Bio-inspired electrode materials from Prosopis Juliflora Wood provide 2.2 V with KOH/water/DMF/PVA electrolyte for supercapacitor applications

Abstract

Highly porous carbon material was prepared from Prosopis Juliflora Wood by a simple chemical activation method for different ratios of carbon/KOH at the carbonization temperature of 800°C. The synthesized carbon was investigated by X-ray diffraction (XRD), Fourier transform infrared (FTIR), RAMAN and high-resolution scanning electron microscope (HR-SEM) that ascertain the existence of highly porous activated carbon. High-resolution transmission electron microscope (HRTEM) images clearly show the porous structure. Electrochemical properties of synthesized Activated carbon electrode material were measured with 3 M KOH/Water/DMF electrolyte in three-electrode system. It shows a superior specific capacitance and cyclic stability of 98% up to 5000 cycles. Asymmetric supercapacitor was assembled with V-5 sample and Graphite as positive and negative electrode materials, respectively, using KOH/Water/DMF/PVA as Electrolyte. The fabricated device displays a high energy density of 61.54 W h kg−1 with a power density of 3500 W kg−1 accompanied by good cyclic stability of 92% of capacitance retention over 5000 charge–discharge cycles. This work proides a convenient method to prepare the high value added electrode materials for future wearable and portable electronic devices.