High-performance of the ZnO/NiS nanocomposite electrode materials for supercapacitor

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2024-01, Vol.680, p.132749, Article 132749
• Main Authors: Godlaveeti, Sreenivasa Kumar, G, Venkata Ramana, Sangaraju, Sambasivam, Mohammed, Abdallah A.A., Arla, Sai Kumar, Nirlakalla, Ravi, Somala, Adinarayana Reddy, Nagireddy, Ramamanohar Reddy
• Format: Article
• Language: English
• Subjects: Hydrothermal method; Mixed morphology of ZnO; Ni foam; Solid state reaction method; Supercapacitor
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2023.132749

In this work, a single transition metal oxide (ZnO) and metal sulfide (NiS) synthesized through a hydrothermal method and their combination of composite materials have been successfully prepared a simple and an easy approch a solid-state method. As the synthesized composite (ZnO/NiS) prepared different percentage ratio such as 7:3, 5:5 and 3:7 respectively. The ZnO, NiS and their nanocomposite materials characterized by using the XRD, SEM, HR-TEM, XPS and EDAX analysis. The electrochemical performance of as prepared electrode materials analyzed by CV, GCD and EIS spectra. The synthesized nanocomposite of ZnO/NiS at 5:5 ratio exhibited the brilliant capacitance of 1322 Fg−1 at 1 Ag−1 current density, capacitance retention of 76.66 % for continuous 1000 cycles at 4 Ag−1 and also calculated the power and energy density. These results suggests the ZnO/NiS at 5:5 ratio electrode is favorable electrode for an excellent performance supercapacitor. [Display omitted] •Novel binary ZnO/NiS different ratio composite was prepared through a solid-state method.•ZnO/NiS electrode characterized and confirmed by the XRD, SEM, HR-TEM and EDAX techniques.•ZN-(5:5) electrode exhibit higher Csp about 1322 Fg−1 at 1 Ag−1 current density.•ZN-(5:5) Csp was retained at 76.66 % after 1000 charge-discharge cycles at 4 Ag−1.