Nanoporous Sn-doped TiO₂ (NP-TiO₂/Sn) composite is successfully fabricated by etching AlTiSn ternary alloy ribbons in NaOH solution at room temperature. The NP-TiO₂/Sn composite exhibits a 3D nanosponge structure accompanied with nanowires on it. Besides, Sn nanoparticles embed into the ligaments of amorphous TiO₂. Owing to the unique hierarchical structure and the introduction of Sn, the NP-TiO₂/Sn composite exhibits enhanced rate capacities and long cycling life compared with non-added Sn composition. Moreover, it also performs good cycling life and coulombic efficiency at both low and high current densities. When atomic ratio of Ti and Sn is 9:1, the best discharge capacity and cycling performance are exhibited. After circulating 300 cycles at 1 A g⁻¹, the NP-TiO₂/Sn composite shows a high capacity, which doubles pure NP-TiO₂. The good electrochemical performance and facile process favor the practical utilization as the anode material of lithium-ion batteries.

中文翻译：

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一种简单的脱合金法制备锂离子电池用Sn掺杂TiO 2纳米多孔负极材料

通过在室温下在NaOH溶液中蚀刻AlTiSn三元合金带成功地制备了纳米多孔的Sn掺杂TiO ₂（NP-TiO ₂ / Sn）复合材料。NP-TiO ₂ / Sn复合材料具有3D纳米海绵结构，并带有纳米线。另外，Sn纳米颗粒嵌入无定形TiO ₂的韧带中。由于独特的层级结构和Sn的引入，NP-TiO ₂与未添加的Sn成分相比，/ Sn复合物具有更高的倍率容量和更长的循环寿命。此外，它在低电流密度和高电流密度下都具有良好的循环寿命和库伦效率。当Ti和Sn的原子比为9：1时，表现出最佳的放电容量和循环性能。在1 A g ^-1下循环300次循环后，NP-TiO ₂ / Sn复合材料显示出高容量，是纯NP-TiO _2的两倍。良好的电化学性能和简便的工艺有利于实际用作锂离子电池的负极材料。