General synthesis and electrochemical performance of TiO2-based microspheres with core-shell structure

► TiO2-based composite microspheres with a core-shell structure are successfully fabricated via facile one-step hydrothermal route. ► The as-prepared composite microspheres are spherical aggregates assembled with primary TiO2 nanocrystallites and show an organized mesoporous structure. ► The as-prepared Poly(3,4-ethylenedioxythiophene)/TiO2 microspheres present a good discharge and cycle performance at the high current density.