Molybdenum disulfide (MoS₂) is a promising anode material for sodium ion battery. Nevertheless, the semi-conductive feature and closely stacked nanostructure hinder its application. Moreover, the uncontrolled geometric structure and loose combination with high-conductive matrix lead to a limited Na⁺ diffusion path and easy-destroyed structure. Here, a strongly-combined MoS₂/rGO nanosheet structure is realized by ionic liquid induced layer-by-layer self-assembly approach. The ionic liquid works well as bi-functional assisted solvent to induce the uniform growth of MoS₂ on rGO layers and to maintain the large-scale morphology of rGO nanosheet. The enlarged interlayer distance between S–Mo–S adjacent planes facilitates the fast Na⁺ transport. The well-maintained rGO layer affords favorable tolerance to the volume change of MoS₂ and increases the conductivity as well. Density function theory calculations demonstrate that the enlarged interlayer reduces the diffusion energy barriers of Na⁺ and accelerates the reaction kinetics. Benefitting from the strong bonding between few-layered MoS₂ nanoflake and well-maintained 2D rGO nanosheet, the MoS₂/rGO composite exhibits a high specific capacity (581.7 mA h g⁻¹ after 100 cycles at 100 mA g⁻¹), remarkable rate capability (309.2 mA h g⁻¹ at 12.8 A g⁻¹) and excellent cycling stability (263.2 mA h g⁻¹ after 300 cycles at 3 A g⁻¹).

二硫化钼（MoS ₂）是一种有前景的钠离子电池负极材料。然而，半导体特征和紧密堆叠的纳米结构阻碍了其应用。此外，不受控制的几何结构以及与高导电基体的松散结合导致有限的Na ⁺扩散路径和易破坏的结构。在这里，通过离子液体诱导的逐层自组装方法实现了强结合的MoS ₂ / rGO纳米片结构。离子液体可以很好地用作双功能辅助溶剂，以诱导MoS ₂在rGO层上的均匀生长，并保持rGO纳米片的大规模形态。S–Mo–S相邻平面之间的增大的层间距离有利于快速Na⁺运输。维护良好的rGO层可为MoS ₂的体积变化提供良好的容忍度，并同时提高电导率。密度泛函理论计算表明，增大的中间层降低了Na ⁺的扩散能垒，并加快了反应动力学。从几个层次的MoS之间的强接合受益₂纳米片和维护良好的2D RGO纳米片，所述MOS ₂ / RGO复合物表现出高的比容量（581.7毫安ħ克^-1在100mA克100次循环后^-1，显着的速率）能力（309.2毫安汞柱^-1  12.8 A G ^-1）和优异的循环稳定性（263.2毫安ħ克在3 A g ^{-1的条件下}经过300次循环后为^-1。