A kind of preparation method of flake-shaped nano-nickel oxide

A nano-nickel oxide, flake technology, applied in the field of electrochemical material preparation, can solve problems such as difficulty in meeting requirements, and achieve the effect of improving electrochemical performance and excellent cycle stability
CN109755029BActive Publication Date: 2020-04-03YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANSHAN UNIV
Publication Date
2020-04-03

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Abstract

The invention belongs to the technical field of electrochemical materials, and in particular relates to a preparation method of flower-shaped nanometer nickel oxide. The preparation method of the flower-shaped nanometer nickel oxide comprises the following steps: electrolyzing a nickel substrate in a chloride electrolyte to obtain a precursor; and performing heat treatment on the precursor to obtain the flower-shaped nanometer nickel oxide. According to the invention, electrochemical oxidation and heat treatment are combined, so that the nickel oxide with a flower-like stacked structure is obtained; and the single piece of nickel oxide has an ultra-thin structure, which is beneficial to improving the electrochemical performance of the material. The results of embodiments show that the nickel oxide prepared by the preparation method provided by the invention has a specific capacity of 170 mAh / g when the nickel oxide is used as a super-capacitor positive electrode material, and has excellent cycle stability.
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Description

technical field

[0001] The invention belongs to the technical field of preparation of electrochemical materials, and in particular relates to a preparation method of flake-shaped nano-nickel oxide. Background technique

[0002] In recent years, research on electrochemical supercapacitors has received great attention worldwide. Supercapacitors have the advantages of high rate charge and discharge, long cycle life, and environmental friendliness. Therefore, the development of highly active electrode materials is an urgent and promising work in the field of energy storage. Supercapacitors are usually based on activated carbon materials, but the energy density of activated carbon is too low, which limits its application in the field of energy storage.

[0003] The specific capacity of nickel oxide is dozens of times that of carbon materials, and it can be widely concerned and reported as a battery-type supercapacitor material. In alkaline electrolyte, nickel oxide is a highly ...

Claims

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