High-performance nickel-cobalt oxide composite nanowire film for super capacitor

Abstract

The invention discloses a high-performance nickel-cobalt oxide composite nanowire film for a super capacitor. Nickel salt and cobalt salt are used as raw materials, the nickel-cobalt composite nanowire film is generated on a metal titanium substrate, wherein the molar ratio of nickel salt and cobalt salt is 1-5:1-5. The film not only has the advantages of larger specific surface area, simplification in electrode preparation process, alkaline environment stability and the like, but also has excellent super capacitance performance, such as high quality specific capacity and favorable cycle performance, and is an excellent electrode material for the super capacitor in electrochemistry.

Description

technical field [0001] The invention belongs to the field of electrochemical supercapacitors, in particular to a high-performance nickel oxide-cobalt composite nanowire film for supercapacitors. Background technique [0002] Electrochemical supercapacitor is a new energy storage element between traditional capacitors and batteries. It has the characteristics of high specific power of traditional capacitors and high specific capacity of batteries, long cycle life, and wide operating temperature range. It is widely used in electric vehicles, communications, aerospace, signal control and other fields. Electrode materials are the core of supercapacitor performance and the key factor to improve capacitance performance. The development of electrode materials with superior performance has become the goal that researchers have been pursuing for a long time. Nickel oxide and cobalt oxide have become the most popular materials for making supercapacitors due to their high theoretical ...

AI Technical Summary

Problems solved by technology

Although the membranes mentioned in 1-4 above have high capacity, the cycle performance is not good. The main reason is that the Ni(OH) prepared by electrochemical deposition and chemical water bath precipitation 2 、Co(OH) 2 Most of them are porous membranes composed of nano-scale flakes. OH- ions are easy to destroy the flake structure during the process of intercalation and extraction, and the growth is not strong enough to easily fall off the base. Although the fifth type of membrane has good cycle performance, its quality The specific capacity is low, and most of these films are based on nickel, which is unstable to alkaline environments and will be limited in practical use

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