Biochar-Polymer Composite-Based Electrochemical Double-Layer Capacitors (EDLCs) Using Room-Temperature Ionic Liquid as an Electrolyte.

Abstract

Ionic liquids (ILs) are room-temperature molten salts that are promising as electrolytes for energy storage devices due to their wide electrochemical stability window and high potential. This study investigates the electrochemical performance of biochar-polymer composite-based electrode materials in electrochemical double-layer capacitors (EDLCs), using 1-Butyl-1-methylpyrrolidinium tris (pentafluoroethyl) trifluorophosphate as the ionic liquid electrolyte. EDLCs fabricated using biochar-polymer composite electrodes as active electrode materials. Our results indicate that there is a potential specific capacitance of approximately 206 F/g at a scan rate of 0.1 mV/s within high voltage windows. We will also discuss the effect of varying potential windows on the behavior of EDLCs. Furthermore, additional electrochemical analyses, including galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS), will be presented and discussed.