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Preparation method of NiO/H-TiO2 nanotube composite electrode

A nanotube composite and nanotube technology, which is applied in the field of preparation of NiO/H-TiO2 nanotube composite electrodes, can solve problems that are far from meeting the use requirements, achieve enhanced electrical conductivity, improved electrochemical performance, and the method is simple and easy Effect

Inactive Publication Date: 2018-11-13
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, purely by electrochemical reduction method on TiO 2 Self-doping of nanotubes improves its capacitance performance to a certain extent, but it is far from meeting the requirements of use

Method used

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  • Preparation method of NiO/H-TiO2 nanotube composite electrode
  • Preparation method of NiO/H-TiO2 nanotube composite electrode
  • Preparation method of NiO/H-TiO2 nanotube composite electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Preparation of 3D Morphology-Controllable TiO by Constant-voltage Method in Two-electrode System 2 Nanotube electrode: The commercially pure titanium sheet was ultrasonically cleaned in acetone, absolute ethanol and deionized water for 10 min, and dried. At room temperature, the titanium sheet is used as the anode, and the graphite is used as the counter electrode. The distance between the titanium sheet and the graphite electrode is 2-3cm, and the mass fraction in the configuration is 0.25%NH 4 F and 2% deionized water in ethylene glycol solution were anodized by applying a constant voltage. TiO will be generated after anodic oxidation 2 The nanotube electrode was ultrasonically cleaned in absolute ethanol for 30 s to remove the residual electrolyte on the surface of the nanotube. Obtained TiO 2 The length of the nanotube is in the range of 12-15 μm, the diameter of the tube is in the range of 107-128 nm, and the outer diameter is in the range of 170-500 μm. Amorph...

Embodiment 2

[0025] Three-dimensional morphology-controlled TiO 2 Nanotube electrode preparation and calcination temperature are the same as embodiment 1, with crystalline TiO 2 Nanotube array as cathode, graphite as anode in 0.5MNa 2 SO 4 Electrochemical hydrogen doping treatment is carried out in the electrolyte, the distance between the two electrodes is 2-3cm, the applied voltage is 5V and the reaction treatment time is 30s.

Embodiment 3

[0027] Three-dimensional morphology-controlled TiO 2 Nanotube electrode preparation and calcination temperature are the same as in Example 1, H-doped TiO 2 Nanotube electrode is prepared with embodiment 2, with H-TiO 2 The nanotube electrode is the working electrode, Hg / Hg 2 Cl 2 The electrode is used as a reference electrode, and the platinum mesh electrode is used as a counter electrode, in 0.04MNiCl 2 Nickel hydroxide was electrochemically deposited by differential pulse voltammetry in the electrolyte. After the electrochemical deposition was completed, cyclic voltammetry was used in the 1M KOH solution at a voltage range of -1 V–1 V at 100 mV / s Scan 10 pulse cycles to form a complete metal hydroxide, which is calcined at 300°C in a tube furnace to become NiO / H-TiO 2 Nanotube composite electrodes.

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Abstract

The invention discloses electrochemical modification based on TiO2 nanotubes and a preparation method of a TiO2 nanotube composite electrode, and particularly provides a high-performance composite electrode prepared by steps of preparing a TiO2 nanotube array with combination of an anodizing method, an electrochemical reduction method and a differential pulse method, performing modification and depositing an electrode material. The technical scheme is that the method comprises the following steps: firstly, pure Ti is taken as a substrate in a two-electrode system, and the TiO2 nanotube array with ordered structure, controllable morphology and controllable tube length and thickness is prepared with a primary anodizing method; then reverse voltage application treatment is performed on the two-electrode system for electrochemical nitrogen doping; finally, prepared TiO2 nanotubes are subjected to electrochemical deposition of NiO nanoparticles in a three-electrode system with a differential pulse voltammetry method. The prepared NiO / H-TiO2 composite electrode nanoparticles are uniformly dispersed, controllable in particle size and high in electrical conductivity, have higher specific capacitance and energy density and can be better applied to the field of electrochemical energy storage and the field of solar cells.

Description

technical field [0001] The invention belongs to the technical field of energy storage, specifically a NiO / H-TiO 2 A method for preparing a nanotube composite electrode, which uses a combination of anodic oxidation, electrochemical reduction and differential pulse method to prepare NiO / H-TiO 2 Nanotube composite electrode, NiO / H-TiO prepared by this method 2 Nanotube composite electrodes have good electrical conductivity and ultra-high energy density, which provides a new idea for improving the performance of energy storage devices. Background technique [0002] In recent years, due to the advantages of high power density, fast charge and discharge speed, long cycle life, strong cycle stability, clean and pollution-free, supercapacitors have attracted widespread attention in the fields of electronic products, solar cells, distributed energy storage and new energy vehicles. . According to the reaction mechanism, supercapacitors can be divided into electric double layer capa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCH01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 李刚郭丽芳李廷鱼段淑斐王开鹰孙雅静赵清华李朋伟胡杰张文栋
Owner TAIYUAN UNIV OF TECH