Electrochemical Properties of Carbon from Oil Palm Kernel Shell for High Performance Supercapacitors

Rajan, Jose and Izan Izwan, Misnon and Nurul Khairiyyah, Mohd Zain and Radhiyah, Abd Aziz and Baiju, Vidyadharan (2015) Electrochemical Properties of Carbon from Oil Palm Kernel Shell for High Performance Supercapacitors. Electrochimica Acta, 174. pp. 78-86. ISSN 0013-4686. (Published)

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DOI/Official URL: http://dx.doi.org/10.1016/j.electacta.2015.05.163

Abstract

Electrochemical properties of activated carbon (AC) derived from oil palm kernel shell (PKS) are evaluated and compared with other biomass derived AC for fabricating high performance electrochemical double layer capacitors (EDLC). Cleaned PKS are carbonized by pyrolysis and subsequently activated by physical and chemical methods. The chemically AC show a wider pore distribution (1.49.3 nm) whereas the physically activated one has uniform pores (1.5 nm). The electrochemical properties of the two types of AC are evaluated using cyclic voltammetry (CV), charge–discharge cycling (CDC) and electrochemical impedance spectroscopy (EIS) in three-electrode configuration. High specific capacitance (CS) (210 F g-1 in 1 M KOH electrolyte at 0.5 A g-1) is obtained for chemically AC whereas the CS for the physically AC is 50% lower (123 F g-1). Galvanostatic CDC tests show that the electrodes maintained ~ 9597% of CS after 1000 cycles. The EIS revealed that the PKS AC has low series resistance (< 0.6 ) and relaxation time (~0.69 s) which would therefore offers high power density in the EDLC devices.

Item Type:	Article
Uncontrolled Keywords:	Amorphous materials; Supercapacitors; Pseudocapacitors; Energy storage
Subjects:	Q Science > QC Physics Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division:	Faculty of Industrial Sciences And Technology
Depositing User:	Prof. Dr. Jose Rajan
Date Deposited:	11 Jun 2015 02:08
Last Modified:	21 Nov 2017 02:03
URI:	http://umpir.ump.edu.my/id/eprint/9308
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