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A kind of preparation method of supercapacitor electrode material nico2o4

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. It can solve the problems of small specific capacitance, achieve high specific capacitance, solve the difficulty of large-scale application, and have simple preparation methods.

Inactive Publication Date: 2016-05-04
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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  • A kind of preparation method of supercapacitor electrode material nico2o4
  • A kind of preparation method of supercapacitor electrode material nico2o4
  • A kind of preparation method of supercapacitor electrode material nico2o4

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Experimental program
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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 mol ratio of O and urea is 1:2:1 to be dissolved in ethanol and water, and stirred to obtain a mixed solution; wherein, the volumes of the ethanol and water are respectively 15 and 35ml;

[0022] (2) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, keep the filling degree at 80%, put the hydrothermal reaction kettle into a blast drying box, react at 100 ° C for 6 hours, and then cool it. The reactor was brought 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 placed in a muffle furnace and calcined at 250 °C for 120 minutes; the final black sample obtained was 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 obtain a mixed solution; wherein, the volumes of the ethanol and water are 10 and 40 ml respectively; (2) Pour the above mixed solution into In the polytetrafluoroethylene hydrothermal reaction kettle, the filling degree of 80% is maintained, and the hydrothermal reaction kettle is placed in a blast drying oven, reacted at 150° C. for 24 hours, and then the reaction kettle is cooled to room temperature.

[0026] (3) The products obtained by centrifugation were washed with deionized water and ethanol solvent respectively, and dried; the dried samples were calcined at 300°C for 60 minutes in a muffle furnace; the final black samples obtained were 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 mol ratio of O and urea is that 1:2:4 is dissolved in ethanol and water, and stirred to obtain a mixed solution; wherein, the volumes of the ethanol and water are respectively 5 and 45ml;

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

[0030] (3) The products obtained by centrifugation were washed with deionized water and ethanol solvent respectively, and dried; the dried samples were calcined at 350 °C for 120 minutes in a muffle furnace; the final black samples obtained were 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 super capacitor electrode material NiCo 2 O 4 preparation method. Background technique [0002] Energy is the material basis for human survival and development. At present, human beings are facing a serious energy shortage. With the rapid development of the global economy, the continuous consumption of fossil energy, and the increasingly serious environmental pollution, it has become more and more important to study an efficient, low-cost, environment-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 energy more than an order of magnitude larger than traditional physical capacitors, it also has high power density. , short charging time, long service life and other ad...

Claims

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Application Information

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Patent Type & Authority Patents(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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