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Description
In this study, the high-performance supercapacitor electrodes were fabricated via an activated carbon derived from Kapok shell. The raw biomass carbonization at 800 °C under Ar atmosphere was followed by microwave reflux process using the mixture of HNO3/H2SO4 ratio of 3:1 as a catalytic solution. The activated carbons with and without reflux treatment were characterized by TG, XRD, Raman and SEM techniques. Electrochemical properties of as-prepared materials were investigated within potential ranges from −1 to 0 V in a 6 M KOH solution. The electrochemical measurements were analysis with CV, G/CD and EIS techniques. When applied as a supercapacitor electrode material, it exhibited good electrochemical performance with a specific capacitance of 156.18 F g–1 at 1 A g–1 with current density achieved in the sample with 10 min reflux time. Conversely, the sample without microwave reflux modification exhibited electrochemical performance with a specific capacitance of 83.1 F g–1 at 1 A g–1. The electrochemical performance showed that activated carbon from Kapok shells synthesis with microwave-assisted reflux was an interesting material to create electrode for a supercapacitor.
