Highly conducting polymer electrolyte-ionic liquid and porous carbon material for sandwich electric double layer capacitor

Abstract

Due to various useful properties of polyethers, the prime objective of present paper is to develop an efficient supercapacitor based on high conducting polymer electrolyte and carbon based materials. To develop such films Polyvinylidene fluoride co-hexafluoropropylene (PVDF-HFP) polymer doped with ionic liquid (IL) 1-ethyl-3-methylimidazolium thiocyanate has been prepared using solution cast technique. The detail studies of polymer electrolyte with optimized value of IL: PVDF-HFP i.e. (80:20) we have reported elsewhere. For electrodes, cobalt enriched porous carbon material has been synthesized and characterized in detail. A sandwiched type electric double layer supercapacitor (EDLC) has been fabricated using maximum conducting polymer-IL film which shows ultra-high capacitance of 294 F/g at room environmental condition. This work successfully demonstrates the suitability of polymer electrolyte in developing highly efficient energy devices.

Ionic liquid doped solid polymer electrolyte: Synthesis, characterization and applications ICSEM-2021

“…The calculated value of specific capacitance shown by the fabricated EDLC at 50 mv/s scan rate on voltage range 0–1 V reaches up to 13.6 F/g using formulawhere “C” represents the total current and “s” denotes the scan rate. This specific capacitance value is comparatively well suited with our earlier reports on Ionic liquid doped polymer electrolyte system 28–31…”

“…where "C" represents the total current and "s" denotes the scan rate. This specific capacitance value is comparatively well suited with our earlier reports on Ionic liquid doped polymer electrolyte system [28][29][30][31]…”

Synthesis of porous carbon from a PVC polymer and its application in supercapacitors

“…From Table 1 and Fig. 8(a), it is clearly seen that there is a tremendous enhancement in the value of the specific capacitance compared to that of the pure PVC derived carbon, 12 which is because of the wettability of the surface sandwiched electrolyte in between the two electrodes and porous nature of the prepared carbon. Additionally, the value of the specific capacitance has been seen to be scan rate dependent, which is also known in supercapacitors.…”

“…pure carbon derived from PVC polymer, shows a small hysteresis curve shape having a very low specific capacitance. 12 On the other hand, an imprecise square hysteresis curve shape seen over a broad voltage range (0-1.6 V) shows the supercapacitor behavior.…”

Conversion of Plastic Waste to Carbon-Based Compounds and Application in Energy Storage Devices

“…The value of the specific capacitance calculated for the cobalt enriched carbon cell in the EDLC was 294 F/g at 5 mV/s (42 times greater than the calculated specific capacitance value of pure carbon), and it was cyclically stable until 800 s. The main reason for this outstanding capacitance was (a) the porosity of the cobalt enriched carbon and (b) the wet surface of the sandwiched electrolyte present between two symmetrical electrodes. 250 …”