Journal
NANOTECHNOLOGY
Volume 26, Issue 45, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/26/45/455401
Keywords
spinel; nanosheet; electrodeposition; supercapacitor; MnCo2O4
Funding
- DST (Government of India)
- DST-SERB Fast-track young scientist [SB/FTP/PS-065/2013]
- UGC-UKIERI thematic awards [UGC-2013-14/005]
- BRNS-DAE [37(3)/14/48/2014-BRNS/1502]
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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.
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