Improvement of Lithium Storage Performance of Molybdenum Trioxide by a Synergistic Effect of Surface Coating and Oxygen Vacancies

3D hierarchical flower‐like carbon coated MoO 3− x nanosheets (denoted as MoO 3− x NS@C) have been successfully fabricated by a simple hydrothermal method. When used as anode for Li‐ion batteries, the MoO 3− x NS@C electrode exhibits excellent cycle performance and outstanding rate capabilities. The charge capacity can reach 1025 mAh g −1 over 150 cycles, and 62% of the charge capacity is retained when the current density increases to 2000 mA g −1 . The improved lithium storage performance of MoO 3− x NS@C is attributed to the synergistic effect of oxygen vacancies and the carbon coating, which not only enhance the electric conductivity and Li‐ion diffusion coefficient but also lead to superior structural stability and cyclability of the MoO 3− x NS@C electrode during repeated lithiation/delithiation process.