| 초록 |
Co(OH)2 architectures were produced on carbon cloth via electrodeposition at different voltage scan rates (5 to 20 mV s-1) using three electrode system. In addition, polypyrrole (PPy) were coated on Co(OH)2 architectures via vapor phase deposition (VDP) which facilitated uniform and thin coating. Then, solid-state asymmetric supercapacitor was assembled by using PPy coated Co(OH)2/carbon cloth composites (Co(OH)2@PPy) as a positive electrode and activated carbon nanotubes decorated carbon cloth as a negative electrode. Fabricated device was operated in a 1.6 V voltage window and was capable of delivering a high volumetric capacitance of 27.4 F cm-3, energy density of 10.53 mWh cm-3 and power density of 0.53 W cm-3. In addition, the supercapacitor device displayed outstanding cycle stability owing to the PPy coating layer on Co(OH)2 surface. |
