Cited 20 time in webofscience Cited 19 time in scopus

Electrochemical Performance of Carbon Nanorods with Embedded Cobalt Metal Nanoparticles as an Electrode Material for Electrochemical Capacitors

Title
Electrochemical Performance of Carbon Nanorods with Embedded Cobalt Metal Nanoparticles as an Electrode Material for Electrochemical Capacitors
Authors
Ramakrishnan, P[Ramakrishnan, Prakash]Shanmugam, S[Shanmugam, Sangaraju]
DGIST Authors
Shanmugam, S[Shanmugam, Sangaraju]
Issue Date
2014-04-10
Citation
Electrochimica Acta, 125, 232-240
Type
Article
Article Type
Article
Keywords
Carbon CompositesElectrochemical CapacitorElectrospinningNanoparticles and Nanorods
ISSN
0013-4686
Abstract
We describe a simple method to embed cobalt metal nanoparticles in porous carbon nanorods (Co-CNRs) as a suitable nanostructured electrode material for electrochemical capacitor (EC) applications. The Co-CNRs is synthesized by an easy and versatile electrospinning technique and followed by one step carbonization at 900 C in Ar atmosphere. Comparative studies with different cobalt loading are performed to optimize the minimum cobalt presence in different Co-CNRs to improve specific capacitance as well as life cycle. Cobalt enriched carbon nanorods with a specific surface area (SBET) of 476.1 m2g-1, pore volume of 0.3811 cm3 g -1 and pore sizes ranging from 1.18 nm to 3.78 nm are developed. Electrochemical investigations are carried out using cyclic voltammetry (CV), galvanostatic charge-discharge techniques and electrochemical impedance spectroscopy (EIS). Appreciable capacitance retention is observed, 101 Fg -1at a high scan rate of 100 mVs-1 and 108 Fg -1at a high discharge current of 5 mA. The porous Co-CNR exhibited excellent cycle stability at 50 mVs-1 for 5000 cycles in aqueous 0.5 M H2SO4 electrolyte. © 2014 Elsevier Ltd.
URI
http://hdl.handle.net/20.500.11750/3099
DOI
10.1016/j.electacta.2014.01.103
Publisher
Elsevier Ltd
Related Researcher
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE