The Novel Synergistic Effect of ZnO/TiO2 with Carbonaceous rGO Sheets: As an Emerging High Energy Beneficial Electrode Material for an Asymmetric Supercapacitor Application

• Published in: Journal of inorganic and organometallic polymers and materials 2023-12, Vol.33 (12), p.4096-4116
• Main Authors: Harini, S., Anto Feradrick Samson, V., Bharathi Bernadsha, S., Victor Antony Raj, M., Madhavan, J.
• Format: Article
• Language: English
• Subjects: Asymmetry; Capacitance; Chemistry; Chemistry and Materials Science; Electrode materials; Electrodes; Electron microscopes; Emission analysis; Field emission microscopy; Inorganic Chemistry; Nanocomposites; Organic Chemistry; Photoelectrons; Polymer Sciences; Supercapacitors; Synergistic effect; Titanium dioxide; X ray photoelectron spectroscopy; Zinc oxide
• ISSN: 1574-1443; 1574-1451
• DOI: 10.1007/s10904-023-02709-6

In this article, the ternary nanocomposite of ZnO/TiO 2 /rGO (ZTG) was synthesized via hydrothermal technique. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results substantiated the formation of ternary composites. From field emission-scanning electron microscope (FE-SEM) and high resolution-transmission electron microscope (HR-TEM) analysis, it was noticed that rGO sheets were wrapped tightly on the edges of both ZnO and TiO 2 nanoparticles, which offers high active sites during the electrochemical performances. Brunauer–Emmett–Teller (BET) technique revealed, ZTG-2 obtained a larger surface area of 148.73 m 2 g −1 . Based on the electrochemical performances, the active electrode ZTG-2 nanocomposite exhibited a higher specific capacitance of 1278 F g −1 at a current density of 1 A g −1 . Further, the sample showed an excellent cyclic retention of 90% even after successive 5000 cycles. Additionally, Asymmetric supercapacitor showed a maximum specific capacitance of 360 F g −1 at 1 A g −1 and revealed an energy density of 115.2 Wh kg −1 at a power density of 0.49 W kg −1 respectively. This article signifies the tactical emergence of ZTG-2 as a promising electrode material for supercapacitor application.