Sugar derived Carbon-MnO2nano rods for High Performance Supercapacitors

Kumar, Amit and Martha, Surendra Kumar (2019) Sugar derived Carbon-MnO2nano rods for High Performance Supercapacitors. Masters thesis, Indian institute of technology Hyderabad.

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Abstract

In this work, we have discussed the low-cost metal oxide, and commercially available sugar derived carbon as carbon-MnO2 composite electrode for high-performance supercapacitors with an aqueous electrolyte. An efficient and novel method has been developed from electrode materials for application of supercapacitor depending on hybrid material of graphite sheet /C-MnO2, where the surface of carbon fiber was uniformly coated with Carbon-MnO2.The characterization and semblance of the electrochemical supercapacitor cells have been done in 0.5 M sodium sulphate aqueous electrolyte.Sugar derived Carbon-MnO2 nanorods are synthesised by hydrothermal treatment. The discharge capacitance is 625 F g-1 when the electrodes are cycled in 0.5 M Na2SO4 at a current density of 2 Ag−1. The capacitance retention was observed to be 99% after 5000 cycles. Due to the high area and porosity of the surface of carbon manganese oxide composite, high discharge and retention of capacitance are observed. As the manganese dioxide is inexpensive, the Carbon-MnO2nanorodsmay find its wide application in industries.

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