Orthorhombic γ-LiV₂O₅ as Cathode Materials in Lithium Ion Batteries: Synthesis and Property

The rod-like and bundle-like γ-LiV₂O₅ were synthesized via a simple solvothermal process-ing. The rod-like γ-LiV₂O₅ with diameter of 500-800 nm and the bundle-like architectures are composed of several of order-attached rods with diameter of 100-600 nm. γ-LiV₂O₅ were synthesized using LiOH·H₂O, NH₄VO₃, HNO₃, C₂H₅OH without and with PVP as raw materials. At the same time, the actual formation mechanism of γ-LiV₂O₅ was also investigated. As the cathode materials for lithium ion batteries, the bundle-like γ-LiV₂O₅ prepared with PVP delivers a better electrochemical performance, which has an initial dis-charge capacity of 269.3 mAh/g at a current density of 30 mA/g and is still able to achieve 228 mAh/g after the 20th cycle. The good electrochemical properties of the as-synthesized γ-LiV₂O₅ coupled with the simple, relatively low temperature, and low cost of the prepara-tion method may make this material a promising candidate as a cathode material for lithium ion batteries.