High Specific Capacitance Of Electrochemically synthesized Nano MnO2 – Gold Electrodes For supercapacitors

Transition metal ions like MnO2 are promising materials for electrodes in supercapacitors owing to their high capacitance for storing electrical charges and also eco-friendly with plenty of availability. We have decorated honey-bee like MnO2 nanostructure over gold coated silicon wafer by electrodeposition. The electrodeposited material was studied by scanning electron microscope (SEM), which reveals the honey-bee like structure. The thickness was found to be in the range of 30–80 nm using atomic force microscope (AFM). The specific capacitance of this electrode is found to be 1149 Fg -1 , which is very high and flexible for high power applications.