Electrochemical investigation of orthorhombic structured Mg3(VO4)2 nanoparticles modified estimable electrode for high dense energy devices

Murugesan, M and Nagavenkatesh, KR and Nallamuthu, N and Devendran, P and Ramesh, K (2024) Electrochemical investigation of orthorhombic structured Mg3(VO4)2 nanoparticles modified estimable electrode for high dense energy devices. In: Journal of Energy Storage, 89 .

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Abstract

Hydrothermally synthesized orthorhombic structured magnesium vanadium oxide (Mg3(VO4)2) nanoparticles (NPs) were prepared and calcinated at 600 °C then confirmed by PXRD, FTIR, SEM and EDX for structural, vibrational, morphology and elemental studies respectively. Further, the obtained Mg3(VO4)2 NPs modified electrode was studied with cyclic voltammetry (CV), Galvanostatic charging and discharging (GCD) and electrochemical impedance spectroscopy (EIS) techniques with 1 M of lithium hydroxide (LiOH) as electrolyte medium. The fabricated electrode manifests a remarkable specific capacitance (Csp) of 1068.71 F/g with a scan rate of 5 mV/s. Also for the two-electrode system, the negative electrode is used as an Activated carbon (AC) and prepared orthorhombic-structured Mg3(VO4)2 serves as the positive anode of an asymmetric supercapacitors (ASC) device. This Mg3(VO4)2||AC prototype design achieved the superior Csp of 385.28 F/g at 5 mV/s and it revealed an excellent capacitive performance. From charge-discharge (GCD) measurement the Csp of the device shows 135.88 F/g at 1 A/g. The fabricated ASC device was to deliver 30.69 Wh/kg of higher energy density (ED) and 4250 W/kg of excellent power density (PD). © 2024

Item Type:	Journal Article
Publication:	Journal of Energy Storage
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Activated carbon; Cyclic voltammetry; Electric discharges; Electrochemical electrodes; Electrochemical impedance spectroscopy; Electrolytes; Fourier transform infrared spectroscopy; Lithium compounds; Nanoparticles; Supercapacitor; Synthesis (chemical); Vanadium compounds, Asymmetric supercapacitor; Electrochemical investigations; Energy density; Energy devices; Galvanostatics; Hydrothermal; Hydrothermally synthesized; Mg3(VO4)2 electrode; Orthorhombic structures; Power densities, Magnesium compounds
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	08 Jul 2024 10:11
Last Modified:	08 Jul 2024 10:11
URI:	http://eprints.iisc.ac.in/id/eprint/84751

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