Complex investigation of charge storage behavior of microporous carbon synthesized by zeolite template
By Stojmenovi?, Marija; Vujkovi?, Milica; Matovi?, Ljiljana; Krsti?, Jugoslav; ?uki?, An?elka; Dodevski, Vladimir;
Published in Microporous and Mesoporous Materials
NULL
2016
Abstract
Abstract Microporous zeolite templated carbon (ZTC) was synthesized by impregnation method using zeolite Y (Na-form) as a template, and furfuryl alcohol as a carbon precursor. The characterization was carried out by X-ray diffractometry, Raman spectroscopy, scanning electron microscopy, nitrogen physisorption, elemental analysis and electrochemical methods. Physisorption measurements evidenced high micropore volume of obtained material (?0.43 cm3 g?1). The charge storage ability in aqueous KOH, {H2SO4} and Na2SO4 solutions was systematically studied by cyclic voltammetry, galvanostatic charging/discharging and complex impedance measurements. Specific coulombic capacitance, the hydrogen storage, {HZTC} bonding and relaxation time of adsorption were found to be dependent on the type of electrolyte. Neutral Na2SO4 aqueous solution was found to be the best for supercapacitor application, thanks to: i) the highest available voltage window ii) lowest corrosion and iii) highest capacitance amounting to 123 F g?1 at 1 A g?1.
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