OPEN ACCESS
In this study, bio-wastes from durian fruits such as seeds and shells have been used as precursor materials to prepare activat-ed carbon (AC). While the applicability of a one-step method of impregnation-activation has been investigated for the activation of durian shells, a two-step method of carbonization-impregnation-activation has been tried for the durian seeds. Durian shells based AC (DSh-AC) was found to have a BET surface area (SBET) of 2004 m2 g-1 and the durian seeds based AC (DS-AC) had SBET of 1176 m2 g-1. A new ap-proach to electrical double-layer capacitor (EDLC) fabrication has been attempted to avoid the use of polymer binders and organic sol-vents in the electrodes by coating the electrode material directly on the separator. Instead of coating onto metal current collector, the AC was coated on a glass microfiber filter which was used as the separator to form the electrode. As an electrode material in the EDLC, DSh-AC performed well with a specific capacitance (CSC) between 72 and 82 F g-1 whereas the DS-AC showed lower values of CSC between 64 and 70 F g-1. The reasonable good results indicate that the simple approach of device fabrication can also produce EDLCs with satisfacto-ry performance parameters.
durian; bio-waste; activated carbon; electrode material; electric double-layer capacitor
This study is financially supported by University of Malaya Re-search Grant (UMRG) No. RG223-12AFR and Postgraduate Re-search Fund (PPP) No. PV094-2012A.
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