Preparation method of supercapacitor electrode material NiCo2O4

A technology of supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve problems such as small specific capacitance, achieve high specific capacitance, simple preparation method, and difficult large-scale application.

Inactive Publication Date: 2013-05-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, a variety of NiCo with different morphologies and structures have been prepared. 2 o 4 Electrode material, but the obtained specific capacitance is relatively small

Method used

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  • Preparation method of supercapacitor electrode material NiCo2O4
  • Preparation method of supercapacitor electrode material NiCo2O4
  • Preparation method of supercapacitor electrode material NiCo2O4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh the raw material nickel nitrate hexahydrate Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 The molar ratio of O and urea is that 1:2:1 is dissolved in ethanol and water, and stirs, makes mixed solution; Wherein, the volume of described ethanol and water is respectively 15, 35ml;

[0022] (2) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, keep the filling degree of 80%, put the hydrothermal reaction kettle into a blast drying oven, react at 100°C for 6 hours, and then cool Reactor to room temperature.

[0023] (3) The product obtained by centrifugation was washed with deionized water and ethanol solvent respectively, and dried; the dried sample was put into a muffle furnace and calcined at 250°C for 120 minutes; the final black sample obtained was a supercapacitor NiCo 2 o 4 electrode material.

Embodiment 2

[0025] (1) Weigh the raw material nickel nitrate hexahydrate Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 The molar ratio of O and urea is 1:2:2, dissolve in ethanol and water, and stir to prepare a mixed solution; wherein, the volumes of ethanol and water are 10 and 40ml respectively; (2) Pour the above mixed solution into In the polytetrafluoroethylene hydrothermal reaction kettle, the filling degree was kept at 80%, and the hydrothermal reaction kettle was put into a blast drying oven, and reacted at 150° C. for 24 hours, and then cooled the reaction kettle to room temperature.

[0026] (3) The product obtained by centrifugation was washed with deionized water and ethanol solvent respectively, and dried; the dried sample was placed in a muffle furnace and calcined at 300°C for 60 minutes; the final black sample obtained was a supercapacitor NiCo 2 o 4 electrode material.

Embodiment 3

[0028] (1) Weigh the raw material nickel nitrate hexahydrate Ni(NO 3 )2·6H 2 O, Co(NO 3 ) 2 ·6H 2 The molar ratio of O and urea is 1:2:4, is dissolved in ethanol and water, and stirs, makes mixed solution; Wherein, the volume of described ethanol and water is respectively 5, 45ml;

[0029] (2) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, keep the filling degree of 80%, put the hydrothermal reaction kettle into a blast drying oven, react at 200°C for 24 hours, and then cool Reactor to room temperature.

[0030] (3) The product obtained by centrifugation was washed with deionized water and ethanol solvent respectively, and dried; the dried sample was put into a muffle furnace and calcined at 350°C for 120 minutes; the final black sample obtained was a supercapacitor NiCo 2 o 4 electrode material.

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Abstract

The invention relates to a preparation method of supercapacitor electrode material NiCo2O4. The preparation method comprises: (1) hexahydrated nickel nitrate Ni (NO3) 2 6H2O, hexahydrated cobalt nitrate Co (NO3) 2 6H2O and ureophil in a molar ratio of 1:2:1-10 are added to a mixed solution of ethanol and water, stirred and dissolved so as to obtain a mixed solution; and (2) a hydrothermal reaction is conducted to the mixed solution, the reaction temperature is from 90 DEG C and 200 DEG C, the reaction time is from 3h to 48 h, the mixed solution is cooled to the room temperature so as to obtain the NiCo2O4 by centrifuging, and then the NiCo2O4 is washed, dried and calcined so that the material NiCo2O4 is obtained. The materials obtained through the preparation method are high in specific capacitance and good in electrochemical stability and are excellent supercapacitor electrode materials. The preparation method has the advantages of being simple, green and environment-friendly and low in cost.

Description

technical field [0001] The invention belongs to the field of preparation of electrode materials, in particular to a supercapacitor electrode material NiCo 2 o 4 method of preparation. Background technique [0002] Energy is the material basis for human survival and development. Currently, human beings are facing serious energy shortages. With the rapid development of the global economy, the continuous consumption of fossil energy, and the increasingly serious environmental pollution, it is becoming more and more important to study a high-efficiency, low-cost, environmentally friendly, and high-performance energy conversion and storage system. Electrochemical capacitors, also known as supercapacitors, are capacitors with better performance than traditional capacitors. Because this new type of energy device can store more than an order of magnitude more energy than traditional physical capacitors, it also has high power density. , short charging time, long service life and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30
CPCY02E60/13
Inventor 胡俊青邹儒佳徐开兵李文尧刘锡建王滕
Owner DONGHUA UNIV
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