Method for preparing hydroxyl cobaltous oxide nanotube electrode

A technology of cobalt oxyhydroxide and nanotubes, which is applied in the direction of cobalt oxide/cobalt hydroxide, nanotechnology, hybrid capacitor electrodes, etc., can solve the problems of complex preparation process of cobalt oxyhydroxide, improve electrochemical performance, improve conductivity, The effect of increased active sites

Inactive Publication Date: 2016-08-17
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a method for preparing a cobalt oxyhydroxide nanotube electrode, the purpose of which is to solve the problem that the existing cobalt oxyhydroxide preparation process is complicated

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  • Method for preparing hydroxyl cobaltous oxide nanotube electrode
  • Method for preparing hydroxyl cobaltous oxide nanotube electrode
  • Method for preparing hydroxyl cobaltous oxide nanotube electrode

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0032] The present invention adopts the ion exchange method in the electrochemical process for the first time to prepare the cobalt oxyhydroxide nanotube electrode material, and the hydroxide ion in the electrolyte replaces the carbonate ion in the basic cobalt carbonate precursor in the first charging process to generate Cobalt hydroxide; in the subsequent charge and discharge process, cobalt h...

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Abstract

The invention discloses a method for preparing a hydroxyl cobaltous oxide nanotube electrode. The method comprises the following steps: (1) mixing soluble cobalt salt, urea and foamed nickel in water, enabling the components to react sufficiently by using a hydrothermal method, washing, and drying so as to obtain a basic carbonate precursor; and (2) by taking the basic carbonate precursor as a supercapacitor electrode piece, performing cyclic voltammetry tests on the electrode piece, wherein ion exchange is generated in the test process so as to generate cobaltous hydroxide nanotubes, thereby obtaining hydroxyl cobaltous oxide nanotubes along with circulation. The method for preparing the hydroxyl cobaltous oxide nanotube electrode, which is disclosed by the invention, is simple in preparation process, and materials for ion exchange can be generated while the precursor is subjected to electrochemical testes, so that regulation and control on solution concentration, reaction time and reaction temperature are avoided, repeatability of the preparation process is improved, and prepared hydroxyl cobaltous oxide is good in stability and excellent in property.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage devices, and more specifically relates to a method for preparing a cobalt oxyhydroxide nanotube electrode. Background technique [0002] Supercapacitors have attracted much attention because they have both the high energy density of batteries and the high power density of capacitors. At present, the research on supercapacitors mainly focuses on the preparation of high-performance electrode materials. [0003] Cobalt oxyhydroxide is regarded as one of the most promising supercapacitor materials due to its low raw material price. Application of cobalt oxide. At present, many studies are devoted to overcome this shortcoming, and an effective method is to combine with other materials such as MnO 2 Composite to increase the original small potential window of cobalt oxyhydroxide to improve its electrochemical performance; in addition, by preparing cobalt oxyhydroxide with differ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/86C01G51/04B82Y40/00
CPCY02E60/13H01G11/46B82Y40/00C01G51/04H01G11/86
Inventor 江建军彭露王春栋缪灵
Owner HUAZHONG UNIV OF SCI & TECH
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