| 초록 |
Monolithic carbon xerogels were prepared for supercapacitor electrode from resorcinol (R) and formaldehyde (F) in distilled water (W) via one-step, catalyst-free hydrothermal reaction in a Teflon mold. The reaction was carried out at 100 ℃ for 6 h, while the R/F and R/W ratios were varied to afford co-continuous pore structure. For comparison, mildly oxidized graphene (MOG) was added to RF sometimes to enhance the electrical conductivity. The gels were then subjected to pyrolysis at 900 ℃ for 2 h, followed by CO2, KOH and/or H3PO4 activation. Next, the gels were cut into a disk (~1mm thickness) and specific capacitance was measured via cyclic voltammetry. In addition, the gels were also characterized by SEM and N2 adsorption-desorption measurements. |
