Fig. 3 Performance of the solid wire supercapacitors of 3D graphene-CNT fiber for energy storage. Performance of the solid wire supercapacitors of 3D graphene-CNT.

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Presentation transcript:

Fig. 3 Performance of the solid wire supercapacitors of 3D graphene-CNT fiber for energy storage. Performance of the solid wire supercapacitors of 3D graphene-CNT fiber for energy storage. (A and B) SEM images of the top and cross-section of the solid-state wire supercapacitor based on the 3D graphene-RACNT fiber electrodes (the diameter of the fiber is 100 μm). (C) CV curves of the solid-state wire supercapacitor based on the 3D graphene-RACNT wire electrodes at scanning rates from 100 to 500 mV/s. (D) Galvanostatic charge and discharge curves of the 3D graphene-RACNT wire capacitor at different currents. (E) Surface-specific capacitance of the 3D graphene-RACNT wire electrode calculated from the galvanostatic charge/discharge curves. (F to L) Integrated solid wire supercapacitors either in series or in parallel (the diameter of the fibers used in integrated devices is 380 μm). (F) Schematic representation of an integrated supercapacitor in series from three graphene-RACNT wire supercapacitors. (G and H) Galvanostatic charge-discharge curves and CV curves, respectively, for the series integrated graphene-RACNT wire supercapacitor and a single wire supercapacitor. (I) Use of an integrated supercapacitor to light up a commercial LED. (J) Schematic representation of an integrated supercapacitor in parallel from three graphene-RACNT wire supercapacitors. (K and L) Galvanostatic charge-discharge curves and CV curves, respectively, for the parallel integrated graphene-RACNT wire supercapacitor and a single wire supercapacitor. Yuhua Xue et al. Sci Adv 2015;1:e1400198 Copyright © 2015, The Authors