Cyclic Voltammetric Study of CuO Thin Film Electrodes Prepared by Automatic Spray Pyrolysis

Abstract

This work deals with the study of effect of scan rate on the cyclic voltammetric performance of cupric oxide (CuO) electrodes prepared using automatic spray pyrolysis. For the synthesis via aqueous route, 50 mL of 1 m Cu(NO3)2·3H2O was used as a precursor solution and stainless steel (SS) plates were used as a conducting substrates. The spray rate was maintained at 2.5 mL min–1, decomposition temperature was kept at 673.15 K. In the analysis, XRD patterns clearly substantiate the formation of CuO on SS. Cyclic voltammetric analysis of the prepared electrodes has been carried out in 1 m KOH at various scan rates from 2 to 100 mV s–1. In CV study, electrode shows decrease in specific capacitance (SC) values with increase in scan rates indicating reversible nature. The achieved highest value of the SC is 58.2 F g–1.

RF Sputter-Deposited Nanostructured CuO Films for Micro-Supercapacitors

“…Supercapacitive performances of other CuO films are summarized as follows. Kambale et al [45] prepared CuO films by automatic spray pyrolysis via an aqueous solution of Cu(NO 3 ) 2 •3H 2 O. The films deposited at 400 • C on stainless-steel substrates display a specific capacitance of 58.2 F g −1 in 1 mol L −1 of a KOH electrolyte.…”

“…Among these film deposition processes, radio-frequency (RF) magnetron sputtering is one of the most pre-eminent industrial practical techniques to achieve high-quality and uniform thickness films with the required chemical composition [35]. For two decades, RF magnetron sputtering has become the most popular deposition technique for the growth of crystalline CuO films [36][37][38][39][40][41][42][43][44][45]. Further, during deposition, thermally activated parameters such as the relaxation time to dissipate the kinetic energy of sputtered species, surface diffusion and structural changes in the surface are effectively influenced by the oxygen partial pressure and the substrate temperature.…”

“…Note that the number of works reporting the supercapacitive properties of CuO films is very limited. We only identified nine articles, which are listed in Table 1 with the brief description of the synthesis procedures [31,[43][44][45][46][47][48][49][50]. All works show multi-step processes (at least three steps) used for the synthesis of CuO films, which are rather complex and costly methods compared with the one-step magnetron sputtering technique, which is also scalable for low-cost industrial production without the use of chemicals in aqueous solutions.…”

Effect of Different Metals Doped in Nickel Oxide Nanomaterials on Electrochemical Capacitive Performance

“…The active electrode materials should be higher specific capacitance, structural stability, and good mechanical to provides long cycling lifetimes. The nano porous active electrode materials prepared by using carbon materials, metal oxides, and conducting polymers such as graphene oxide [1,2], activated carbon [3] and derivatives of carbide materials [4][5][6][7][8][9][10], CuO, NiO, RuO2, Cu2O, Fe2O4, CoO, MnO [11][12][13][14][15][16][17] and polyaniline (PANI), polypyrrole (PPy), polythiophene (PTh) [18][19][20][21][22], The transition metal oxide electrode shows excellent properties of electrochemical performance (Specific capacitance, power density, and cycling stability) than the other types of the electrodes.…”

Preparation of Magnesium Oxide (MgO) thin films by spray pyrolysis and its capacitive characterizations

“…Variety of materials including not only electrically conducting polymers in pure [5][6][7] and composite/hybrid forms [8][9][10] but plenty of transition-metal oxides (TMO) viz. RuO2 [11], Co3O4 [2], Fe2O3 [4], NiO [3], Fe3O4 [12], FeOOH [13][14] Cu(OH)2, NiCo2O4, MnCo2O4 [15][16][17][18][19] etc., are being tested for fabrication of redox capacitors. Ubiquitous need of alternatives for RuO2 resulted due to high cost and limited sources of Ru.…”