Electrochemical Studies on Corncob Derived Activated Porous Carbon for Supercapacitors Application in Aqueous and Non-aqueous Electrolytes
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Electrochemical Studies on Corncob Derived Activated Porous Carbon for Supercapacitors Application in Aqueous and Non-aqueous Electrolytes
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| Creator |
Karnan, M.
Subramani, K. Srividhya, P.K. Sathish, M. |
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| Subject |
Electrochemical Materials Science
Electrochemical Power Sources |
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| Description |
Corncob carbon prepared by means of (KOH) chemical activation method at 600 �C for 1 h is shown as a
promising electrode material for supercapacitors. The XRD analysis of the activated corncob carbon
shows highly amorphous and disordered structure. The specific surface area and pore volume of the
activated carbon are analysed using Brunauer-Emmett-Teller (BET) method. The calculated BET surface
area of activated corncob carbon is
�
800 m2 g�1 with micro and mesoporous in nature. The porous
nature of the carbon is further confirmed using SEM and HR-TEM analysis. The electrochemical studies in
aqueous electrolytes reveal that a high specific capacitance of 390 F g�1 at 0.5 A g�1 current density. The
electrochemical performance of activated corncob electrodes is studied in three different ionic liquids,
among them the EMIMBF4 possess good capacitive behaviour and the wide potential window resulted a
high energy density of 25 Wh kg�1 and power density of 174 W kg�1. The supercapacitor device fabricated
using the ionic liquid could power a red LED for more than 4 min after upon 10 s charging. The above
investigation clearly indicates that the corncob derived carbon materials are promising for applications in
supercapacitor.
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| Publisher |
Elsevier B.V.
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| Date |
2017-01-17
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3229/1/064-2017.pdf
Karnan, M. and Subramani, K. and Srividhya, P.K. and Sathish, M. (2017) Electrochemical Studies on Corncob Derived Activated Porous Carbon for Supercapacitors Application in Aqueous and Non-aqueous Electrolytes. Electrochim Acta, 228. pp. 586-596. ISSN 0013-4686 |
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| Relation |
http://www.elsevier.com/locate/electacta
http://cecri.csircentral.net/3229/ |
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