Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 121, Issue -, Pages 93-101Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2018.04.044
Keywords
Supercapacitor; Plate-like zinc cobaltite; Hydrothermal synthesis; Specific capacitance; Electrochemical performance
Funding
- UAEU Program for Advanced Research,United Arab Emirates University, Al Ain, United Arab Emirates [G00001647]
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The electrochemical performance of zinc cobaltite-based nanomaterial depends on its shape and morphology. Here we report on the electrochemical performance of plate-like zinc cobaltite nanocrystalline material synthesized via a facile hydrothermal method. The synthesized material was characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller analysis. It was found to be a single-phase zinc cobaltite nanocrystalline material with a cubic spinel crystal structure. The electrochemical performance of the synthesized plate-like zinc cobaltite nanocrystalline material was evaluated by cyclic voltammetry, cyclic chronopotentiometry and electrochemical impedance spectroscopy. The plate-like zinc cobaltite nanocrystalline material displayed a maximum coulombic efficiency of 78% and a maximum specific capacitance of 812 F/g, and it retained 88% of its capacitance after 5100 cycles. Such electrochemical performance may qualify the plate-like zinc cobaltite nanocrystalline material as a potential electroactive material in supercapacitors.
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