Both SnW₃O₉ and SnW₃O₉/C microspheres were successfully synthesized by a simple solvothermal method combined with low-temperature heat treatment. The structures and morphologies of the desired samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy techniques. Meanwhile, the electrochemical performances for both SnW₃O₉ and SnW₃O₉/C were tested as anode materials. Compared with the SnW₃O₉ electrode, the SnW₃O₉/C electrode has higher reversible capacity and better cycle performance. At the current density of 1000 mA g⁻¹, it achieved an initial discharge capacity of 1327 mAh g⁻¹ and retained at 873 mAh g⁻¹ after 175 cycles. Electrochemical impedance spectroscopy (EIS) measurements showed that SnW₃O₉/C electrode owned lower charge transfer resistance and larger Li⁺ diffusion coefficient than those of pure SnW₃O_9, which explained why SnW₃O₉/C behaved outstanding electrochemical performance during discharge/charge process. So, the SnW₃O₉/C composite is a potential anode material for the lithium-ion battery application.

通过简单的溶剂热法结合低温热处理成功合成了SnW ₃ O ₉和SnW ₃ O ₉ /C微球。所需样品的结构和形态通过 X 射线衍射、X 射线光电子能谱、扫描电子显微镜和透射电子显微镜技术进行表征。同时，测试了作为负极材料的SnW ₃ O ₉和 SnW ₃ O ₉ /C的电化学性能。与 SnW ₃ O ₉电极相比，SnW ₃ O ₉/C电极具有更高的可逆容量和更好的循环性能。在1000 mA g ^-1的电流密度下，它实现了1327 mAh g ^-1的初始放电容量，并在175次循环后保持在873 mAh g ^-1。电化学阻抗谱（EIS）测量结果表明，SNW ₃ ö ₉ / C电极拥有较低的电荷转移电阻和更大的锂⁺扩散系数比纯SNW的₃ ö _9，这解释了为什么SNW ₃ ö ₉ / C期间表现出色的电化学性能放电/充电过程。因此，SnW ₃ O ₉/C复合材料是锂离子电池应用的潜在负极材料。