Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 46, Issue 4, Pages 4599-4608Publisher
WILEY
DOI: 10.1002/er.7452
Keywords
cobalt-nickel oxide; cyclic voltammetry; energy storage; galvanostatic charge and discharge; nanostructures
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Euphorbia cognata Boiss was utilized as a source of reducing and stabilizing agents for the synthesis and functionalization of Co3O4:NiO nanomaterial. The synthesized nanomaterial exhibited excellent electrochemical characteristics, making it suitable for supercapacitor applications.
We have utilized Euphorbia cognata Boiss as a source of reducing and stabilizing agents for the synthesis and the functionalization facile Co3O4:NiO nanomaterial following hydrothermal route. The phases (Co3O4 and NiO) of synthesized nanomaterial were identified by X-ray diffraction, while spherical nanostructures were scrutinized by field emission scanning electron microscopy. The X-ray photoelectron spectroscopy was used to study surface modification, which revealed the presence of organic O and organic C groups. Furthermore, Tauc plot exhibited a low bandgap of 2.58 eV proposing the improved electrochemical characteristics of synthesized nanomaterial. A reasonable capacitance of 188 and 74 F/g was revealed at 2 mV/s and at 1 A/g, respectively. While the extremely low internal resistance (R-i) of 0.8 omega was determined in the current study, suggesting the good electrochemical conductivity of Co3O4:NiO. Therefore, the present study demonstrated the good electrochemical behavior of the fabricated electrode toward supercapacitor, which was attributed to the increased active sites due to bioactive compounds.
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