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Method for preparing porous NiCo2O4/MnO2 nuclear shell nanowire array supercapacitor electrode material

A nanowire array, supercapacitor technology, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology, etc. The problem is that the preparation method is simple, the supercapacitor performance is good, and the low conductivity is solved.

Inactive Publication Date: 2014-02-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] MnO 2 is an inexpensive and inexpensive electrode material, however its low electrical conductivity limits its application in high-performance supercapacitors
Recently, complex methods have been used to deposit MnO with Au as the conductive layer 2 Prepared Au-MnO 2 Composite materials, but gold is too expensive for practical applications

Method used

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  • Method for preparing porous NiCo2O4/MnO2 nuclear shell nanowire array supercapacitor electrode material
  • Method for preparing porous NiCo2O4/MnO2 nuclear shell nanowire array supercapacitor electrode material
  • Method for preparing porous NiCo2O4/MnO2 nuclear shell nanowire array supercapacitor electrode material

Examples

Experimental program
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Embodiment 1

[0027] (1) Put nickel foam of appropriate size into a solution containing 1M hydrochloric acid for ultrasonic cleaning, the purpose is to remove nickel oxide on the surface of nickel foam.

[0028] (2) Weigh the raw material nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O), cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) and urea were dissolved in water and stirred to obtain a mixed solution in which Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The molar amounts of O are 0.1 mmol and 0.2 mmol, respectively, and the amount of urea is 0.05 g.

[0029] (3) Pour the above mixed solution into the polytetrafluoroethylene hydrothermal reaction kettle, keep the filling degree of 80%, and put in a piece of cleaned foam nickel with a size of 1*4cm, and put the hydrothermal reaction kettle Put it into a blast drying oven, react under hydrothermal conditions at 120° C. for 6 hours, and then cool the reaction kettle to room temperature.

[0030] (4) Take out the pink nickel foam,...

Embodiment 2

[0035] (1) Put nickel foam of appropriate size into a solution containing 1M hydrochloric acid for ultrasonic cleaning, the purpose is to remove nickel oxide on the surface of nickel foam.

[0036] (2) Weigh the raw material nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O), cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) and urea were dissolved in water and stirred to obtain a mixed solution in which Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The molar amounts of O are 0.1 mmol and 0.2 mmol, respectively, and the amount of urea is 2 g.

[0037] (3) Pour the above mixed solution into the polytetrafluoroethylene hydrothermal reaction kettle, keep the filling degree of 80%, and put in a piece of cleaned foam nickel, the size of which is 1*4cm, and put the hydrothermal reaction kettle Put it into a blast drying oven, react under hydrothermal conditions at 90°C for 6 hours, and then cool the reaction kettle to room temperature.

[0038] (4) Take out the pink nickel foam...

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Abstract

The invention relates to a method for preparing a porous NiCo2O4 / MnO2 nuclear shell nanowire array supercapacitor electrode material. The method includes the steps of placing nickel foam into a hydrochloric acid solution, carrying out ultrasonic cleaning to obtain cleaned nickel foam, dissolving Ni(NO3)2 6H2O, Co(NO3)2 6H2O and urea into water, carrying out stirring, placing the cleaned nickel foam into the mixture, carrying out the hydrothermal reaction for 3-18 hours at the temperature ranging from 90 DEG C to 180 DEG C, cooling the mixture till the mixture is at the indoor temperature, carrying out ultrasonic washing, drying, roasting, obtaining porous NiCo2O4 nanowire arrays, placing the porous NiCo2O4 nanowire arrays into a mixed solution of Mn(CH3COO)2 and CH3COONH4, carrying out electrochemical deposition and washing, drying, roasting, and obtaining the porous NiCo2O4 / MnO2 nuclear shell nanowire array supercapacitor electrode material. The method is simple, environmentally friendly and low in cost, and the prepared porous NiCo2O4 nanowire arrays have the good electrochemical stability and are the excellent supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, in particular to a porous NiCo 2 o 4 / MnO 2 A preparation method of an electrode material for a core-shell nanowire array supercapacitor. Background technique [0002] People's awareness of the environmental pollution of traditional energy sources is increasing, and due to the limitation of fossil energy sources, it is an urgent problem for people to find "green" and renewable energy technologies. Due to the advantages of high power density, long cycle life, safety, and environmental friendliness, supercapacitors have great application prospects in portable electronic devices, hybrid electric vehicles and a large number of micro devices. Supercapacitors can be divided into electrochemical double layer capacitors and Faraday pseudocapacitors. Pseudocapacitors can undergo reversible Faraday redox reactions on the surface of electrode materials, and thus have high ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/46B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 胡俊青徐开兵杨方邹儒佳李博
Owner DONGHUA UNIV
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