Work

Enhanced electrochemical properties of NiS@CeO2 spherical nanoflakes

Year: 2024

Type: article

Abstract: Herein we report synthesis of bare cerium oxide nanoparticles from cerium hydroxide and NiS@CeO2 nanocomposite (NC) from nickel cinnamaldehyde thiosemicarbazone complex (single source molecular precursor) and CeO2 nanoparticles by solvothermal method using ethylene glycol as a capping agent. These materials were characterized using powder X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy and energy dispersive X-ray techniques. The crystallite size of the composite nanoparticles calculated using XRD is 17.99 nm. TEM shows spherical shape morphology of NiS@CeO2 nanocomposite with average particle size less than 10 nm. Electrochemical properties of bare CeO2 and NiS@CeO2 NC electrodes were evaluated by cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. The electrochemical measurements show that the capacitance value of NiS@CeO2 NC electrode is significantly higher (707.84 F g−1) compared to bare CeO2 electrode (80.91 F g−1) at current density 1 A g−1. This can be attributed to synergistic effect in nanocomposite. The cycle stability of NiS@CeO2 NC electrode was found to be 98.41 % even after 6000 charge–discharge cycles at 2 A g−1 current density.

Source: Next Nanotechnology

DOI: 10.1016/j.nxnano.2024.100126

Authors: Indumati D. Yadav, Dineshkumar Yadav, Aleem Ansari, Shyamalava Mazumdar, Shivram S. Garje

Language: English

Topic: Supercapacitor Materials and Fabrication

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,250

Funders: Indian Institute of Technology Bombay, Sophisticated Analytical Instrument Facility