Electrochemical performance of activated carbon-supported vanadomolybdates electrodes for energy conversion
No Thumbnail Available
Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Ltd
Abstract
Reinforcing polyoxomolybdates (POMs) into the activated carbon (AC) template engenders a nanohybrid electrode material for high-performance supercapacitor applications. Herein, a first-time novel integration of two polyoxometalates ([PVMo<inf>11</inf>O<inf>40</inf>]4-, [PV<inf>2</inf>Mo<inf>10</inf>O<inf>40</inf>]5-) with AC has been demonstrated, and their structural and electrochemical performances were analyzed. AC-VMo<inf>11</inf> composite displayed an enhanced capacitance of 450 Fg-1 with an improved energy density of 59.7 Whkg-1. Furthermore, the symmetric supercapacitor cell for AC-VMo<inf>11</inf> and AC-V<inf>2</inf>Mo<inf>10</inf> showed high cell capacitances of 38.8 and 20.01 mF, respectively, alongside 99.99% capacitance retention of over 5000 cycles. In addition, the influence of ionic liquid as an electrolyte on AC-V<inf>2</inf>Mo<inf>10</inf> based supercapacitor cell was investigated in tetrabutylammonium bromide (TBAB) electrolyte solution. © 2021 Elsevier Ltd and Techna Group S.r.l.
Description
Keywords
Capacitance, Electrochemical electrodes, Electrochemical impedance spectroscopy, Electrolytes, Electrolytic capacitors, Energy conversion, Ionic liquids, Molybdenum compounds, Supercapacitor, Activated carbon supported, Electrochemical performance, Electrochemical-impedance spectroscopies, Energy, Energy density, Nano hybrids, Polyoxomolybdates, Power densities, Symmetric supercapacitor, Vanadophosphomolybdate, Activated carbon
Citation
Ceramics International, 2021, 47, 19, pp. 27132-27141