Facile synthesis of rationally designed structures is critical to realize a high performance electrode for lithium-ion batteries (LIBs). Among different candidates, tin(IV) oxide (SnO₂) is one of the most actively researched electrode materials due to its high theoretical capacity (1493 mAh g⁻¹), abundance, inexpensive costs, and environmental friendliness. However, severe capacity decay from the volume expansion and low conductivity of SnO₂ have hampered its use as a feasible electrode for LIBs. Rationally designed SnO₂-based nanostructures with conductive materials can be an ideal solution to resolve such limitations. In this work, we have successfully fabricated porous SnO₂-CuO composite nanotubes (SnO₂-CuO p-NTs) by electrospinning and subsequent calcination step. The porous nanotubular structure is expected to mitigate the volume expansion of SnO₂, while the as-formed Cu from CuO upon lithiation allows faster electron transport by improving the low conductivity of SnO₂. With a synergistic effect of both Sn and Cu-based oxides, SnO₂-CuO p-NTs deliver stable cycling performance (91.3% of capacity retention, ∼538 mAh g⁻¹) even after 350 cycles at a current density of 500 mA g⁻¹, along with enhanced rate capabilities compared with SnO₂.

合理设计结构的简便合成对于实现锂离子电池（LIB）的高性能电极至关重要。在不同的候选材料中，氧化锡（IV）（SnO ₂）由于其高的理论容量（1493 mAh g ^-1），丰富，廉价的成本和环境友好性而成为研究最活跃的电极材料之一。然而，由于SnO ₂的体积膨胀和低电导率导致的严重容量衰减已经阻碍了其用作LIB的可行电极。合理设计的具有导电材料的基于SnO ₂的纳米结构可能是解决此类局限性的理想解决方案。在这项工作中，我们成功地制造了多孔SnO ₂ -CuO复合纳米管（SnO通过静电纺丝和随后的煅烧步骤制得₂ -CuO p-NTs。多孔纳米管结构有望减轻SnO ₂的体积膨胀，而锂化后从CuO形成的Cu则可以通过改善SnO ₂的低电导率来实现更快的电子传输。利用Sn和Cu基氧化物的协同作用，即使在电流密度为500 mA g的情况下经过350次循环后，SnO ₂ -CuO p-NTs仍可提供稳定的循环性能（容量保持率的91.3％，约538 mAh g ^-1）。^-1，以及与SnO ₂相比增强的速率功能。