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Ordered nano-tube array structure electrode material, preparation method and stored energy application

A nanotube array, electrode material technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve problems such as low energy density and poor energy storage efficiency, to improve energy storage efficiency, improve service life, and prevent collapse Effect

Inactive Publication Date: 2012-04-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, commercialized supercapacitors are mainly electric double layer capacitors based on the mechanism of electrolytic positive and negative ion electric double layers to store charges and are constructed with various carbon electrode materials. Although they have the advantages of low manufacturing cost and long service life, they are significantly The disadvantage is that the energy density is very low and the energy storage efficiency is very poor

Method used

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  • Ordered nano-tube array structure electrode material, preparation method and stored energy application
  • Ordered nano-tube array structure electrode material, preparation method and stored energy application
  • Ordered nano-tube array structure electrode material, preparation method and stored energy application

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Embodiment 1

[0022] A supercapacitor electrode material with an ordered nanotube array structure. Firstly, titanium dioxide nanotube arrays with independent tube walls, uniform distribution of tube holes, and adjustable tube diameters are grown on both sides of the base material titanium sheet as the rigid skeleton of the electrode, and then electrochemically active metal oxides are deposited on the nanotube walls to form a large A functional electrode material with a coaxial heterogeneous nanotube array structure in which the specific surface area is arranged in an orderly manner, and is applied to a Faraday supercapacitor.

Embodiment 2

[0024] The preparation method of supercapacitor electrode material of the present invention is as follows:

[0025] Firstly, the self-template anodic oxidation reaction synthesis method is adopted. After the first anodic oxidation reaction of the titanium sheet, the titanium dioxide film layer on the surface is removed by ultrasonic treatment, and the titanium-based titanium dioxide nanotubes are used as a self-template for at least two electrochemical anodic oxidations. reaction to generate titanium dioxide with an ordered nanotube array structure with independent tube walls, uniform tube hole distribution, and adjustable tube diameter. Secondly, the electrochemical deposition synthesis method is adopted, the titanium dioxide nanotube array prepared above is used as the electrode carrier, and the transition metal ion or noble metal ion aqueous solution is used as the reaction electrolyte, and the electrochemical activity is synthesized in situ on the nanotube wall by a cyclic ...

Embodiment 3

[0029] This example is NiO-TiO 2 Ordered nanotube array structure supercapacitor electrode materials and their specific energy storage applications. The metal titanium sheet was ultrasonically cleaned in acetone and ethanol solvents for 20 minutes, and then cleaned in HF (3.3M)-HNO 3(5.6M) in aqueous solution for 15s chemical polishing treatment to form a fresh pure titanium metal surface. A two-electrode electrochemical reaction system was established, with the titanium sheet as the anode and the platinum sheet as the cathode, and the H 3 PO 4 The ethylene glycol / water (50 / 50, V / V) mixed solution of (0.5M)-HF (0.15M) is used as the working electrolyte, reacted for 2h under the condition of constant voltage 30V, and the titanium prepared by self-template anodic oxidation reaction synthesis method Titanium dioxide nanotubes are grown on both sides of the sheet as an electrode carrier material, and after heat treatment at 450°C for 2 hours, the titanium dioxide nanotubes are ...

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Abstract

The invention relates to a preparation method for electrode material of a super capacitor of an ordered nano-tube array structure. A titanium-base titanium dioxide nano-tube is used as a carrier of the electrode; metallic oxide with electrochemical activity is loaded on the tube wall surface of the nano-tube; functional electrode material of the nano-tube array structure is built, wherein the tube diameter of the nano-tube is 50-200nm, the wall thickness is 10-20nm and the length is 0.2-50 mu m. The preparation method is as follows: firstly, adopting the titanium-base titanium dioxide electrode carrier of the ordered nano-tube array structure prepared by a self-template anodic oxidation reaction synthetic method; then, taking the titanium-base titanium dioxide electrode carrier of the ordered nano-tube array structure as a working electrode and transition metal ion or noble metal ion water solution as working electrolyte, carrying out electro reduction-electro oxidation reaction by circulation, synthesizing a metallic oxide coating layer on the wall surface of the nano-meter tube in situ, and preparing electrode material with the electrochemical activity. The electrode material ofthe ordered nano-tube array structure is used as the stored energy application of the electrode of the super capacitor.

Description

technical field [0001] The invention relates to a supercapacitor electrode material and its preparation method and energy storage application, in particular to an ordered nanotube array structure electrode material and its preparation method and energy storage application, belonging to ordered nanomaterials and their electrochemical energy storage technology field. Background technique [0002] At present, commercialized supercapacitors are mainly electric double layer capacitors based on the mechanism of electrolytic positive and negative ion electric double layers to store charges and are constructed with various carbon electrode materials. Although they have the advantages of low manufacturing cost and long service life, they are significantly The disadvantage is that the energy density is very low and the energy storage efficiency is very poor. It is generally believed that based on the reversible redox reaction mechanism of electrochemically active compounds to store c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/04H01G9/042B82B1/00B82B3/00
CPCY02E60/13
Inventor 谢一兵付德刚
Owner SOUTHEAST UNIV
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