Flexible energy devices with high energy density and long cycle life are considered to be
promising applications in portable electronics. In this study, silicon/carbon nanofiber (Si@
CNF) core–shell electrode has been prepared by the coaxial electrospinning method. The
precursors of polyimide (PI) were for the first time used to form the core–shell structure of
Si@ CNF, which depicts outstanding flexibility and mechanical strength. The effect of doping
concentrations of silicon (Si) nanoparticles embedded in the fiber is investigated as a binder …