SnS, is a promising anode material for lithium ion batteries (LIBs) and sodium ion batteries (SIBs), however, undergoes poor cyclic lifespan due to its huge volume changes and bad electroconductivity. Here, a modified CVD method is used to directly grow graphene‐like carbon film on the surface of SnS nanosheet arrays which are supported by Co‐, N‐modified porous carbon fibers (CCF@SnS@G). In the strategy, the SnS nanosheet arrays confined into the integrated carbon matrix containing porous carbon fibers and graphene‐like carbon film, perform a greatly improved electrochemical performance. In situ TEM experiments reveal that the vertical graphene‐like carbon film can not only protect the SnS nanosheet from destruction well and enhance the conductivity, but also transforms SnS nanosheet into ultrafine nanoparticles to promote the electrochemical kinetics. Systematic electrochemical investigations exhibit that the CCF@SnS@G electrode delivers a stable reversible capacity of 529 mAh g⁻¹ at a high current density of 5 A g⁻¹ for LIBs and 541.4 mAh g⁻¹ at 2 A g⁻¹ for SIBs, suggesting its good potential for anode electrodes.

中文翻译：

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多孔碳纤维上的类石墨烯碳膜包裹硫化锡纳米片阵列，具有增强的电化学动力学作为高性能锂和钠离子电池阳极

SnS是一种很有前景的锂离子电池（LIB）和钠离子电池（SIB）负极材料，但由于其巨大的体积变化和较差的导电性，其循环寿命较差。这里，采用改进的CVD方法直接在SnS纳米片阵列的表面生长类石墨烯碳膜，该阵列由Co、N改性多孔碳纤维（CCF@SnS@G）支撑。在该策略中，SnS纳米片阵列被限制在包含多孔碳纤维和类石墨烯碳膜的集成碳基体中，大大提高了电化学性能。原位TEM实验表明，垂直类石墨烯碳膜不仅可以很好地保护SnS纳米片免受破坏并增强导电性，而且还可以将SnS纳米片转化为超细纳米颗粒以促进电化学动力学。系统电化学研究表明，CCF@SnS@G电极在5 A g ^-1的高电流密度下（对于LIB）可提供529 mAh g ^-1的稳定可逆容量，对于SIB （在2 A g ^-1的电流密度下）可提供541.4 mAh g ^{-1 的}稳定可逆容量，表明其作为阳极电极的良好潜力。