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Nitrogen-doped and oxygen vacancy-modified zinc manganate nanotube array material as well as preparation method and application thereof

A technology of nanotube array and nanorod array, which is applied in the field of zinc manganate nanotube array materials and its preparation, can solve the problems of poor rate performance and cycle life, low electronic/ionic conductivity, large initial irreversible capacity, etc., and achieve The effects of high magnification, increased specific surface area, increased active sites, and electrical conductivity

Active Publication Date: 2021-07-16
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems such as low electronic / ionic conductivity, large volume change during the electrochemical process, and large initial irreversible capacity, which lead to poor rate performance and cycle life.
This greatly restricts the application of ZnMn2O4 in the field of energy storage

Method used

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  • Nitrogen-doped and oxygen vacancy-modified zinc manganate nanotube array material as well as preparation method and application thereof
  • Nitrogen-doped and oxygen vacancy-modified zinc manganate nanotube array material as well as preparation method and application thereof
  • Nitrogen-doped and oxygen vacancy-modified zinc manganate nanotube array material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] A method for preparing nitrogen-doped and oxygen-vacancy-modified zinc manganate nanotube arrays:

[0095] (1) Preparation of flexible carbon cloth substrate:

[0096] Set the size to 4×4cm 2 The flexible carbon cloth is placed in absolute ethanol for ultrasonic treatment to obtain a cleaned flexible carbon cloth substrate;

[0097] (2) Preparation of N-ZMO nanotube array material:

[0098] A. Preparation of ZnO nanorod array material: 0.1894g Zn(NO 3 ) 2 and 0.4g NH 4 NO 3 Dissolve in deionized water at room temperature and set the volume to 1000mL, and ultrasonically disperse evenly; using graphite electrode as the counter electrode and the flexible carbon cloth substrate obtained in step (1) as the working electrode, at a current density of 0.4mA cm -2 , electrodeposition reaction at 70°C for 1.5h, after natural cooling, rinse with deionized water and dry to obtain ZnO nanorod array material grown on flexible carbon cloth substrate;

[0099] B. Preparation of Zn...

Embodiment 2-5

[0105] The preparation method of embodiment 2-5 is identical with embodiment 1, and difference is that Zn(NO 3 ) 2 the mass used.

[0106] Concrete Zn(NO in the preparation method of embodiment 2-5 3 ) 2 The quality controls used are listed in Table 1.

[0107] Table 1 Zn(NO 3 ) 2 quality control

[0108]

Embodiment 6-9

[0110] The preparation method of embodiment 6-9 is the same as embodiment 1, and difference is that in step (2) A, NH 4 NO 3 the mass used.

[0111] Concrete NH in the preparation method of embodiment 2-9 4 NO 3 The quality controls used are listed in Table 2.

[0112] Table 2 NH 4 NO 3 quality control

[0113]

[0114]

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Abstract

The invention discloses a nitrogen-doped and oxygen vacancy-modified zinc manganate nanotube array material as well as a preparation method and application thereof. Themethod comprises the steps of: carrying out an electrochemical deposition reaction in a zinc nitrate and ammonium nitrate solution by taking a flexible carbon cloth substrate as a working electrode, carrying out an electrochemical deposition reaction in a solution of zinc acetate, manganese acetate, ethanol and water by taking an obtained ZnO nanorod array material growing on the flexible carbon cloth substrate as a working electrode, to obtain a ZnO@ZMO core-shell nanorod array material growing on the flexible carbon cloth substrate; and immersing the ZnO@ZMO core-shell nanorod array material in a sulfuric acid solution to remove the ZnO nanorod array material, placing the obtained ZMO nanotube array material in a vacuum environment, and carrying out a thermal reduction reaction in an ammonia gas atmosphere to obtain the nitrogen-doped and oxygen vacancy-modified zinc manganate nanotube array material. An electrochemical energy storage device made of the material is excellent in performance, and when the material is used as a positive electrode, an obtained battery device is high in capacity, high in multiplying power and long in service life.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a nitrogen-doped and oxygen-vacancy-modified zinc manganate nanotube array material and a preparation method and application thereof. Background technique [0002] With the rapid development of the global economy and the increasing demand for energy, the environmental pollution caused by the excessive consumption of fossil fuels has attracted great attention from all countries in the world, and the development and research of sustainable and renewable energy is imminent. In recent years, the state has vigorously supported the development and research of secondary clean energy, and new energy sources represented by solar energy, wind energy, tidal energy, geothermal energy and biomass energy have emerged. They have the advantages of abundant sources, renewable, green and environmental protection, etc. However, these new energy sources are affected by factor...

Claims

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Application Information

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IPC IPC(8): C01G45/12B82Y40/00H01M4/485H01M4/505H01M10/0525H01M10/054
CPCC01G45/12H01M4/505H01M4/485H01M10/054H01M10/0525B82Y40/00H01M2004/028C01P2004/13C01P2004/03C01P2004/04C01P2002/85C01P2002/82Y02E60/10
Inventor 邱文达林圳超
Owner GUANGDONG IND TECHN COLLEGE
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