M–Nb–O compounds are regarded as advanced anode materials of lithium-ion batteries owing to their large capacities, high safety and fast Li⁺ transport. However, challenges remain in the exploitation of new M–Nb–O compounds with low strains to enable superior cyclability. Here, we exploit V₃Nb₁₇O₅₀ as a low-strain M–Nb–O anode compound, and V₃Nb₁₇O₅₀ micron-sized particles (V₃Nb₁₇O₅₀-MP) and submicron-sized rods (V₃Nb₁₇O₅₀-SR) are demonstrated. V₃Nb₁₇O₅₀ owns an open and robust shear ReO₃ crystal structure, which is constructed by 3 ​× ​3 ​× ​∞ (V,Nb)O₆ octahedron-blocks linked by VO₄ tetrahedra. The resulting A–B–A layered structure with a large interlayer spacing enables the superior Li⁺ diffusivity and significant intercalation-pseudocapacitive behavior in V₃Nb₁₇O₅₀. The maximum unit-cell volume expansion of V₃Nb₁₇O₅₀ discharged to 0.8 ​V is only 3.46% (the smallest value among the known M–Nb–O anode compounds with shear ReO₃ structures), leading to the excellent cyclability of V₃Nb₁₇O₅₀-MP/V₃Nb₁₇O₅₀-SR with 90.0/91.8% capacity retention over 2000 cycles at 10C. V₃Nb₁₇O₅₀-MP/V₃Nb₁₇O₅₀-SR further exhibits a safe operating potential of 1.736/1.724 ​V, large reversible capacity of 207/254 ​mA ​h g⁻¹ at 0.1C, and high rate performance with 68/123 ​mA ​h g⁻¹ at 10C. A LiMn₂O₄//V₃Nb₁₇O₅₀-SR full cell also exhibits comprehensively good electrochemical properties, including excellent cyclability with 85.7% capacity retention over 500 cycles at 5C. Therefore, V₃Nb₁₇O₅₀ can be a very promising anode compound for stable, safe, large-capacity and fast-charging Li⁺ storage.

M–Nb–O化合物由于容量大，安全性高和Li ^+的快速运输而被视为锂离子电池的高级负极材料。但是，在开发新的低应变M–Nb–O化合物以实现出色的可循环性方面仍然存在挑战。在这里，我们利用V ₃ Nb ₁₇ O ₅₀作为低应变M–Nb–O阳极化合物，以及V ₃ Nb ₁₇ O ₅₀微米大小的颗粒（V ₃ Nb ₁₇ O ₅₀ -MP）和亚微米大小的棒（ V ₃ Nb ₁₇ O ₅₀ -SR）被证明。V ₃ Nb ₁₇ O₅₀具有开放且坚固的剪切ReO ₃晶体结构，该结构由VO ₄四面体连接的3×3×∞（V，Nb）O ₆八面体块构成。所得的具有较大层间间距的A–B–A层状结构可在V ₃ Nb ₁₇ O _50中实现出色的Li ⁺扩散性和显着的嵌入-伪电容行为。放电至0.8 V的V ₃ Nb ₁₇ O ₅₀的最大晶胞体积膨胀仅为3.46％（在已知的具有剪切ReO ₃结构的M–Nb–O阳极化合物中是最小值），从而导致出色的循环性V₃ Nb ₁₇ O ₅₀ -MP / V ₃ Nb ₁₇ O ₅₀ -SR在10C的2000个循环中具有90.0 / 91.8％的容量保持率。V ₃ Nb ₁₇ O ₅₀ -MP / V ₃ Nb ₁₇ O ₅₀ -SR还表现出1.736 / 1.724 V的安全工作电势，0.1C时207/254 mA hg ^-1的大可逆容量和高速率性能在10C下为68/123 mA hg ^-1。LiMn ₂ O ₄ /// V ₃ Nb ₁₇ O ₅₀-SR全电池还具有综合良好的电化学性能，包括出色的循环性能，在5C下500次循环中的容量保持率为85.7％。因此，V ₃ Nb ₁₇ O ₅₀可以成为稳定，安全，大容量和快速充电的Li ⁺储存极有希望的负极化合物。