INFLUENCE OF PORE STRUCTURE ON THE ELECTROCHEMICAL PERFORMANCE OF ACTIVATED CARBON AS ELECTRODE MATERIAL FOR AQUEOUS SUPERCAPACITORS
Three activated carbon materials with different pore characteristics were prepared. The relationship between the electrochemical performances and the pore characteristics of the obtained carbons as electrode material for supercapacitors was elucidated. The results show that three carbon materials have almost equal specific-surface-area capacitance of 0.12 F ⋅ m-2. The energy density depends largely on the carbon surface area whereas the power density depends not only on the surface area, but also on the pore size and pore size distribution. The carbon sample with a BET surface area of 2000 m2 ⋅ g-1 and multimodal peak pore systems consisting of micropores at 1.5 nm and mesopores at about 3.8 nm exhibits excellent power density of 1662 W kg-1.