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High Surface Area Activated Carbon from Rice Husk as a High Performance Supercapacitor Electrode

Ellie Yi, Lih Teo and Lingeswarran, Muniandy and Eng, Poh Ng and Farook, Adam and Abdul Rahman, Mohamed and Rajan, Jose and K. F., Chong (2016) High Surface Area Activated Carbon from Rice Husk as a High Performance Supercapacitor Electrode. Electrochimica Acta, 192. pp. 110-119. ISSN 0013-4686

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Abstract

In this study, we report on the application of high surface area activated carbon (AC) derived from rice husks as a supercapacitor electrode. The prepared AC was free from Brønsted or Lewis acid sites, thus making the electrical double layer capacitance as the main charge storage mechanism. Three samples of AC with different surface areas were prepared at different activation temperatures and studied electrochemically using cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. All AC samples exhibited good electrochemical performance as supercapacitor electrode. The maximum specific capacitance (147 F g−1) was obtained by the AC sample (surface area of 2696 m2 g−1) which was prepared at an activation temperature of 850 °C. Detailed impedance studies revealed the low resistivity (0.23 Ω) of AC sample and the fast frequency response (0.11 s) of the supercapacitor electrode.

Item Type: Article
Uncontrolled Keywords: Biowaste; energy storage; supercapacitors; electrochemistry; activated carbon
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 19 Feb 2016 07:47
Last Modified: 08 Feb 2018 01:53
URI: http://umpir.ump.edu.my/id/eprint/11871
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