Niobates are promising all-climate Li⁺-storage anode material due to their fast charge transport, large specific capacities, and resistance to electrolyte reaction. However, their moderate unit-cell-volume expansion (generally 5%–10%) during Li⁺ storage causes unsatisfactory long-term cyclability. Here, “zero-strain” NiNb₂O₆ fibers are explored as a new anode material with comprehensively good electrochemical properties. During Li⁺ storage, the expansion of electrochemical inactive NiO₆ octahedra almost fully offsets the shrinkage of active NbO₆ octahedra through reversible O movement. Such superior volume-accommodation capability of the NiO₆ layers guarantees the “zero-strain” behavior of NiNb₂O₆ in a broad temperature range (0.53%//0.51%//0.74% at 25// − 10//60 °C), leading to the excellent cyclability of the NiNb₂O₆ fibers (92.8%//99.2% // 91.1% capacity retention after 1000//2000//1000 cycles at 10C and 25// − 10//60 °C). This NiNb₂O₆ material further exhibits a large reversible capacity (300//184//318 mAh g⁻¹ at 0.1C and 25// − 10//60 °C) and outstanding rate performance (10 to 0.5C capacity percentage of 64.3%//50.0%//65.4% at 25// − 10//60 °C). Therefore, the NiNb₂O₆ fibers are especially suitable for large-capacity, fast-charging, long-life, and all-climate lithium-ion batteries.

铌酸盐由于其快速的电荷传输、大的比容量和耐电解液反应而成为有前景的全气候储^锂负极材料。然而，Li ⁺存储过程中它们的单位电池体积适度膨胀（通常为 5%–10%），导致长期循环性能不理想。本文探索了“零应变”NiNb ₂ O ₆纤维作为一种具有综合良好电化学性能的新型负极材料。在Li ⁺存储过程中，电化学不活泼的NiO ₆八面体的膨胀几乎完全通过可逆的O运动抵消了活性NbO ₆八面体的收缩。 NiO ₆层如此出色的体积调节能力保证了 NiNb ₂ O ₆在较宽温度范围内的“零应变”行为（0.53%//0.51%//0.74% at 25// − 10//60 ° C)，导致 NiNb ₂ O ₆纤维具有出色的循环性能（在 10C 和 25// − 10//60 °C 下循环 1000//2000//1000 次后容量保持率为 92.8%//99.2% // 91.1%） ）。该NiNb ₂ O ₆材料还表现出大的可逆容量（在0.1C和25// − 10//60 °C时为300//184//318 mAh g ^-1 ）和出色的倍率性能（10至0.5C容量百分比） 64.3%//50.0%//65.4% (25// − 10//60 °C)。因此，NiNb ₂ O ₆纤维特别适合大容量、快充、长寿命、全气候的锂离子电池。