Synthesis and lithium intercalation properties of Li₃VO ₄ as a new anode material for secondary lithium batteries

Lithium intercalation properties of Li₃VO₄ are investigated for a possible application as a new anode material for lithium-ion batteries. A single phase Li₃VO₄ powders are successfully synthesized in an oxygen atmosphere by a two-step heating process and solution-based method. A structure with cornershared VO₄ and LiO ₄ tetrahedrons can reversibly intercalate lithium ions and exhibits a stable frame structure after cycling. The average discharge potential is lower than Li₄Ti₅O₁₂. While the sample obtained from the solid-state reaction shows initial instability and stabilizes by the continuous cycling, the sample synthesized by precipitation exhibits excellent cyclability. 190 mAh g-1 of charge capacity is observed after 100th cycle at 1.0 C-rate.