Science Advances

Supplementary Materials

This PDF file includes:

  • Fig. S1. Photographs of aluminum wire, AAO wire, and 3D graphene-RACNT deposited on the AAO wire.
  • Fig. S2. SEM images of the cross-section view of the 3D graphene-RACNT fiber after the removal of the aluminum and AAO template under different magnifications.
  • Fig. S3. TEM image of the edge of the 3D graphene-RACNT fiber with different magnifications.
  • Fig. S4. Top view TEM images of the center of the 3D graphene-RACNT fiber with different magnifications.
  • Fig. S5. TEM images of the side of the 3D graphene-RACNT fiber rotated with different angles from −19° to 30° around the red arrow.
  • Fig. S6. TEM images of an individual carbon nanotube from the 3D graphene-RACNT fiber under different magnifications.
  • Fig. S7. Raman spectrum of the 3D graphene-RACNT fiber on the AAO wire.
  • Fig. S8. The XPS survey spectrum of the 3D graphene-RACNT fiber, and the corresponding high-resolution XPS C1s spectrum.
  • Fig. S9. The resistance of the as-prepared 3D graphene-RACNT wire.
  • Fig. S10. CV curves and galvanostatic discharge curves of the 3D graphene-RACNT wire (0.1 mm in diameter) electrode in 1 M H2SO4 solution.
  • Fig. S11. SEM images of the 3D graphene-RACNT wire (100μm in diameter) with different shell thicknesses via anodizing at different times.
  • Fig. S12. CV curves of the fiber-100μm-2hrs, fiber-100μm-4hrs, and fiber-100μm-12hrs in 5 mM K3Fe(CN)6/0.1 M KCl solution.
  • Fig. S13. CV curves, galvanostatic charge and discharge curves, and the surface specific capacitance of the 3D graphene-RACNT wire electrodes (fiber-100μm-2hrs, fiber-100μm-4hrs, and fiber-100μm-12hrs).
  • Fig. S14. Photographs of the 3D graphene-RACNT fibers prepared from aluminum wire with different diameters.
  • Fig. S15. SEM images of the 3D graphene-RACNT fibers prepared from aluminum wires with different diameters.
  • Fig. S16. CV curves and Nyquist plots of the 3D graphene-RACNT fibers with a diameter.
  • Fig. S17. CV curves of the solid-sate wire supercapacitor at high scanning rates, and galvanostatic charge and discharge curves of the 3D graphene-VACNT wire capacitor at high current density.
  • Fig. S18. Photograph, CV curves, galvanostatic charge and discharge curves, and the surface specific capacitance and length specific capacitance of the solid-state wire supercapacitor based on the 3D graphene-RACNT fiber electrodes (810 mm in diameter).
  • Fig. S19. The long term stability and bending stability tests for the supercapacitor based on the 3D graphene-RACNT electrodes with diameter of 100μm.
  • Fig. S20. Photographs, CV curves, and galvanostatic charge/discharge curves of the 3D graphene-RACNT wire supercapacitor before and after rolling on a glass tube.
  • Fig. S21. Photographs of graphene-RACNT wire supercapacitor weaved into a piece of fabric and rolling over a stick, and its CV curves and galvanostatic charge/discharge curves before and after rolling on a stick.
  • Fig. S22. SEM images of TiO2 nanotube/Ti wire.
  • Fig. S23. SEM images of a 3D graphene-RACNT flexible wire DSSC before and after bend.
  • Fig. S24. Schematics of Al2O3 template with a filleted hole in the center, and MD model of the template.
  • Fig. S25. Schematics of CNT-graphene junction.
  • Fig. S26. Side view and cross section of three-layered CNT-graphene junctions with 135° fillet and without fillet.
  • Fig. S27. Normalized bending energy predicted by the analytical model, and normalized potential energy calculated by MD as a function of the fillet angles.
  • Table S1. The reported areal capacitance and length capacitance of the fiber supercapacitor in references.
  • Table S2. Jsc, Voc, FF, and power conversion efficiency for wire-shaped DSSCs with the 3D graphene-CNT fiber, and Pt wire as the counter electrode.
  • Table S3. Electroactive surface areas of the 3D graphene-RACNT fiber electrodes.
  • Table S4. Series resistance of the 3D graphene-RACNT fiber electrodes. Table S5. Jsc, Voc, FF, and power conversion efficiency for wire-shaped DSSCs with the 3D graphene-CNT fiber before and after bend.

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Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.avi format). A movie made from those consequent TEM images, showing the seamless 3D junction structure between the CNTs and the graphene sheet.
  • Movie S2 (.avi format). A movie made from those consequent TEM images, revealing the aligned CNT bundles (see text) and their seamless junction with the graphene sheet.

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