Heterointerface engineering of hierarchical SnS/ZnS with Rich Phase Boundaries rich phase boundaries for superior sodium storage performance

SnS has been extensively studied as an anode material for sodium storage owing to its high capacity and unique layer spacing. However, the rapid capacity decay and sluggish reaction kinetics result in SnS exhibiting poor electrochemical performance, which prevents its practical application. Herein, the hollow SnS/ZnS nanoboxes ([email protected]) with rich phase boundaries have been constructed and utilized as the anode material of SIBs. The in-situ XRD analysis clearly illustrates the structural transformation of the electrode material during sodium storage and the regeneration of the heterointerface. Furthermore, kinetic analysis combined with ex-situ tests show that the excellent properties of heterostructure composites are inextricably linked to the synergistic effect of heterojunction surfaces. As expected, the [email protected] heterostructure provides a reversible capacity of 553.5 mA h g−1 at 0.2 A g−1 and good rate capability with an average capacity of 62.3% at 5 A g−1 compared to 0.1 A g−1. The elevated Na-storage properties indicate that the heterointerface engineering strategy has a broad promise for improving the application of electrode materials.