Preparation method of nickel-cobalt oxide electrode material supported by titanium dioxide nanotube array

A nanotube array, titanium dioxide technology, used in the manufacture of hybrid/electric double layer capacitors, etc., can solve the problems of limited application, poor electrochemical activity and conductivity, and achieve the effect of overcoming poor conductivity and optimizing electrochemical performance.

Active Publication Date: 2018-08-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor electrochemical activity and electrical conductivity of titanium dioxide itself, its further application is limited.

Method used

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  • Preparation method of nickel-cobalt oxide electrode material supported by titanium dioxide nanotube array
  • Preparation method of nickel-cobalt oxide electrode material supported by titanium dioxide nanotube array
  • Preparation method of nickel-cobalt oxide electrode material supported by titanium dioxide nanotube array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Sonicate a 1.5cm×5cm titanium sheet with a purity greater than 99.7% in acetone, absolute ethanol, and deionized water for 20 minutes to remove surface oil and oxides, and dry it in an oven for use;

[0033] 2) Put the cleaned and dried titanium sheet as the anode, and the high-purity graphite sheet as the cathode in 0.25mol / L NH 4 F, 7vol%H 2 In the ethylene glycol solution of O, react at a voltage of 60V for 6h; through this step, an array of titanium dioxide nanotubes arranged in order is prepared;

[0034] 3) Calcining the titanium dioxide nanotube array obtained in step 2) under the protection of an argon atmosphere for 3 hours, the heating rate is 2°C / min, and the firing temperature is 450°C, to obtain an amorphous carbon-coated and oxygen vacancy-modified titanium dioxide nanotube array;

[0035] 4) Immerse the amorphous carbon-coated and oxygen-vacancy-modified titania nanotube arrays obtained in step 3) into a solute composition of 1 mmol / L Ni(NO 3 ) 2 +5...

Embodiment 2

[0039] 1) Sonicate a 1.5cm×5cm titanium sheet with a purity greater than 99.7% in acetone, absolute ethanol, and deionized water for 20 minutes to remove surface oil and oxides, and dry it in an oven for use;

[0040] 2) Put the cleaned and dried titanium sheet as the anode, and the high-purity graphite sheet as the cathode in 0.25mol / L NH 4 F, 7vol%H 2 In the ethylene glycol solution of O, react at a voltage of 60V for 6h; through this step, an array of titanium dioxide nanotubes arranged in order is prepared;

[0041] 3) Calcining the titanium dioxide nanotube array obtained in step 2) under the protection of an argon atmosphere for 3 hours, the heating rate is 2°C / min, and the firing temperature is 450°C, to obtain an amorphous carbon-coated and oxygen vacancy-modified titanium dioxide nanotube array;

[0042] 4) Immerse the amorphous carbon-coated and oxygen-vacancy-modified titania nanotube arrays obtained in step 3) into a solute composition of 2 mmol / L Ni(NO 3 ) 2 +4...

Embodiment 3

[0046] 1) Sonicate a 1.5cm×5cm titanium sheet with a purity greater than 99.7% in acetone, absolute ethanol, and deionized water for 20 minutes to remove surface oil and oxides, and dry it in an oven for use;

[0047] 2) Put the cleaned and dried titanium sheet as the anode, and the high-purity graphite sheet as the cathode in 0.25mol / L NH 4 F, 7vol%H 2 In the ethylene glycol solution of O, react at a voltage of 60V for 6h; through this step, an array of titanium dioxide nanotubes arranged in order is prepared;

[0048] 3) Calcining the titanium dioxide nanotube array obtained in step 2) under the protection of an argon atmosphere for 3 hours, the heating rate is 2°C / min, and the firing temperature is 450°C, to obtain an amorphous carbon-coated and oxygen vacancy-modified titanium dioxide nanotube array;

[0049] 4) Immerse the amorphous carbon-coated and oxygen-vacancy-modified titania nanotube arrays obtained in step 3) into a solute composition of 3 mmol / L Ni(NO 3 ) 2 +3...

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Abstract

The invention relates to a preparation method of an amorphous carbon-coated and oxygen vacancy-modified titania nanotube-loaded nickel-cobalt oxide electrode material, comprising the steps of: cleaning a titanium sheet; preparing a titania nanotube array by anodic oxidation; roasting in an argon atmosphere to obtain uniform Anatase phase nanotubes coated with amorphous carbon and modified with oxygen vacancies; chemical bath deposition of nanotube arrays coated with amorphous carbon and modified with oxygen vacancies in a mixed aqueous solution of nickel nitrate, cobalt nitrate and urea to obtain a precursor ; Put the precursor into a tube furnace and bake it under the protection of argon atmosphere to obtain the final product. The invention adopts the chemical bath technology to uniformly load nickel-cobalt oxide on the amorphous carbon-coated and oxygen-vacancy-modified titanium dioxide nanotube array, and can realize the composite electrode by adjusting the molar concentration ratio of the precursor nickel nitrate and cobalt nitrate. The optimization of the electrochemical performance of the material; the electrode material prepared by the method of the invention has high specific capacitance and good cycle performance.

Description

technical field [0001] The invention relates to a preparation method of amorphous carbon coating and oxygen vacancy modification titanium dioxide nanotube array loaded nickel cobalt oxide electrode material, especially introducing amorphous carbon and oxygen into the titanium dioxide nanotube array by using argon protective atmosphere roasting treatment vacancies, and a method of loading nickel cobalt oxides on amorphous carbon-coated and oxygen vacancy-modified titania nanotubes by chemical bath deposition. Background technique [0002] Due to the massive consumption of traditional fossil fuels and the increasingly serious environmental pollution caused by them, it is more and more urgent to develop and research high-efficiency and sustainable clean energy. In recent years, as the core component in the energy conversion-storage-transmission relationship chain, the importance of energy storage devices has become increasingly prominent. Supercapacitors have attracted a lot o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86
Inventor 王岩余翠平吴玉程舒霞郑红梅周琪闫健张勇
Owner HEFEI UNIV OF TECH
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