Electrochemical deposition of manganese hexacyanoferrate nanoparticles on a graphite substrate for supercapacitor application

Electrochemical deposition of manganese hexacyanoferrate nanoparticles on a graphite substrate for supercapacitor application Electrochemical deposition of manganese hexacyanoferrate nanoparticles on a graphite substrate for supercapacitor application In this research, manganese hexacyanoferrate nanoparticles were deposited on a graphite substrate via electrochemical deposition method at a pulse constant current of 100 μA (0.5 s on and 0.5 s off) and at room temperature. The as-prepared electrode was characterized using X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM). Electrochemical performance of the binder-free MnHCF electrode as supercapacitor electrode was investigated using cyclic voltammetry and galvanostat charge /discharge measurements in solution of 0.5 M sodium sulfate. The results of electrochemical tests showed that the prepared electrode possessed a high specific capacitance of 367 F g-1 at a current density of 1 A g-1, an appropriate rate capability and good capacitance retention of 88.8% after 1,000 cycles, indicating its high energy storage performance.