Layer-structured transition-metal disulfides are considered as promising anode materials for sodium ion batteries (SIBs). However, large volume change over charge-discharge cycles is behind a major problem for mechanical failure, leading to low capacity, poor rate and cycling performance. In this work, we devise a one-step solvothermal method to construct reduced graphene oxide (RGO) aerogel containing nano-roses made of few-layer MoS₂ petals, which exhibit significant enlargement in inter-layer spacing. Such MoS₂@RGO composites are applied as SIBs anode to facilitate remarkable improvement of rate capacity (513.8 mAh g⁻¹ at 0.1 A g⁻¹ and 171.5 mAh g⁻¹ at high current density 20 A g⁻¹) and cycling stability (>80% capacity retention, 223.2 mAh g⁻¹, after 500 cycles at 0.5 A g⁻¹). Furthermore, theoretical calculations are employed to study the sodiation/de-sodiation mechanisms, which guide realization of high cycling stability beyond 1000 cycles, through applying a positive discharge cut-off voltage above 0.4 V to keep the layered structures from decomposition.

层状过渡金属二硫化物被认为是钠离子电池（SIB）的有希望的阳极材料。然而，在充放电循环中较大的体积变化是机械故障的主要问题，导致容量低，速率差和循环性能下降。在这项工作中，我们设计了一种单步溶剂热方法，以构建还原的氧化石墨烯（RGO）气凝胶，该气凝胶包含由几层MoS ₂花瓣制成的纳米玫瑰，其在层间间距上表现出显着的增大。这样的MoS _2级@RGO复合材料被应用作为SIB的阳极，以方便的速率容量（513.8毫安克显着的改善^-1在0.1 A克^-1和171.5毫安克^-1在高电流密度20 A G ^-1）和循环稳定性（> 80％的容量保持率，223.2毫安克^-1，在0.5 A克500次循环后^-1）。此外，通过理论计算来研究沉积/脱盐机理，通过施加高于0.4 V的正放电截止电压来防止分层结构分解，从而指导实现超过1000次循环的高循环稳定性。