Synthesis of porous hollow spheres Co@TiO 2-x -carbon composites for highly efficient lithium-ion batteries

Abstract

The hollow TiO2 anode material has received great attention for next-generation LIBs because of its excellent stability, environmental friendly, and low volume change during lithiation/delithiation. Nevertheless, the current anatase TiO2 anode materials are unable to be energy storage system owing to low lithium ion diffusivity and poor reversible theoretical capacities. The introduction of defects has been turned out to be a significant and effective method to improve electronic conductivity, especially oxygen vacancies (OVs). In this paper, a facile hydrothermal reaction and subsequent chemical vapor deposition method were successfully used to fabricate Co@TiO2-x-carbon hollow nanospheres. These results suggest that the synthesized product exhibits good rate performance and superior cycling stability.