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Co3O4/MnO2/PPy nanowire array and preparation method thereof

A nanowire array and nanowire technology, applied in the field of electrochemistry, can solve problems such as difficult to meet high-performance supercapacitors, and achieve the effects of high specific surface area, high ion transmission performance, and high conductivity

Inactive Publication Date: 2017-12-15
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the materials prepared by the above method are mostly micro-nano composites between two types of materials, which have certain limitations in terms of conductivity, power density and energy density, and are still difficult to meet the many requirements of high-performance supercapacitors.

Method used

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  • Co3O4/MnO2/PPy nanowire array and preparation method thereof
  • Co3O4/MnO2/PPy nanowire array and preparation method thereof
  • Co3O4/MnO2/PPy nanowire array and preparation method thereof

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preparation example Construction

[0038] The invention provides a Co 3 o 4 / MnO 2 The preparation method of / PPy nanowire array comprises:

[0039] A) Place the substrate in cobalt salt, ammonium salt, CO(NH 2 ) 2 The mixed solution is hydrothermally reacted and annealed to obtain Co 3 o 4 nanowire arrays;

[0040] B) Using a three-electrode system, with Co 3 o 4 The nanowire array is the working electrode, the platinum is the counter electrode, the saturated calomel electrode is the reference electrode, and the mixture of one or more of sodium salt and potassium salt and manganese salt is the electrolyte solution. 3 o 4 Deposition of MnO on the surface of nanowires 2 shell, to get Co 3 o 4 / MnO 2 Core-shell nanowire arrays;

[0041] C) Using a three-electrode system, with Co 3 o 4 / MnO 2 The core-shell structure nanowire array is the working electrode, the platinum is the counter electrode, the saturated calomel electrode is the reference electrode, and the mixture of pyrrole, benzenesulfonate...

Embodiment 13D

[0073] Example 13D Co 3 o 4 Fabrication of Nanowire Arrays

[0074] 5mmol Co(NO 3 ) 2 ·6H 2 O was ultrasonically dissolved in 70 mL of deionized water, and then 10 mmol of NH was added to the solution 4 F and 25mmol CO(NH 2 ) 2 , after magnetically stirring evenly, transfer the solution to a hydrothermal kettle, and clean the cleaned nickel foam (size: 1cm×2cm; pretreatment: ultrasonic cleaning twice with 3mol / L HCl and acetone, and then deionized water Clean it up, put it in ethanol and seal it for storage for later use) into the prepared solution, and then put the hydrothermal kettle into a constant temperature oven at 120°C for 5 hours of reaction. The reacted sample was taken out, washed repeatedly with deionized water and dried, then annealed at 350 °C for 2 h to obtain 3D Co 3 o 4 nanowire arrays, the results are as figure 1 as shown, figure 1 Co of different magnifications prepared for Example 1 of the present invention 3 o 4 SEM images of nanowire arrays. ...

Embodiment 23D

[0075] Example 23D Co 3 o 4 / MnO 2 Fabrication of core-shell nanowire arrays

[0076] Using a standard three-electrode system, the 3D Co obtained in Example 1 3 o 4 The nanowire array is the working electrode, the platinum is the counter electrode, the saturated calomel electrode is the reference electrode, and the mixed solution of manganese acetate and sodium sulfate is the electrolyte, wherein the concentrations of manganese acetate and sodium sulfate are both 0.1mol / L. Electrochemical deposition was carried out by potentiostatic method. The deposition voltage was 1.0V, and the deposition time was 300s. Proceedings 3D Co 3 o 4 / MnO 2 The morphology of the core-shell nanowire array is as follows: figure 2 as shown, figure 2 Co prepared with different magnifications for Example 2 of the present invention 3 o 4 / MnO 2 SEM images of core-shell nanowire arrays. Depend on figure 2 It can be seen that in each Co 3 o 4 The surface of the nanowires is evenly coa...

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Abstract

The present invention provides a Co3O4 / MnO2 / PPy nanowire array. The array comprises a Co3O4 / MnO2 / PPy nanowire array core and a PPY shell layer warping the surface of the Co3O4 / MnO2 / PPy nanowire array core; and the Co3O4 / MnO2 / PPy nanowire array core comprises a Co3O4 nanowire array core grown on a substrate and an MnO2 shell layer warping the surface of the Co3O4 nanowire array core. The Co3O4 nanowire array being perpendicular to the substrate is grown on the substrate, a Co3O4 nanowire is taken as a core, the electrochemical process is employed to prepare MnO2 and PPy multiple complex shell layers at the surface of the Co3O4 nanowire array core so as to obtain Co3O4 / MnO2 / PPy multiple core-shell structure nanowire array composite electrode materials with high specific surface area, high conductivity and high ion transportation performance.

Description

technical field [0001] The invention relates to the field of electrochemical technology, in particular to a Co 3 o 4 / MnO 2 / PPy nanowire array and its preparation method. Background technique [0002] People's excessive dependence on and consumption of non-renewable fossil energy has caused serious energy crisis and environmental problems. Finding renewable, green and clean energy and developing clean energy equipment are of great significance for reducing environmental pollution and promoting sustainable human development. As a new type of green energy storage device, supercapacitors have higher energy density than traditional capacitors, higher power density and cycle life than rechargeable batteries, fast charge and discharge speeds, and are environmentally friendly. It has great application prospects in many fields such as electric vehicles, electric power, communications, railways, and national defense. However, how to make supercapacitors have both high energy de...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/46H01G11/48H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13H01G11/24B82Y30/00B82Y40/00H01G11/26H01G11/30H01G11/46H01G11/48H01G11/86
Inventor 俎喜红李杰熹曾艳娴易国斌黄嘉辉熊伟光张安可李伟钊
Owner GUANGDONG UNIV OF TECH
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