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.

中文翻译：

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Ti ⁴⁺掺杂的Li ₃ VO ₄作为锂离子电池的阳极，具有增强的电导率和结构稳定性

隧道型Li ₃ VO ₄（LVO）由于其大容量，低成本和安全的潜力，已成为一种很有前途的锂离子电池负极材料。但是，LVO的导电性差，限制了其广泛的应用范围。在此，LVO通过固态合成法在各式（LTVO）中掺杂有0.05单位的Ti ⁴⁺，以提高其导电性和结构稳定性。用Ti ⁴⁺部分取代V ⁵⁺会导致在MO ₄（M = Li，V）四面体之间的八面体中形成额外的填隙Li ⁺离子，从而改善Li ⁺离子扩散动力学。所得的LTVO电极在20 mA g ^–1时显示出约376 mAh g ^–1的高放电/充电容量。在1000 mA g ^–1时，可以在500个循环中获得良好的循环稳定性，且极化很小。这使其成为锂离子电池的有希望的阳极。