Petal-like NiS-NiO/G-C3N4 Nanocomposite for High-Performance Symmetric Supercapacitor

• Published in: Micromachines (Basel) Vol. 13; no. 12; p. 2134
• Main Authors: Trabelsi, Amira Ben Gouider, Essam, Doaa, H Alkallas, Fatemah, M Ahmed, Ashour, Rabia, Mohamed
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 02.12.2022; MDPI
• Subjects: Batteries; Capacitors; Carbon; Carbon nitride; Composite materials; Computer storage devices; Discharge; Electrolytes; Energy storage; G-C3N4; Morphology; Nanocomposites; Nanoparticles; Nickel oxides; NiO; NiS; Polyvinyl alcohol; porous materials; specific capacitance; Spectrum analysis; Supercapacitors; Voltammetry; Cairo Egypt; Germany; Egypt; NiS; porous materials; specific capacitance; electrolytes; NiO; G-C3N4
• ISSN: 2072-666X; 2072-666X
• DOI: 10.3390/mi13122134

Graphitic carbon nitride (G-C3N4) and NiS-NiO/G-C3N4 nanocomposite have been synthesized via combustion and hydrothermal techniques, respectively. The chemical and morphological properties of these materials were confirmed using different analytical methods. SEM confirms the formation of G-C3N4 sheets containing additional petal-like shapes of NiS-NiO nanoparticles. The electrochemical testing of NiS-NiO/G-C3N4 symmetric supercapacitors is carried out from 0.6 M HCl electrolyte. Such testing includes charge/discharge, cyclic voltammetry, impedance, and supercapacitor stability. The charge/discharge time reaches 790 s at 0.3 A/g, while the cyclic voltammetry curve forms under a high surface area. The produced specific capacitance (C ) and energy density values are 766 F/g and 23.55 W.h.kg , correspondingly.