Ionic liquid (IL) is now being considered as a novel contender in the development of highly conducting polymer electrolytes rather than a solvent. It has a significant impact on the electrochemical performance of polymer electrolytes. This study emphasizes the significance of low viscosity IL dispersion within a polymer (PVA) matrix. The electrical, structural and photoelectrochemical properties of the IL-doped polymer electrolyte are discussed in detail. These highly conducting IL doped solid polymer electrolytes show promise towards the development of highly efficient Supercapacitors.

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Porous activated carbons are derived from natural waste honeycomb (HC) and paper wasps hive (PW) via carbonization and chemical activation. Both the activated carbons are characterized using BET, SEM, XRD, and Raman studies. Both of them offered approximately the same BET surface area, but different pore structure confirmed by SEM images. The HC-based activated carbon offers a higher degree of disorder compared to PWAC which is confirmed by Raman studies. Two EDLC cells are fabricated using ionic liquid incorporated GPE (PVdF-HFP/ EMImTCM) and activated carbons electrodes (HCAC and PWAC). The EDLC cells are characterized using electrochemical Impedance spectroscopy, cyclic voltammetry, and galvanostatic charge-discharge techniques. The PWAC-based EDLC cell (Cell#2) has been offered large specific capacitance ~ 88 F g− 1 in comparison to HCAC- based EDLC cell (Cell#1) ~ 66 F g− 1. Initial performance of Cell#2 is high due to the micropore nature of PW-based activated carbon as compared to HC-based activated carbon, and its value decreases after certain cycles confirmed by cycling tests. The Cell#1 (HCAC) is offered high-rate performance as compared to Cell#2 (PWAC) which is revealed by EIS studies. It is further confirmed by CV studies that CV profiles of Cell#1 are more rectangular as compared to Cell#2. The voltage range of both cells are optimized and found to be 1.0 V. The cycle performance of both cells was tested and found that Cell#1 is more stable (~ 78% of initial capacitance) as compared to Cell#2 in 2000 cycles.

The primary goal of the current study is to improve the specific capacitance of electric double-layer (EDLC) device using biomass (Tribulus Terrestris) derived activated carbon electrodes synthesized by chemical activation method. Furthermore, high surface area carbon electrodes are characterized using X-ray diffraction (XRD), RAMAN spectroscopy, and scanning electron microscopy (SEM) to confirm the morphological structure. Finally, the electrochemical performance of fabricated EDLC proves a good agreement data using Cyclic Voltammetry (CV), Low Impedance Spectroscopy (LIS), and Galvanostatic Charge–Discharge (GCD) analysis showing the high specific capacitance of 115 Fg−1 for the optimized 1:2 activated carbon material.

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