Chemical oxidation is used to cut and unzip multi-walled carbon nanotubes in the transverse direction and the axial direction to form graphene oxide nanoribbon （GONR）. Ruthenium oxide/reduced graphene oxide nanoribb...Chemical oxidation is used to cut and unzip multi-walled carbon nanotubes in the transverse direction and the axial direction to form graphene oxide nanoribbon （GONR）. Ruthenium oxide/reduced graphene oxide nanoribbon composite （RuO2/rGONR） with a 72.5 wt% RuO2 loading is synthesized through an aqueous-phase reaction, in which GONR is served as starting material, followed by mild thermal treatment in ambient air. The resulting RuO2/rGONR composite achieves specific capacitance up to 677 F.g l at the current density of 1 A·g^-1 in three-electrode system using 1 mol·L^-1 H2SO4 as electrolyte. The resultant electrode exhibits an excellent rate capability （91.8% retention rate at 20 A·g^-1）. Especially, the symmetric supercapacitor assembled on the basis of RuO2/rGONR electrode delivers high energy density （16.2 Wh·kg^-1） even at the power density of 9885 W·kg^-1, which is very essential for supercapacitors.展开更多
基金Acknowledgement We gratefully acknowledge the financial support offered by the National Natural Science Foundation of China （Nos. 20963009 21163017 and 21563027） and Specialized Research Fund for the Doctoral Program of Higher Education（No. 20126203110001）.
文摘Chemical oxidation is used to cut and unzip multi-walled carbon nanotubes in the transverse direction and the axial direction to form graphene oxide nanoribbon （GONR）. Ruthenium oxide/reduced graphene oxide nanoribbon composite （RuO2/rGONR） with a 72.5 wt% RuO2 loading is synthesized through an aqueous-phase reaction, in which GONR is served as starting material, followed by mild thermal treatment in ambient air. The resulting RuO2/rGONR composite achieves specific capacitance up to 677 F.g l at the current density of 1 A·g^-1 in three-electrode system using 1 mol·L^-1 H2SO4 as electrolyte. The resultant electrode exhibits an excellent rate capability （91.8% retention rate at 20 A·g^-1）. Especially, the symmetric supercapacitor assembled on the basis of RuO2/rGONR electrode delivers high energy density （16.2 Wh·kg^-1） even at the power density of 9885 W·kg^-1, which is very essential for supercapacitors.
