Mesoporous carbon/titanium dioxide composite as an electrode for symmetric/asymmetric solid?state supercapacitors

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2022-08-27T00:00:00

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Elsevier Ltd

Abstract

This paper reports the successful synthesis of mesoporous carbon/titanium dioxide (MC/TiO2) composite electrodes via the hydrothermal method for supercapacitor (SC) applications. The morphology and structural properties of MC/TiO2 composites were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectra (FTIR). The electrochemical properties were recorded by cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) with an electrolyte (6 M KOH) in symmetric/asymmetric configuration. The specific capacitance (Cs) evaluated by CV is about 280F/g for composite electrode (95 % capacitance retention after 1000 cycles) and pristine has 150F/g @ 10 mV/s. Enhancement in capacitance is owing to faster charge dynamics within electrode material. The fabricated asymmetric device demonstrates high energy density (30.31 Wh/kg), than the symmetric configuration (?27 Wh/kg). Finally, both symmetric/asymmetric supercapacitors have illuminated a red LED, and strengthens the candidature of composite electrode for energy storage technology. � 2022 Elsevier B.V.

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Capacitance, Cyclic voltammetry, Electrodes, Electrolytes, Fourier transform infrared spectroscopy, Hydrothermal synthesis, Potassium hydroxide, Scanning electron microscopy, Supercapacitor, Asymmetric configurations, Composites electrodes, Fourier transform infrared spectra, Galvanostatic charge/discharge, Hydrothermal methods, Mesoporous carbon, Solid-state supercapacitors, Supercapacitor application, Symmetrics, X- ray diffractions, Titanium compounds

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