Abstract
Nanostructured multilayer manganese dioxide/nickel/copper sulfide (MnO2/Ni/CuS) composite films were successfully deposited onto supporting polyethylene terephthalate (PET) substrate through the sequential deposition of CuS, Ni, and MnO2thin films by chemical bath deposition, electrodeposition, and horizontal submersion deposition techniques, respectively. Deposition of each thin-film layer was optimized by varying deposition parameters and conditions associated with specific deposition technique. Both CuS and Ni thin films were optimized for their electrical conductivity whereas MnO2thin film was optimized for its microstructure and charge capacity. The electrochemical properties of nanostructured multilayer MnO2/Ni/CuS composite films were evaluated by cyclic voltammetry as electrode materials of an electrochemical capacitor prototype in a dual-planar device configuration. Cyclic voltammogram in mild Na2SO4aqueous electrolyte exhibited a featureless and almost rectangular shape which was indicative of the ideal capacitive behavior and high cycling reversibility of the electrochemical capacitor prototype. Nanostructured multilayer MnO2/Ni/CuS composite films on supporting polyethylene terephthalate (PET) substrate could potentially be utilized as electrode materials for the fabrication of high performance electrochemical capacitors.
Highlights
The fabrication of thin-film electrochemical capacitor entails the deposition of an electroactive thin film onto an electrically conductive supporting substrate which serves collectively as both the current collector and the supporting substrate
We have reported the successful deposition of nanostructured multilayer manganese dioxide/nickel/ copper sulfide (MnO2/Ni/CuS) composite films on supporting polyethylene terephthalate (PET) substrate through the sequential deposition of CuS, Ni, and MnO2 thin films by chemical bath deposition, electrodeposition, and self-assembly horizontal submersion deposition techniques, respectively
PET substrates were coated with CuS film of varying thickness by repeating the chemical bath deposition processes with each deposited CuS layer air-dried in between
Summary
The fabrication of thin-film electrochemical capacitor entails the deposition of an electroactive thin film onto an electrically conductive supporting substrate which serves collectively as both the current collector and the supporting substrate. The self-assembly horizontal submersion process and the electrophoretic deposition method have been demonstrated to be versatile and cost-effective deposition techniques for the Journal of Nanomaterials deposition and optimization of nanoparticulate manganese dioxide thin films for the fabrication of electrochemical capacitors [4,5,6]. We have reported the successful deposition of nanostructured multilayer manganese dioxide/nickel/ copper sulfide (MnO2/Ni/CuS) composite films on supporting polyethylene terephthalate (PET) substrate through the sequential deposition of CuS, Ni, and MnO2 thin films by chemical bath deposition, electrodeposition, and self-assembly horizontal submersion deposition techniques, respectively. The potential utility of multilayer MnO2/nickel/CuS composite film on PET substrate as electrode materials for the fabrication of high-performance electrochemical capacitor was evaluated
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