Synthesis of cobalt-doped V2O3with a hierarchical yolk–shell structure for high-performance lithium-ion batteries

Co-V₂O₃-24 yolk–shell nanospheres were synthesizedviaa solvothermal treatment and subsequent calcination. The electrochemical performance of Co-V₂O₃-24 is greatly improved because of Co-doping and the novel hierarchical yolk–shell structure.