Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 857, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.157628
Keywords
Manganese vanadate; Co-precipitation; Nanopebbles; Energy storage device; Supercapacitor
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Funding
- IRC, Kalasalingam Academy of Research and Education (KARE)
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Manganese vanadate nano pebbles were synthesized using a simple co-precipitation method and calcination process. The nanoparticles exhibited a monoclinic structure with metallic bond vibrations, and were observed to have a pebble-like morphology through microscopic analysis.
Manganese vanadate nano pebbles were prepared by a simple co-precipitation method and calcined at 350 degrees C for 3 h. X-ray diffraction pattern and Fourier transform infrared spectroscopic analysis confirmed the monoclinic structure of Mn2V2O7 with metallic bond vibrations. Morphological features of manganese vanadate nanoparticles were observed as pebble-like morphology via Scanning electron microscope and High-resolution transmission electron microscopic analysis. Oxidation states and optical property of the synthesized manganese vanadate nano pebbles was examined through UV-Visible absorption spectroscopic analysis. Pseudocapacitance nature of prepared manganese vanadate nano pebbles was investigated by cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopic techniques in 4 M aqueous KOH electrolyte. The maximum specific capacitance values of 528 Fg(-1) was attained in 4 M KOH electrolyte solution at 10 mVs(-1). Superior capacitive retention of about 90.1% was achieved along with 99% coulombic efficiency after 3000 continuous cycles. (C) 2020 Elsevier B.V. All rights reserved.
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