Tin sulfide (SnS) is an attractive anode material for energy storage, but suffers from poor reversibility and serious polarization. In this work, to increase electron and ion transportation and the structural stability of SnS, polypyrrole–phosphomolybdic acid-coated SnO₂@C spheres were used as self-templates to construct SnS@C nanospheres coated with MoS₂ nanosheets and a nitrogen, phosphorus-codoped carbon layer (SnS@C/MoS₂@N,P-C). Endowed with a synergetic effect from SnS, MoS₂, and the carbon network, SnS@C/MoS₂@N,P-C delivered a first reversible capacity of 628 mA h g⁻¹ with a high initial coulombic efficiency of 74.9%, capacity retention of 59.8% over 2000 cycles at 5.0 A g⁻¹ and an exceptional rate capability of 250 mA h g⁻¹ at 10.0 A g⁻¹ when used as an anode material for sodium-ion batteries (SIBs). This high rate capability is possibly promoted by pseudocapacitive behavior attributed to the rich interfaces between the different components. Moreover, an assembled full cell with Na₃V₂(PO₄)₃@C as the cathode exhibits a capacity of 455 mA h g⁻¹ at 0.5 A g⁻¹ after 50 cycles, showing good potential for practical applications in the future.

中文翻译：

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SnS @ C纳米球涂有几层MoS2纳米片和氮，磷掺杂的碳作为坚固的钠离子电池阳极

硫化锡（SnS）是一种有吸引力的用于储能的阳极材料，但可逆性差且极化严重。在这项工作中，为了增加电子和离子的传输以及SnS的结构稳定性，以聚吡咯-磷钼酸涂层的SnO ₂ @C球为自模板，构建了涂有MoS ₂纳米片和氮，磷的SnS @ C纳米球。-共掺杂碳层（SnS @ C / MoS ₂ @ N，PC）。得益于SnS，MoS ₂和碳网络SnS @ C / MoS ₂ @N的协同作用，PC的初始可逆容量为628 mA hg ^-1，初始库仑效率高达74.9％，容量保持率为在5.0 A g下2000次循环中有59.8％^-1和用作钠离子电池（SIB）的负极材料时，在10.0 A g ^-1时具有250 mA hg ^-1的出色倍率能力。归因于不同组件之间的丰富接口的伪电容行为可能会提高这种高速率能力。此外，以Na ₃ V ₂（PO ₄） ₃ @C为阴极的组装式全电池在50个循环后，在0.5 A g ^-1下显示455 mA hg ^-1的容量，显示出在未来实际应用中的良好潜力。