into a 50mL hydrothermal kettle, and then put the pretreated 2X2.5cm 2 The nickel foam was placed therein, reacted at 140° C. for 6 hours, cooled to room temperature, the nickel foam was taken out, cleaned, and dried in vacuum. Then calcined at 350°C for 5 hours to obtain foamed nickel supported by one-dimensional nano-copper oxide cones.

[0049] b. Configure 0.02M potassium permanganate aqueous solution: add 80mL H to 0.2529g potassium permanganate 2 O and stirred until dissolved. Take 40mL of potassium permanganate aqueous solution and pour it into a hydrothermal kettle, then put the nickel foam supported by the one-dimensional nano-copper oxide cone...

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Abstract

The invention discloses a preparation method and application of a copper oxide / manganese dioxide core-shell nano-cone electrode material. The specific steps include: a. placing the pretreated nickel foam and copper nitrate aqueous solution in a hydrothermal kettle, and React at 160°C for 3‑12h; cool to room temperature, take out the foamed nickel, clean it, and dry it in vacuum; calcinate at 300‑500°C for 2‑6h to obtain the nickel foam supported by one-dimensional nano-copper oxide cones. b. the nickel foam supported by the one-dimensional nano-copper oxide cone prepared in step a and the concentration of 0.01-0.05M potassium permanganate aqueous solution are placed in a hydrothermal kettle, and reacted at 140-170°C for 1-5h; cooling After reaching room temperature, take out the nickel foam, clean it, and dry it in vacuum to obtain a nano-cone electrode material with copper oxide as the core and manganese dioxide as the shell grown on the nickel foam substrate. This electrode is used to assemble supercapacitors, at 0.4Ag ‑1 Under the current density, its specific capacity is 650Fg ‑1 ; After 2000 cycles of charging and discharging, its specific capacity remains above 85%.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode preparation, and relates to a preparation method of a copper oxide / manganese dioxide core-shell hollow nano-cone electrode based on a nickel foam substrate and its application in supercapacitors. Background technique [0002] In recent years, supercapacitors have gradually become one of the most promising energy storage devices. Compared with ordinary capacitors, it has the advantages of high power density, long service life, fast charge and discharge rate, low maintenance cost, high reliability, and environmental friendliness. Carbon materials, transition metal oxides, conductive polymers and their composites are currently widely used electrode materials. Among them, nano-transition metal oxides are increasingly becoming the electrode materials for supercapacitors because of their low preparation cost and high theoretical specific capacity. . In particular, the theoretical spec...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13H01G11/46B82Y30/00B82Y40/00H01G11/86
Inventor 王育乔王莎莎李红颜孙岳明
Owner SOUTHEAST UNIV
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