Silver nanowire/nickel hydroxide nanosheet composite for a transparent electrode and all-solid-state supercapacitor

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Silver nanowire (Ag NW) composites are promising for transparent electrodes but suffer from high junction resistance due to weak NW contacts.
• Improving electrical conductivity and stability in Ag NW films is crucial for advanced applications.
• Nickel hydroxide (Ni(OH)2) nanosheets offer unique properties for material functionalization.

Purpose of the Study:

• To develop a simple method for creating Ag NW/Ni(OH)2 NS composites.
• To enhance the optoelectronic properties and thermal stability of Ag NW films.
• To explore the application of these composites in all-solid-state flexible supercapacitors.

Main Methods:

• Coating ultrathin nickel hydroxide (Ni(OH)2) nanosheets (NSs) onto Ag NW films.
• Characterizing the optoelectronic performance (sheet resistance, optical transmittance) of the composite films.
• Fabricating and evaluating all-solid-state flexible supercapacitors using the Ag NW/Ni(OH)2 NS composite.

Main Results:

• The Ag NW/Ni(OH)2 NS composite significantly reduced sheet resistance (18.56 Ω □⁻¹) while maintaining high optical transmittance (90.26%).
• The composite exhibited improved thermal stability compared to pure Ag NW films.
• The fabricated flexible supercapacitors demonstrated high specific capacitance, moderate cycle stability, and good mechanical flexibility.

Conclusions:

• The simple coating of Ni(OH)2 NSs effectively improves Ag NW junction contacts, leading to superior optoelectronic performance.
• The Ag NW/Ni(OH)2 NS composite is a viable material for high-performance transparent electrodes.
• This composite shows significant potential for next-generation all-solid-state flexible supercapacitors.