Hierarchical structure of graphene oxide/MnO2 electrodes for supercapacitor

A supercapacitor, also called an ultracapacitor, is a high-capacity capacitor with capacitance value much higher than other capacitors, but lower voltage limits, that bridges the gap between electrolytic capacitors and rechargeable batteries. To synthesize graphene oxide/polypyrrole (GO/PPy) composite, sacrificial template needed such as MnO2 through polymerization of pyrrole in presence GO used for supercapacitor electrode. This GO/MnO2 composite synthesis intermediate step to develop GO/PPy composite. GO’s porous nanostructure offered enough potential electro-active sites deposition which may further sacrificed deposit polypyrrole. exhibited better electrochemical performance The electrode evaluated using aqueous electrolyte at various current densities scan rate. sample was prepared electrochemically characterized CV, GCD EIS. Furthermore displays good rate capability excellent cyclic durability. series resistance charge transfer 23 Ω 20 Ω. From specific analysis from CV well EIS alone showed improved high stability. 144, 204, 212 255 F g−1 1, 2, 4 10 respectively. Similarly, 87, 90, 102 144 shows performance. So it can be applications require flexibility.