NiCo2O4/carbon nanotube composite electrode material and preparation method thereof

A carbon nanotube composite and electrode material technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, can solve the problems of unfavorable supercapacitor electrode materials, high cost, and high energy consumption

Inactive Publication Date: 2018-08-07
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Leela et al. (Asymmetric Flexible Supercapacitor Stack, Nonoscale Research Letters, 2008) used the sol-gel method to prepare metal oxide/multi-walled carbon nanotube composite electrode materials, which showed excellent electrochemical performance, but the sol-gel method added surfactants, Easy to introduce impurities, and the cost is high; Kuan et al (Electrodeposition of Nickel and CobaltMixed Oxide/Carbon Nanotube Thin Films and Their Charge Storage Properties, J. Electorchem. /carbon nanotube coposites, Electrochim. Acta. 2007) and Wen et al. (A three dimensional vertically aligned multiwall carbon nano

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The steps are:

[0031] Step 1: Porous alumina template preparation

[0032] Select an aluminum oxide template with a pore size of 200nm and double-pass, magnetron sputtering a layer of copper film with a thickness of 1 μm on the back, and then after ultrasonic cleaning with trimethylsilyl cyanide, ethanol, and distilled water, dry it for later use;

[0033] Step 2: Fabrication of Nickel-Cobalt Alloy Nanotube Arrays

[0034] Preparation of nickel-cobalt alloy nanotube arrays by square wave pulse electrodeposition in an electrolytic cell: prepare the deposition solution, and its formula is: 262 g / L NiSO 4 •6H 2 O and 562 g / L CoSO 4 •7H 2 O, 40 g / L H 3 BO 3 and 40 g / L (NH 4 ) 2 SO 4 ; The alumina template prepared in the first step was used as the working electrode, the platinum sheet was used as the counter electrode, and the saturated calomel electrode was used as the auxiliary electrode. After adding the deposition solution, the process was carried out at a sq...

Embodiment 2

[0041] The steps are:

[0042] Step 1: Porous alumina template preparation

[0043] Select an aluminum oxide template with a pore size of 200nm and double-pass, magnetron sputtering a layer of copper film with a thickness of 1 μm on the back, and then after ultrasonic cleaning with trimethylsilyl cyanide, ethanol, and distilled water, dry it for later use;

[0044] Step 2: Fabrication of Nickel-Cobalt Alloy Nanotube Arrays

[0045] Preparation of nickel-cobalt alloy nanotube arrays by square wave pulse electrodeposition in an electrolytic cell: prepare the deposition solution, and its formula is: 262 g / L NiSO 4 •6H 2 O and 562 g / L CoSO 4 •7H 2 O, 40 g / L H 3 BO 3 and 40 g / L (NH 4 ) 2 SO 4 ; The alumina template prepared in the first step was used as the working electrode, the platinum sheet was used as the counter electrode, and the saturated calomel electrode was used as the auxiliary electrode. After adding the deposition solution, the process was carried out at a sq...

Embodiment 3

[0052] The steps are:

[0053] Step 1: Porous alumina template preparation

[0054] Select an aluminum oxide template with a pore size of 200nm and double-pass, magnetron sputtering a layer of copper film with a thickness of 1 μm on the back, and then after ultrasonic cleaning with trimethylsilyl cyanide, ethanol, and distilled water, dry it for later use;

[0055] Step 2: Fabrication of Nickel-Cobalt Alloy Nanotube Arrays

[0056] Preparation of nickel-cobalt alloy nanotube arrays by square wave pulse electrodeposition in an electrolytic cell: prepare the deposition solution, and its formula is: 262 g / L NiSO 4 •6H 2 O and 562 g / L CoSO 4 •7H 2 O, 40 g / L H 3 BO 3 and 40 g / L (NH 4 ) 2 SO 4 ; The alumina template prepared in the first step was used as the working electrode, the platinum sheet was used as the counter electrode, and the saturated calomel electrode was used as the auxiliary electrode. After adding the deposition solution, the process was carried out at a sq...

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Abstract

The invention provides a NiCo2O4/carbon nanotube composite electrode material and a preparation method thereof. To be specific, the invention relates to a NiCo2O4/carbon nanotube composite electrode material having a core-shell structure using the carbon nanotube as a core and the NiCo2O4 nanotube as a shell and the overall shape of the material is a height-ordered nanotube array. The preparationmethod comprises: step one, selecting a double-pass aluminium oxide template with a pore diameter of 200 nm, carrying out magnetron sputtering on the back of the template to form a copper film with the thickness of 1 micron, and carrying out trimethylsilyl cyanide, ethyl alcohol, and distilled water ultrasonic cleaning successively, and then carrying out drying; step two, with processed porous aluminium oxide as a template, preparing a nickel-cobalt alloy nanotube array in an electrolytic tank by using a square-wave pulse electro-deposition method; step three, depositing carbon nanotubes in the nickel-cobalt alloy nanotubes by using a chemical vapor deposition method; and step four, removing the aluminium oxide template by using NaOH and carrying out calcination to obtain a NiCo2O4/carbonnanotube composite material. The NiCo2O4/carbon nanotube composite obtained by the method has a high specific capacitance value and good electrochemical performance stability when being applied to thesupercapacitor electrode material.

Description

technical field [0001] The present invention relates to a NiCo 2 o 4 The invention discloses a carbon nanotube composite electrode material and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] In recent years, due to its high power density, short charging time and long cycle life, supercapacitors are widely used in communication, aerospace, large industrial equipment, microelectronic devices and many other occasions that require instantaneous release of large currents, especially It has broad application prospects in the field of new energy vehicles. Electrode material is a key factor affecting the performance of supercapacitors, with RuO 2 Such noble metal oxides have large specific capacitance due to their pseudocapacitive principle, but their high price and toxicity limit their commercial application. Some cheap metal oxides instead of noble metals as electrode materials for supercapacitors have become a resea...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
Inventor 徐靖才洪波王攀峰王新庆彭晓领金红晓葛洪良
Owner CHINA JILIANG UNIV
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