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Tatrari, Dr. Gaurav
Luleå University of Technology
in Cooperation with on an Cooperation-Score of 37%
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document
Charge Storage Performance of Structurally Flexible Hybrid Ionic Liquid Electrolyte in Supercapacitor
Abstract
<jats:p id="p1">The electrochemical and charge storage performance of a fluorine-free structurally flexible pyrrolidinium-based ionic liquid hybrid electrolyte (HILE) in a symmetric graphite-based supercapacitor is thoroughly investigated. The HILE revealed thermal decomposition at 270 ºC, a glass transition (T ) temperature of −73 ºC, and ionic conductivity of 0.16 mS cmat 30 ºC. A systematic variable temperature H and P NMR spectroscopy and diffusometry, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge (GCD) are employed. HILE-based supercapacitor demonstrated a notable specific capacitance of 186 Fgat a scan rate of 1 mVsand a specific capacitance of 122 Fgat a current density of 0.5 Ag . The maximum energy density of 49 Wh kg , a power density of 370 W kgat a current density of 0.5 A gand a potential window of 4V were obtained. HILE displayed a promising electrochemical performance over a wide potential window of 4V and temperature range (−20 ºC to 90 ºC) in a symmetric graphite supercapacitor.</jats:p>