Manganese Cobalt Oxide Nanoflakes for Electrochemical Energy Storage

Abstract

Manganese cobalt oxide (MnCo2O4) nanoflakes are synthesized by a simple hydrothermal process. As a supercapacitor electrode material, MnCo2O4 nanoflake exhibits a specific capacitance of 256 Fg-1 at 5 mV s -1 in symmetric twoelectrode configuration. The sample shows an outstanding cyclic stability of 85% retention of specific capacitance after 10,000 charge–discharge cycles at 2 A g-1 . The MnCo2O4 nanoflake-based supercapacitor material shows an energy density value of 25 Wh kg -1 at a power density of 1 kW kg -1 . The present work establishes the suitability of manganese cobalt oxide nanoflakes for supercapacitor electrodes.