Desired to improve the capacity and cycle stability of lithium sulfur batteries, it is urgent to solve the insulating nature of sulfur cathode, sluggish electrochemical kinetics, and severe shuttle effect associated with polysulfide intermediates. Here single manganese (Mn) atoms implanted in oxygen and nitrogen double-doped hollow carbon sphere frameworks (Mn/C-(N, O)) are prepared as electrocatalyst and anchoring sites for lithium sulfur batteries. O, N-coordinated single Mn atoms can rich in atomic active sites, anchor polysulfides through strong Lewis acid-base interactions. Meanwhile, Mn cofactors show high catalytic activity on the conversion reaction of polysulfides. Moreover, the abundant pores in conductive carbon frameworks can facilitate electrolyte diffusion while simultaneously promote the dynamic protection of the cathode structure during cycling. Consequently, S@Mn/C-(N, O) exhibits an excellent cycling stability with an initial capacity of ~900 mAh g⁻¹ at 1 C with only 0.05% capacity decay per cycle after 1000 cycles. The theoretical simulation results and the enhanced electrochemical performance show the important role of single atom in accelerating polysulfides transformation and suppressing the "shuttle effect".

为了提高锂硫电池的容量和循环稳定性，迫切需要解决硫阴极的绝缘性，缓慢的电化学动力学以及与多硫化物中间体相关的严重的穿梭效应。在这里，将单锰（Mn）原子植入氧和氮双掺杂空心碳球骨架（Mn / C-（N，O））中，作为锂硫电池的电催化剂和锚固位。O，N配位的单个Mn原子可富含原子活性位点，可通过强路易斯酸碱相互作用固定多硫化物。同时，Mn辅助因子对多硫化物的转化反应具有较高的催化活性。此外，导电碳骨架中的大量孔可促进电解质扩散，同时在循环过程中同时促进阴极结构的动态保护。因此，S @ Mn / C-（N，O）表现出出色的循环稳定性，初始容量约为900 mAh g在1 C时为^-1，在1000次循环后每个循环的容量衰减仅为0.05％。理论仿真结果和增强的电化学性能表明，单原子在加速多硫化物转化和抑制“穿梭效应”方面具有重要作用。