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Charge Storage Performance of Structurally Flexible Hybrid Ionic Liquid Electrolyte in Supercapacitor
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  • Gaurav Tatrari,
  • Sourav Bhowmick,
  • Andrei Filippov,
  • Rong An,
  • Faiz Ullah Shah
Gaurav Tatrari
Lulea tekniska universitet

Corresponding Author:[email protected]

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Sourav Bhowmick
Lulea tekniska universitet
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Andrei Filippov
Lulea tekniska universitet
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Rong An
Nanjing University of Science and Technology Herbert Gleiter Institute of Nanoscience
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Faiz Ullah Shah
Lulea tekniska universitet
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Abstract

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 g) temperature of −73 ºC, and ionic conductivity of 0.16 mS cm −1 at 30 ºC. A systematic variable temperature 1H and 31P 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 Fg −1 at a scan rate of 1 mVs −1 and a specific capacitance of 122 Fg −1 at a current density of 0.5 Ag −1. The maximum energy density of 49 Wh kg −1, a power density of 370 W kg −1 at a current density of 0.5 A g −1 and 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.
18 Jul 2023Review(s) Completed, Editorial Evaluation Pending
18 Jul 2023Submitted to Energy Storage
19 Jul 2023Assigned to Editor
19 Jul 2023Submission Checks Completed
20 Jul 2023Reviewer(s) Assigned
20 Jul 2023Reviewer(s) Assigned
15 Aug 2023Editorial Decision: Revise Major
21 Aug 2023Review(s) Completed, Editorial Evaluation Pending
21 Aug 20231st Revision Received
22 Aug 2023Submission Checks Completed
22 Aug 2023Assigned to Editor
26 Aug 2023Reviewer(s) Assigned
26 Aug 2023Reviewer(s) Assigned
22 Oct 2023Editorial Decision: Accept