In this study,s amples of activated mesoporous carbon are fabricated with pore structures with cylinder and gyroid nanostructures through the templatinge ffect of amphiphilic poly(ethylene oxide-block-caprolactone)( PEO-PCL) and by using specific resol/PEO-PCL weightr atios (e.g., 60:40 for cylinders;5 5:45 for gyroids). After carbonization and KOH activation, the activated mesoporous carbons were tested as electrode materials for electric double-layerc apacitor (EDLC)s upercapacitors. The electrochemical properties were examined by using three-electrode (6 m KOH (aq) as electrolyte) and CR2032c oin-cell (1 m tetraethylammonium tetra-fluoroborate (TEABF 4 )/CN as the electrolyte) systems. The gyroid carbon samples provided specific capacitances higher than those of the cylinder carbon samples in both aqueous and organic systems:1 55 Fg À1 compared with 135 Fg À1 in 6 m KOH (aq) ,a nd 105.6 compared with 96 Fg À1 in 1 m TEABF 4 / MeCN, after 100 charge/discharge cycles. It is suspected that the bi-continuous mesochannels of the gyroid-type activated mesoporousc arbonsp rovided ar elatively higher effective adsorption surfacea rea;i no ther words, the greater surface area for energy storageo riginated from am oderate pore size and an interconnected pore structure.[a] Dr.
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