Nickel protoxide / silicon nano-wire and use thereof for preparing integrated super capacitor electrode material

Abstract

The invention discloses a NiO / SiN wire and a method for preparing an integrated supercapacitor electrode material with high performance by adopting the material. The preparation method comprises the following steps: (1) the SiN wire is taken as a framework, a nickel membrane is sedimented on the SiN wire by the electroless plating technique to produce a nickel-silicon nanometer wire composite; and (2) the produced nickel-silicon nanometer wire composite is subject to rapid thermal annealing oxidation treatment. The invention adopts the advantages of the SiN wire that the scale is small, the specific surface is large, the surface atom has a large amount of nonsaturated bonds, and the tensiometric property is great, and takes the SiN wire as the framework for loading the NiO nanometer structure. The NiO / SiN wire has high specific capacitance, low equivalent essential resistance and good charging and discharging properties, is compatible with the integrated circuit technique and can be used for preparing the integrated supercapacitor electrode material with high performance.

Description

technical field [0001] The invention belongs to the field of electrochemical capacitor materials, and relates to a method of preparing nickel oxide / silicon nanowires (NiO / SiNWs) on silicon nanowires by electroless nickel plating and thermal oxidation annealing, and using the nickel oxide / silicon nanowires Nanowires are used as electrode materials for integrable supercapacitors. Background technique [0002] Due to the small size, large specific surface area, and large number of unsaturated bonds on the surface atoms of silicon nanowires, silicon nanowires have strong surface activity. NiO / SiNWs high-performance supercapacitor electrode materials can be prepared by using it as a framework for loading NiO nanostructures. [0003] The nano-NiO structure is one of the known transition metal oxides that can be used as electrode materials for supercapacitors. Although its supercapacitive performance is slightly lower than that of RuO materials, its preparation process is simple an...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, carbon nanotubes or activated carbon are generally used as substrates, on which transition metal oxides such as manganese oxide, nickel oxide, and ruthenium oxide are prepared as active materials for supercapacitor electrodes; wherein the supercapacitor electrodes based on ruthenium oxide The material has the best supercapacitive properties, but it is expensive; in addition, other transition metal oxide supercapacitor electrode materials based on activated carbon or carbon nanotubes as the carrier can obtain a large specific surface area, but because the outside is completely covered The surface is covered with transition metal oxides, which leads to an increase in the resistance of the current collector layer, and it is difficult to fully utilize the active material; it has been reported that depositing nickel oxide on the surface of carbon nanotubes can obtain nickel oxide / carbon with high supercapacitive performance. Nanotube structure, but its preparation method is not compatible with integrated circuit process

Images