Electrochemistry Conference-2019 , İstanbul, Turkey, 30 September - 02 October 2019, pp.160
It is well known that electrolyte is a crucial part of supercapacitor but traditional liquid electrolytes have usually some disadvantages such as leakage and corrosion. Though these problems have been tackled by replacing liquid electrolytes with solid polymer electrolytes, the application of solid polymer electrolyte in a high-performance supercapacitor is greatly limited due to its low ionic conductivity [1-3]. To achieve both advantages of the liquid electrolyte and solid electrolyte, the gel polymer electrolytes (GPEs) were proposed. A novel hexagonal boron nitride (h-BN)-doped poly (vinyl alcohol)-sulfuric acid (PVA-H2SO4) gel polymer electrolyte (GPE) was fabricated through a simple solution-mixing/casting method. These GPEs electrolyte were characterized using FTIR, DSC, and dielectric-impedance spectroscopy. The polymer electrolyte showed an ionic conductivity of ~1,38x10-2 Scm-1 at 20°C. Moreover, a symmetric supercapacitor, with carbon nanofiber as electrodes and the hBN-PVA-H2SO4 gel polymer as electrolyte was designed. Electrochemical performance studies demonstrated that hBN-PVA-H2SO4 GPE had a maximum electrode specific capacitance (Cs) of ~110 Fg-1. The h-BN doped GPEs, with excellent performance and a simple method are promising materials for the future generation of high performance supercapacitors.