Metallic phase (1T) MoS₂ has attracted enormous attention as an appealing energy storage material for batteries, supercapacitors, and catalysts. However, a facile fabrication method is lacking and the intensive understanding of its sodium storage mechanism is absent. Herein, ultrathin 1T MoS₂ nanosheets (1–2 layers) are directly fabricated via and are investigated as an anode material for sodium-ion batteries. Interestingly, the as-prepared 1T MoS₂ nanosheets demonstrate a high reversible capacity of 450 mAh g⁻¹ at 50 mA g⁻¹ and outstanding cycling stability with a high capacity retention ratio of 94% after 200 cycles at 1 A g⁻¹, which is far superior to that of the 2H phase counterpart. Density function theory (DFT) calculations show that, in addition to significantly enhanced electronic conductivity, 1T MoS₂ also possesses much more sodium philicity and faster Na atom mobility in comparison with the 2H phase. More importantly, as revealed by ex-situ Raman, in-situ X-ray diffraction, and DFT calculations, the 1T MoS₂ is more capable of suppressing the dissolution of S species from the material structure compared with the 2H phase, leading to excellent cycling stability. The facile and easily scalable method as well as the deep mechanism analysis will provide a very important reference for the development of high-performance MoS₂ anodes and other SIB electrode materials.

金属相（1T）MoS ₂作为一种有吸引力的电池，超级电容器和催化剂的储能材料受到了广泛的关注。然而，缺少一种简便的制造方法，并且缺乏对其钠储存机理的深入了解。在此，可直接通过制造超薄1T MoS ₂纳米片（1-2层），并将其作为钠离子电池的负极材料进行研究。有趣的是，如此制备的1T MoS ₂纳米片在50 mA g ^-1时显示出450 mAh g ^-1的高可逆容量，在1 A g ^-1下200次循环后具有出色的循环稳定性和94％的高容量保持率，远远优于2H相。密度泛函理论（DFT）计算表明，与2H相相比，除了显着提高电子电导率外，1T MoS ₂还具有更多的钠亲和力和更快的Na原子迁移率。更重要的是，如异位拉曼光谱，原位X射线衍射和DFT计算所揭示的，与2H相相比，1T MoS ₂能够更有效地抑制S物质从材料结构中溶解，循环稳定性。便捷，易于扩展的方法以及深入的机制分析将为高性能MoS ₂的开发提供非常重要的参考。 阳极和其他SIB电极材料。