Nanostructured CuO thin film deposited on stainless steel using spray pyrolysis as supercapacitor electrode

RF Sputter-Deposited Nanostructured CuO Films for Micro-Supercapacitors

“…The same group also reported a capacitance of 411 F g −1 at 5 mV s −1 for a sample prepared by chemical deposition at the same scan rate [48]. Sayson [44] evaluated the supercapacitive properties of spray-deposited CuO films annealed at 400 • C. In an aqueous electrolyte (1 mol L −1 Na 2 SO 4 ), the films exhibited a capacitance of 87 F g −1 at a scan rate of 10 mV s −1 and a retention of 84.7% after 1000 cycles. Patil et al [32] reported a maximum specific capacitance of 184 F g −1 at the scan rate of 50 mV s −1 and 83% capacitive retention after 5000 cycles in 1 mol L −1 of a KOH electrolyte for CuO films grown by the SILAR technique.…”

“…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.…”

Facile synthesis of copper oxide nanoparticles‐decorated polyaniline nanofibers with enhanced electrochemical performance as supercapacitor electrode

“…In the transition metal oxides family, the copper oxide is one of the most suitable candidate for supercapacitor applications, because its low bandgap (1.2 eV), ample electrochemical properties with high theoretical specific capacitance ($ 1800 F/g), environment friendly nature and low cost. [19][20][21] Moreover, it can be easily synthesized with controlled morphology to achieve high capacitance. In many earlier reports, the specific capacitance of the copper oxides has been enhanced by hybridization with nanocarbon materials.…”

CuO-Ga2O3 Thin Films as a Gas-Sensitive Material for Acetone Detection

“…Among them, copper oxide has become increasingly attractive. The copper oxide is a typical p-type semiconductor, it has been used as a base material for several applications, including solar energy cells [7], optoelectronics [8], catalysis [9,10], biosensors [11], supercapacitors [12], lithium ion batteries [13], electrochemical sensors [14], and gas sensors [15]. An actual review of CuO-based gas sensors was presented by the authors of [16], where various different deposition methods, target gases, and operating conditions were discussed.…”