Ionic liquid-based polymer gel electrolytes for symmetrical solid-state electrical double layer capacitor operated at different operating voltages
作者： S.Nuur Syahidah , S.R. Majid
DOI: 10.1016/J.ELECTACTA.2015.02.215
关键词: Electrode 、 Capacitor 、 Ionic liquid 、 Organic chemistry 、 Ionic bonding 、 Polymer 、 Electrolyte 、 Chemical engineering 、 Capacitance 、 Materials science 、 Ionic conductivity
摘要: Abstract In this work, 1-butyl-2,3-dimethylimidazolium tetrafluoroborate ([bdmim]BF4) ionic liquid is introduced into poly(vinyl pyrrolidone)/poly(vinylidene fluoride-co-hexafluoropropylene) (PVP/PVdF-HFP) blend host to prepare a gel polymer electrolyte (PVP/PVdF-HF-Mg(CF3SO3)2) system for symmetrical solid-state electrical double layer capacitor (EDLC). Ionic liquid-incorporated (GPE) containing 7.5 wt.% [bdmim]BF4 exhibits the optimum room temperature conductivity of (2.92 ± 0.02) × 10−3 S cm−1 and electrochemically stable up +2.4 V. The specific capacitance (Cs) optimised GPE at 100th cycle with porous carbon as electrode delivers 95, 133, 108 117 F g−1 operating voltage 0.8, 1.0, 1.6 2.0 V, respectively, under constant current density 100 mA g−1. displays highest energy power 14 W h kg−1 21 W kg−1, an potential 1.0 V, which qualifies GPE-IL EDLC application.
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