Flower-like SnS₂/NC@GO composite powders are successfully synthesized by freeze-drying a mixed suspension of graphene oxide (GO) and melamine decorating flower-like SnS₂ powders with following annealing processes, which are confirmed by scanning electron microscope, X-ray diffraction, transmission electron microscope, Raman spectra and thermogravimetric analysis. These results demonstrate that a three dimensional network provided by GO wraps uniformly on the surface of flower-like SnS₂ powders coated with the N-doped carbon (NC) layer derived from melamine, in which the NC layer can effectively relieve the volume expansion and the conductive network can supply plentiful charge transfer channels for electrons and lithium ions. When served as an anode material, the coin cell with the SnS₂/NC@GO composite electrode exhibits an outstanding cyclic property and delivers an average discharge specific capacity of 761.5, 569.7, 502.6, 415.1 and 290.3 mAh g⁻¹ at 100, 200, 300, 500 and 1000 mA g⁻¹, respectively. The cell can deliver a high discharge specific capacity of 621.1 mAh g⁻¹ when the current density recovers suddenly to 100 mA g⁻¹. Moreover, the cell with the SnS₂/NC@GO composite electrode presents an enhanced lithium ions diffusion coefficient of 1.872 × 10⁻¹⁴ cm² s⁻¹ and a low charge transfer resistance of 129.1 Ω. It is no doubt that the as-prepared SnS₂/NC@GO composite with improved electrochemical properties can be used as a promising anode material for lithium-ion batteries.

通过将氧化石墨烯（GO）和三聚氰胺装饰的花状SnS ₂粉末的混合悬浮液冷冻干燥，并通过以下退火工艺，成功地合成了花状SnS ₂ / NC @ GO复合粉末。射线衍射，透射电子显微镜，拉曼光谱和热重分析。这些结果表明GO提供的三维网络均匀地包裹在花状SnS ₂的表面上粉末涂有源自三聚氰胺的N掺杂碳（NC）层，其中NC层可有效缓解体积膨胀，导电网络可为电子和锂离子提供大量电荷转移通道。当服务作为负极材料，与SNS硬币电池₂ / NC @ GO复合电极表现出杰出的循环特性，并提供的平均放电比容量761.5，569.7，502.6，415.1和290.3毫安克^-1，在100，200分别为300、500和1000 mA g ^-1。当电流密度突然恢复到100 mA g ^-1时，该电池可提供621.1 mAh g ^-1的高放电比容量。此外，带有SnS ₂的电池/ NC @ GO复合电极的锂离子扩散系数提高到1.872×10 ^-14  cm ²  s ^-1，电荷转移电阻低至129.1Ω。毫无疑问，所制备的具有改善的电化学性能的SnS ₂ / NC @ GO复合材料可以用作锂离子电池的有希望的负极材料。