Perpustakaan Digital ITB

Metal?organic frameworks (MOFs) have attracted intensiveattention for high-performance supercapacitors owing to their large specificsurface area and tunable pore structure. Herein, ultrathin NiCo-MOF nanosheetsare fabricated by a facile ultrasonication at room temperature and employed as asupercapacitor electrode material. The unique nanosheet-like structure of NiCo-MOF provides more electroactive sites and a shorter pathway for electrontransfer and electrolyte diffusion, resulting in excellent electrochemicalperformance with a high specific capacitance of 1202.1 F g?1at 1 A g?1.Inaddition, an asymmetric supercapacitor of NiCo-MOF//activated carbon wasassembled in 2 M KOH electrolyte. It delivers an energy density of 49.4 W hkg?1at a power density of 562.5 W h kg?1in a voltage window of 1.5 V. Theresults demonstrate a new method to fabricate ultrathin MOF nanosheets forhigh-performance supercapacitor electrode materials