Improved super capacitive performance of hydrothermally developed Mn and Ni oxides along with activated carbon as ternary nanocomposite. (February 2022)

• Record Type: Journal Article
• Authors: Khalid, Faiza; Saleem, Mohsin; Jabbar, Hamid; Tanvir, Muhammad Gulraiz; Butt, Muhammad Shoaib; Baluch, Abrar H.; Ghaffar, Abdul; Ahsan, Muhammad; Malik, Rizwan Ahmed; Alver, Umit; Alrobei, Hussein; Rehman, Zab dur; Alzaid, Meshal; Khan, Muhammad Zubair
• Is Part Of: Journal of physics and chemistry of solids. Volume 161(2022)
• Publication Date: 2022-02
• Subjects: Nickel and Manganese oxides -- Nanocomposites -- Supercapacitor electrode -- Specific capacitance -- Retention; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2021.110467
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: Nickel oxide-manganese oxide (NMO) nanowires were synthesized, as binary nanocomposite, by simple hydrothermal technique in the wt% of NiO: MnO2 as 2:1. Also, manganese oxide (MO) and nickel oxide/Manganese oxide/activated carbon (NMO/AC) as binary and ternary composites, respectively, were produced for comparative study. All the materials were characterized by X-ray diffraction (XRD) for crystalline information, scanning electron microscopy (SEM) for morphological details, Fourier transform infrared spectroscopy (FTIR) for the indication of vibrational modes, and at the end, cyclic voltammetry analysis (CV), galvanostatic charge/discharge analysis (GCD), and electrochemical impedance spectroscopy for specific capacitance (Cs ) and other super capacitive features. The best results were achieved for NMO nanowires as they exhibited a specific capacitance of 1634.4 Fg -1 at 12 Ag -1 while for NMO/AC, Cs declined to 1347 F/g. After 10, 000 cycles, the specific capacitance of NMO was still sustained at 96.5% which shows magnificent cycling stability. The results show that doping of nickel cation amplifies the electrochemical performance of NMO material as an electrode for supercapacitor application. Graphical abstract: Image 1 Highlights: MnO, binary NiO/MnO2 and ternary NiO/MnO2 /activated carbon nanocomposites as charge storage supercapacitive materials. Hydrothermal synthesis as an easy, cost-effective and high yield approach. Assembly of nanorods form a flower-like appearance provide the large surface area necessary for the charge accumulation. NiO/MnO2 has a high specific capacitance of 1634.4 Fg -1 at 12 Ag -1 with better retention. The specific capacitance of NiO/MnO2 /activated carbon is 1347 F/g.