One pot and large-scale synthesis of nanostructured metal sulfides: Synergistic effect on supercapacitor performance. Issue 8 (December 2020)

• Record Type: Journal Article
• Authors: Karthikeyan, C; Dhilip Kumar, R; Anandha Raj, J; Karuppuchamy, S
• Other Names: Caliskan Hakan guest-editor.; Reddy Koduru Janardhan guest-editor.; Sohret Yasin guest-editor.
• Is Part Of: Energy & environment. Volume 31:Issue 8(2020)
• Page Start: 1367
• Page End: 1384
• Publication Date: 2020-12
• Subjects: Hydrothermal -- cobalt nickel sulfides -- nickel mesh -- supercapacitor -- synergistic effect; Power resources -- Environmental aspects -- Periodicals; Power resources -- Periodicals; Renewable energy sources -- Periodicals; Energy policy -- Environmental aspects -- Periodicals; Ressources énergétiques; Politique énergétique; Energy policy -- Environmental aspects; Power resources; Power resources -- Environmental aspects; Renewable energy sources; Periodicals; 333.7
• DOI: 10.1177/0958305X19899373
• Languages: English
• ISSNs: 0958-305X

Abstract

Metal sulfides received key interest as an electrode material for storage and conversion of energy. Here, the novel nanostructured N17 S18 and (CoNi)3 S4 materials were synthesized via one-step hydrothermal method, and the synergistic effect of metal ions and electrochemical properties was investigated. A new and simple solution growth technique was employed in this work. The prepared nanopowders were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy techniques. The X-ray diffraction analysis of the prepared nanopowder revealed the formation of cubic phase cobalt nickel sulfides (CoNi)3 S4 and hexagonal phase nickel sulfides (Ni17 S18 ). Scanning electron microscopy analysis display fibrous, flakes and sheet-like morphology for Cox Sx, N17 S18 and (CoNi)3 S4, respectively. Fibrous and sheet-like morphology exhibits higher electrochemical performance in supercapacitors. The electrochemical behavior of the amorphous Cox Sx, crystallite Ni17 S18 and (CoNi)3 S4 modified electrodes was investigated using electrochemical impedance spectroscopy, cyclic voltammetry and galvanostatic charge–discharge techniques. The specific capacitance of 57 F/g and 31 F/g were obtained for the amorphous Cox Sx and crystalline (CoNi)3 S4 powder, respectively. Amorphous Cox Sx modified electrode retains 76% of initial capacitance after 1000 repeated cycling process. These results of this study suggest that the Cox Sx and crystalline (CoNi)3 S4 are appropriate materials for supercapacitor applications.