Electrochemical performance evaluation of tin oxide nanorod-embedded woven carbon fiber composite supercapacitor

Tin oxide (SnO₂) nanorod (NR)-fabricated composite capacitors have been developed by vacuum-assisted resin transfer molding process. The NRs were synthesized on carbon fiber by following hydrothermal synthesis method. Such SnO₂ grown woven carbon fiber (WCF) capacitor that contains structural and energy storage functions saves system weight and volume; hence, it could offer benefits to electric vehicle, aerospace, and portable electric device industries. The SnO₂-WCF was considered as electrode and exhibited enhanced surface area relative to bare WCF. Energy storage performances of SnO₂-WCF capacitors were characterized by cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy measurements, and improved specific capacitance (0.148 F/g), energy density (15.06 mWh/kg), and power density (1.16 W/kg) were achieved at 30 mM of SnO₂ concentration. Hence, this study shows that the growth of SnO₂ NRs on WCF surfaces offers accessible surface area for electric charge and presented potential application of SnO₂-WCF composites to energy storage industries.