Surface‐Amorphous and Oxygen‐Deficient Li3VO4−δ as a Promising Anode Material for Lithium‐Ion Batteries

Surface-amorphous and oxygen-deficient Li3VO4−δsynthesized by simple annealing of Li3VO4 powders in a vacuum shows great enhancements in both reversible capacity and coulombic efficiency for the first discharge/charge without delicate size control and carbon coating. The results are associated with the improved charge-transfer kinetics caused by the amorphous surface of Li3VO4−δ.