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Ultrasonic chemical bath deposition mediated synthesis and electrochemical study of Mn3O4 flexible electrodes comprising randomly oriented nanoflakes for supercapacitors - Journal of Materials Science: Materials in Electronics

Mn3O4 flexible electrodes (FE) were prepared using a two step process. In the first step the Mn(OH)2 prepared ultrasound chemical bath deposition (UCBD) of on flexible stainless steel strips in second step, these coated strips were annealed in presence of excess oxygen at 573.15 K. Prepared FE exhibits the formation of randomly oriented nanoflakes of average size 100 nm. The hydrophilic nature of FE was confirmed by wettability study. Electrochemical analysis was carried out using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS). The FE exhibits complex charge storage mechanism. The contribution of capacitive (redox) as well as diffusion type of processes is evaluated for different scan rate. High specific energy and low specific power is due to prolonged discharging. The FE exhibits maximum specific capacitance was 1117.59 Fg−1 at scan rate 5 mVs−1 with retention of 88% in its value even after 2500 cycles.