Abstract
Herein, we report a facile, low-cost and one-step electrodeposition approach for the synthesis
MnCo2O4 (MCO) nanosheet arrays on indium doped tin oxide (ITO) coated glass substrates. The
crystalline phase and morphology of the materials are studied by x-ray diffraction, energy
dispersive x-ray analysis and field-emission scanning electron microscopy. The supercapacitor
performance of the MCO nanosheets are studied in a three-electrode configuration in 2M KOH
electrolyte. The as-prepared binder-free electrode shows a high specific capacitance of 290 F g−1
at 1 mV s−1 with excellent cyclic stability even after 1000 charge/discharge cycles. The obtained
energy density and power density of the MCO nanosheets are 10.04 Wh kg−1 and 5.2 kW kg−1
respectively. The superior electrochemical performances are mainly attributed to its nanosheet
like structure which provides a large reaction surface area, and fast ion and electron transfer rate.
