Molybdenum disulfide (MoS₂) has been considered a promising anode material for sodium ion batteries (SIBs) because of its relatively high theoretical capacity and 2D-layered structure. However, the intrinsically low electronic conductivity of MoS₂ and its severe volume change during battery operation lead to poor rate capability and cyclability. In this study, nitrogen self-doped MoS₂/carbon spheres (denoted as N-MoS₂/C) were easily synthesized through a facile naturally occurring acid-catalyzed method, which takes advantage of the self-doping effect of thioacetamide as a sulfur as well as nitrogen co-source and the self-polymerization property of furfural as a carbon source. The enlarged interlayer and defect-containing N-MoS₂/C provides not only sufficient active sites to diffuse electrons and sodium ions but also a buffer structure, which can accommodate volume change during sodiation/desodiation. The unique structure of N-MoS₂/C demonstrates remarkable electrochemical performances, such as high rate capability (charge capacity of 387.9 mAh g^-1 at 10 C-rate), superior cyclability (capacity retention of 78 % over 200 cycles at 0.2 C-rate), and high-rate cycling (capacity retention of over 96 % even after 100 cycles at 1, 2, and 5 C-rate).

由于其较高的理论容量和2D层结构，二硫化钼（MoS ₂）被认为是钠离子电池（SIB）的有希望的阳极材料。然而，MoS ₂本质上较低的电子电导率及其在电池运行期间的剧烈体积变化导致差的速率能力和循环性。在这项研究中，氮的自掺杂MoS ₂ /碳球（表示为N-MoS ₂ / C）可以通过一种简便的天然酸催化方法轻松合成，该方法利用了硫代乙酰胺作为硫的自掺杂作用。以及氮共源和糠醛作为碳源的自聚合性能。扩大的中间层和含缺陷的N-MoS₂ / C不仅提供了足够的活性位点来扩散电子和钠离子，而且还提供了缓冲结构，可以适应在增盐/脱盐过程中的体积变化。N-MoS ₂ / C的独特结构显示出卓越的电化学性能，例如高倍率容量（在10 C速率下的充电容量为387.9 mAh g ^-1），出色的循环性（0.2 C下200个循环的容量保持率为78％）速率）和高速率循环（即使在1、2和5 C速率下进行100次循环后，容量保持率仍超过96％）。