Carbon anode materials for Li-ion batteries have been operated close to their theoretical rate and cycle limits. Therefore, titanium-based materials have attracted great attention due to their high stability. Here, Na₂Li₂Ti₆O₁₄ nanofibers as anode materials were prepared through a controlled electrospinning method. The Na₂Li₂Ti₆O₁₄ nanofibers presented superior electrochemical performance with high rate capability and long cycle life and can be regarded as a competitive anode candidate for advanced Li-ion batteries. One-dimensional (1D) Na₂Li₂Ti₆O₁₄ nanofibers are able to deliver a capacity of 128.5 mA h g⁻¹ at 0.5C, and demonstrate superior high-rate charge–discharge capability and cycling stability (the reversible charge capacity is 77.8 mA h g⁻¹ with a capacity retention of 99.45% at the rate of 10C after 800 cycles). The 1D structure is considered to contribute remarkably to increased rate capability and stability. This simple and scalable method indicates that the Na₂Li₂Ti₆O₁₄ nanofibers have a practical application potential for high performance lithium-ion batteries.

中文翻译：

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一维Na ₂ Li ₂ Ti ₆ O ₁₄纳米纤维的可扩展合成作为锂离子电池的超高倍率阳极†

用于锂离子电池的碳负极材料已接近其理论速率和循环极限运行。因此，钛基材料由于其高稳定性而引起了极大的关注。在此，通过受控电纺丝法制备了作为阳极材料的Na ₂ Li ₂ Ti ₆ O ₁₄纳米纤维。Na ₂ Li ₂ Ti ₆ O ₁₄纳米纤维具有优异的电化学性能，高倍率能力和长循环寿命，可以被视为高级锂离子电池的竞争性阳极候选材料。一维（1D）Na ₂ Li ₂ Ti ₆ O_14根纳米纤维能够在0.5C的温度下提供128.5 mA hg ^-1的容量，并显示出卓越的高速率充放电能力和循环稳定性（可逆充电容量为77.8 mA hg ^-1，在90°C时的容量保持率为99.45％。 800次循环后10C的速率）。一维结构被认为对增加速率能力和稳定性做出了显着贡献。这种简单且可扩展的方法表明，Na ₂ Li ₂ Ti ₆ O ₁₄纳米纤维具有高性能锂离子电池的实际应用潜力。