Figure 12.

Schematic of a fiber‐shaped IECSS based on multi‐type of energies comprising of a nanogenerator, solar cell and supercapacitor. ZnO NWs are grown on a flexible thin plastic wire coated with thin Au film. High‐quality conductive and transparent graphene on Cu mesh were used as electrodes for each energy devices. For solar cell, and supercapacitor, the corresponding electrolytes were filled in between ZnO NWs and graphene electrodes. a) SEM image of a graphene film. b) Raman spectra of the graphene film. c) Low resolution SEM image of Au‐coated plastic wire covered with ZnO NW arrays. The inset is a SEM image of the plastic wire showing ZnO NW arrays grown along the radial direction. Reproduced with permission.70