Coconut kernel-derived activated carbon as electrode material for electrical double-layer capacitors

Kishore, Brij and Shanmughasundaram, D and Penki, Tirupathi Rao and Munichandraiah, N (2014) Coconut kernel-derived activated carbon as electrode material for electrical double-layer capacitors. In: JOURNAL OF APPLIED ELECTROCHEMISTRY, 44 (8). pp. 903-916.

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Abstract

Carbonization of milk-free coconut kernel pulp is carried out at low temperatures. The carbon samples are activated using KOH, and electrical double-layer capacitor (EDLC) properties are studied. Among the several samples prepared, activated carbon prepared at 600 A degrees C has a large surface area (1,200 m(2) g(-1)). There is a decrease in surface area with increasing temperature of preparation. Cyclic voltammetry and galvanostatic charge-discharge studies suggest that activated carbons derived from coconut kernel pulp are appropriate materials for EDLC studies in acidic, alkaline, and non-aqueous electrolytes. Specific capacitance of 173 F g(-1) is obtained in 1 M H2SO4 electrolyte for the activated carbon prepared at 600 A degrees C. The supercapacitor properties of activated carbon sample prepared at 600 A degrees C are superior to the samples prepared at higher temperatures.

Item Type:	Journal Article
Publication:	JOURNAL OF APPLIED ELECTROCHEMISTRY
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Keywords:	Coconut kernel; Activated carbon; Supercapacitor; Specific capacitance
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	03 Sep 2014 07:52
Last Modified:	03 Sep 2014 07:52
URI:	http://eprints.iisc.ac.in/id/eprint/49719

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