Novel Sb₂Se₃/reduced graphene oxide (rGO) composite, 1D Sb₂Se₃ nanorods wrapped with rGO, has been successfully synthesized by a facile spray drying method. Compared to as-prepared Sb₂Se₃ nanorods, the obtained Sb₂Se₃/rGO composite, as anode for lithium-ion batteries (LIBs), exhibited super electrochemical performances. The results suggest that Sb₂Se₃/rGO composite can retain a reversible capacity of 394 mAh g⁻¹ over 200 cycles at 100 mA g⁻¹ between 0.01 and 3 V (vs Li/Li⁺). Even at a high rate current density of 1000 mA g⁻¹, a discharge capacity of 247 mAh g⁻¹ was computed, indicating that this LIB possesses good rate capability. This improved electrochemical performance can be attributed to the 1D nanostructure, and also to the introduction of rGO, which provided more electron transport pathways and shortened the Li-ion diffusion through the electrolyte. Consequently, the cluster of 1D Sb₂Se₃ nanorods that are wrapped in the rGO nanostructure can efficiently buffer large volume changes and retain the structural stability during lithiation and delithiation process, resulting in an excellent electrochemical performance.

Schematic illustration of the Sb₂Se₃/RGO composite synthesis process

新型的Sb ₂ Se ₃ /还原氧化石墨烯（rGO）复合材料，包裹有rGO的一维Sb ₂ Se ₃纳米棒，已经通过一种简便的喷雾干燥方法成功合成。与制备的Sb ₂ Se ₃纳米棒相比，所得的Sb ₂ Se ₃ / rGO复合材料作为锂离子电池（LIBs）的负极，表现出超强的电化学性能。结果表明，Sb ₂ Se ₃ / rGO复合材料在200循环中在100 mA g ^-1和0.01 V至3 V之间可保持394 mAh g ^-1的可逆容量（相对于Li / Li ⁺）。即使在1000mA g ^-1的高倍率电流密度下，也计算出247 mAh g ^-1的放电容量，表明该LIB具有良好的倍率能力。这种改善的电化学性能可以归因于一维纳米结构，也归因于rGO的引入，rGO提供了更多的电子传输途径，并缩短了锂离子通过电解质的扩散。因此，包裹在rGO纳米结构中的一维Sb ₂ Se ₃纳米棒簇可以有效地缓冲大体积变化，并在锂化和脱锂过程中保持结构稳定性，从而获得出色的电化学性能。

Sb ₂ Se ₃ / RGO复合合成过程的示意图