Kiruthiga, R. and Nithya, C. and Karvembu, R. and Venkata Rami Reddy, B. (2017) Reduced Graphene Oxide Embedded V2O5 Nanorods and Porous Honey Carbon as High Performance Electrodes for Hybrid Sodium-ion Supercapacitors. Electrochimica Acta, 256. pp. 221-231. ISSN 0013-4686

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Abstract

Attaining high energy density and power density in a single energy storage device is still a major challenge for electrochemical energy storage research community. Sodium-ion hybrid supercapacitor is a sustainable energy storage system which accomplishes the gap between battery and supercapacitor comprises of high energy density-battery type faradaic anode and high power density-supercapacitor type non-faradaic cathode. Here we have reported high surface area (1554 m2 g�1 ) activated porous carbon obtained from naturally occurring viscous liquid honey as a cathode and sol-gel derived, V2O5 nanorods anchored reduced graphene oxide (rGO) nanocomposite as an anode for non- aqueous sodiumion capacitor. When explored honey derived carbon as a non-faradaic cathode, it exhibits a higher specific capacitance of 224 F g�1 and V2O5@rGO anode delivers the maximum capacitance of 289 F g�1 at 0.01 A g�1 vs Na/Na+ . The prepared V2O5@rGO anode has long stable cycle life (V2O5 nanorods@rGO retains 85% of the initial capacitance (112.2 F g�1 ) at the current density of 0.06 A g�1 after 1000 cycles). The assembled sodium-ion capacitor (NIC) using honey derived activated carbon (AC) and V2O5@rGO anode delivers the energy density of 65Wh kg�1 and power density of 72W kg�1 at 0.03 A g�1. The capacity retention is 74% after 1000 cycles at the current density of 0.06 Ag�1. The assembled sodium-ion hybrid capacitor delivers maximum energy and power density and exhibits very long stable cycle life

Item Type:	Article
Uncontrolled Keywords:	Honey derived carbon;V2O5@rGO;insertion electrode;sodium-ion capacitor nanocomposite
Subjects:	Electrodics and Electrocatalysis Nanotechnology Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	17 May 2019 10:31
Last Modified:	17 May 2019 10:31
URI:	http://cecri.csircentral.net/id/eprint/3234

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