Electrochemical Effects of Depositing Iridium Oxide Nanoparticles onto Conductive Woven and Nonwoven Flexible Substrates

Abstract

This Article reports methods to deposit iridium oxide nanoparticles (IrO x NPs) onto flexible materials for charge storage and the stable charge−discharge mechanism. In this work, IrO x NPs were electrodeposited onto commercially available flexible surfaces of both knit and nonwoven cotton and nonwoven carbon-based (carbon nanotubes and graphene) textile substrates. Carbon-coated cotton materials were fabricated by reducing graphene oxide on fabric. Flexible electrode materials were fabricated by either reducing graphene oxide on cotton fabric or binding carbon nanotubes/graphene into a free-standing platform. The IrO x NPs were then electrodeposited onto flexible platform samples by applying a positive potential to the fabric. After deposition, the resultant specific capacitance of the materials increased within the range from 192% to 2747% and was stable for over 1000 charge and discharge cycles.

Significance of Flexible Substrates for Wearable and Implantable Devices: Recent Advances and Perspectives

“…In addition to physical coating methods for textile substrates, chemical in situ growth approaches were developed for the direct synthesis of various materials on the surface of textile substrates via various chemical reactions such as hydrothermal reactions, [ 293–295,323,330 ] CVD reactions, [ 296,334,335,337 ] in situ polymerization, [ 298,300b,301,329 ] and electrodeposition. [ 297,331–333 ]…”

ZnO and Ni-doped ZnO photocatalysts: Synthesis, characterization and improved visible light driven photocatalytic degradation of methylene blue

“…The foremost purpose of nanoscience is to tune and limit the material size at nanoscale (1-100 nm) to form devices with excellent performances (Hsu et al 2018). Nanomaterials are used in variety of elds like fuel cells, solar cells, super capacitors, biosensors, resonant devices, adsorption, and catalysis (Kallem et al 2019; Khan et al 2019; Wang and Wolfbeis 2020; Wickramasinghe et al 2019). Synthesis of metal oxides especially transition metal oxides nanoparticles is the main focus of researchers working in the eld of nanotechnology (Choi et al 2019) and as semiconductors, these materials play an important role in electronics, catalysis, solar energy conversion and storage devices (Bibi et al 2019;Lin et al 2019;Zhao et al 2018).…”

Solution‐based deposition of nano‐embossed metal electrodes on cotton fabrics for wearable heaters and supercapacitors

“…However, the low conductivity, flexibility, and non‐patternable characteristics of carbonized cotton electrodes are limitations with regard to the energy‐intensive carbonization process. Various deposition methods of conducting materials onto cotton have been eagerly discussed as alternatives, such as carbon allotropes and conducting polymers 15‐21 . Nevertheless, the relatively low conductivity and weak adhesion of materials on cotton have limited their processability 22‐25 …”

“…Various deposition methods of conducting materials onto cotton have been eagerly discussed as alternatives, such as carbon allotropes and conducting polymers. [15][16][17][18][19][20][21] Nevertheless, the relatively low conductivity and weak adhesion of materials on cotton have limited their processability. [22][23][24][25] Metals have been considered to be ideal candidates as electrode materials utilizing cotton because of their high intrinsic conductivity and flexibility when processed into thin films.…”