fig5

Figure 5. (A) A photograph of a distorted graphene fiber. (B) SEM images of as-prepared graphene fiber. (C) Cross-section view of a graphene fiber showing the core graphene network surrounded by standing graphene sheets. (D) Schematic illustration of a wire-shaped supercapacitor fabricated from two twined graphene fibers with a polyelectrolyte. (E, F) Photographs of fiber supercapacitor in free and bending states. (G, H) Photographs of the textile embedded with two graphene fiber supercapacitors in flat and bending states, respectively^[86].