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Title: Electrochemical performance of α-MnO 2 nanorods/activated carbon hybrid supercapacitor
Authors: Aravindan, V.
Reddy, M.V. 
Madhavi, S.
Rao, G.V.S.
Chowdari, B.V.R. 
Keywords: α-MnO 2 Nanorods
Activated Carbon
Hybrid Electrochemical Capacitor
Hydrothermal Route
Li-Ion Battery
Issue Date: Jul-2012
Citation: Aravindan, V., Reddy, M.V., Madhavi, S., Rao, G.V.S., Chowdari, B.V.R. (2012-07). Electrochemical performance of α-MnO 2 nanorods/activated carbon hybrid supercapacitor. Nanoscience and Nanotechnology Letters 4 (7) : 724-728. ScholarBank@NUS Repository.
Abstract: Hollondite type α-MnO 2 nanorods are prepared by hydrothermal route at 160 °C for 8 h. The structural and morphological properties are examined by X-ray diffraction, BET surface area, scanning electron microscopy and high resolution transmission electron microscopy. Half-cells (Li/α-MnO 2) are fabricated to study the Li-cycling behavior in both galvanostaic and potentiostatic modes. The α-MnO 2 delivers a stable reversible capacity of ~80 mA h g-1 at constant current 50 mA g-1 up to 50 cycles when cycled between 1.5-3.8 V versus Li. The hybrid electrochemical capacitor is fabricated using α-MnO 2 nanorods (as anode) and activated carbon (as cathode) in non-aqueous medium and cycled between 0-3 V. The hybrid electrochemical capacitor exhibited a stable specific discharge capacitance of 28 F g-1 at high current (60 mA g-1). Further, hybrid electrochemical capacitor displayed a maximum energy and power densities of 9 W h kg-1 and 87 W kg-1, respectively. Copyright © 2012 American Scientific Publishers.
Source Title: Nanoscience and Nanotechnology Letters
ISSN: 19414900
DOI: 10.1166/nnl.2012.1377
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