Abstract
Tunnel-type Li3VO4 (LVO) has become of great interest as a promising anode material for lithium-ion batteries owing to its large capacity, low cost, and safe potentials. However, the poor conductivity of LVO limits its wide applications. Here, LVO was doped with 0.05 unit of Ti4+ in each formula (LTVO) via a solid-state synthetic method to increase its conductivity and structural stability. The partial replacement of V5+ with Ti4+ leads to formation of additional interstitial Li+ ions in the octahedrons between MO4 (M = Li, V) tetrahedrons and hence improves Li+ ion diffusion kinetics. The resultant LTVO electrode exhibits a high discharge/charge capacity of ∼376 mAh g–1 at 20 mA g–1. Good cycling stability over 500 cycles with small polarization is achieved at 1000 mA g–1. This makes it a promising anode for Li-ion batteries.
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