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Int. J. Electroactive Mater. 1 (2013) 55-59

Electrochemical Analyses of Carbon Nanotube Based Supercapacitor in 1 M LiPF6 Organic Electrolyte

Mohd Asyadi Azam1*, Mohamad Firdaus Rosle2

1Engineering Materials, Fac. of Manufacturing Engineering, UTeM, Melaka, Malaysia, Melaka, Melaka, Malaysia
2Advanced Materials Research Centre (AMREC), SIRIM Berhad, Kulim, Kedah, Malaysia

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Abstract : Excellent electrical conductivity, high mesoporosity, and high electrolyte accessibility of carbon nanotube (CNT) ensure a high charge transport capability and hence a high power density for the capacitor. However, performance of the supercapacitors should be improved to satisfy the increasing demands for various applications. For example, studies of active materials to have appropriate balance between the surface area and porosity have been a bottleneck to the progress of supercapacitors, especially the electrochemical double layer capacitor (EDLC). In this article, commercial CNT was used as active material and a non-aqueous solution, LiPF6 was used as electrolyte to fabricate electrodes for EDLC-type supercapacitor. Electrochemical measurements such as BET N2 adsorption-desorption analysis and cyclic voltammetry (CV) were performed to determine the capacitance behavior of the device. As results, specific surface area of the CNTs was found to be 609 m2 g-1, and specific capacitance calculated from the CV measurement was 42 F g-1.

Keywords : CNT based supercapacitor,LiPF6 electrolyte,BET surface area,Electrode fabrication,Specific gravimetric capacitance,