Figure 7.

(a) Schematic diagram showing the hierarchical structure of CF yarn@carbon nanofiber (CNF) @PANI nanowire array; (b) SEM image of CF yarn@CNF; (c) SEM image of CF yarn@CNT@PANI nanowire array; (d) electrochemical performance at different current densities pertaining to different samples; (e) CV curves of different samples under different bending angles, with 0°, 90°, and 180° at scan rate of 20 mV s⁻¹. Reproduced with permission from Reference [87], copyright Elsevier, 2018. (f) SEM image of pristine CNT fiber; (g) SEM image of CNF/CNT/PANI; (h) areal specific capacitances of CNF-, CNF/CNTs-, CNF/PANI-, CNF/CNT/PANI-supercapacitors at different current densities. Reproduced with permission from Reference [73], copyright Elsevier, 2018.