Research Information System
Electrochemistry Conference-2019 , İstanbul, Turkey, 30 September - 02 October 2019, pp.160, (Summary Text)
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.