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Novel porous carbon nanosheet derived from a 2D Cu-MOF: Ultrahigh porosity and excellent performances in the supercapacitor cell
Ist Teil von
Carbon (New York), 2019-04, Vol.144, p.540-548
Ort / Verlag
New York: Elsevier Ltd
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In this work, a novel Cu-MOF of translational 2D (4,4) layers has been designed and afforded as hierarchically stacking lamellae with interspace. Cu-MOF is initially employed as precursors to prepare the Cu@C composite through calcination-thermolysis procedure. Then Cu@C is etched with HCl, and subsequently activated by KOH to obtain APC with nanosheet morphology, which shows ultrahigh BET specific surface area (2491 m2 g−1) and pore volume of 1.50 cm3 g−1 (Vmirco = 0.12 cm3 g−1, Vmeso+macro = 1.38 cm3 g−1). Significantly, the APC nanosheet owns outstanding specific capacitance of 260.5 F g−1 at 0.5 A g−1 under a load of 8 mg/cm2. SSC based on APC achieves excellent specific energy density of 18.38 W h Kg−1 at specific power density of 350 W kg−1. Our SSC still retains 91.1% of original capacitance after 5000 cycles, exhibiting remarkable long-term cycle and reversibility. Amazingly, a red LED can be lighted up by three SSCs over 12 min. Therefore, the APC nanosheet is a competitive and promising candidate for preparing supercapacitor cells.
One novel 2D Cu-MOF is employed as a precursor to prepare the APC nanosheet with interspace through the calcination-thermolysis strategy, which presents ultrahigh BET specific surface area and excellent supercapacitance. Furthermore, SSC based on the APC nanosheet shows remarkable energy density under high power density, and a red LED can be lighted up by three SSCs over 12 min. [Display omitted]