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- W3214223886 abstract "Porous graphene thin sheets (p-Gr) doped with nitrogen are prepared from graphene oxide (GO) by using ammonium sulfate ((NH4)2SO4) as dynamic gas template. The obtained samples are characterized by SEM, TEM, XRD, XPS, Raman, and N2 adsorption-desorption. Furthermore, the influence of different (NH4)2SO4 dosages on the electrochemical performance of the corresponding samples is investigated. Compared with the un-activated graphene (Gr) (SBET=70.5 m2/g), the resultant p-Gr-40 possesses higher specific surface area (SBET=267.3 m2/g), more abundant porous structure, and much better capacitive performance. The specific capacitance of p-Gr-40 (Cm=139.2 F/g) is much larger than that of Gr (Cm=56.5 F/g) at a current density of 1 A/g in the three-electrode supercapacitor system. Meanwhile, p-Gr-40 owns an energy density of 12.98 Wh k/g at the power density of 160.03 W/kg in the two-electrode supercapacitor system. Also, the initial capacity retention of p-Gr-40 is nearly 100% even after 10 000 charge-discharge cycles at 1 A/g, demonstrating its excellent cyclic stability. The enhanced electrochemical performance is contributed by the porous structure and heteroatoms doping (such as nitrogen)." @default.
- W3214223886 created "2021-11-22" @default.
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- W3214223886 date "2020-04-10" @default.
- W3214223886 modified "2023-09-28" @default.
- W3214223886 title "Preparation, Characterization and Capacitive Properties of Porous Graphene Thin Sheets Doped with Nitrogen" @default.
- W3214223886 doi "https://doi.org/10.3969/j.issn.1003-0972.2020.02.015" @default.
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