Construction of a novel heterostructure of Bi2S3/Sb2S3 nanorod with improved sodium storage performances

In this study, a rod-like heterogeneous Bi 2 S 3 /Sb 2 S 3 was systematically engineered through a simple one-step hydrothermal method and subsequently used as an anode active material for sodium-ion batteries (SIBs). The Bi 2 S 3 /Sb 2 S 3 heterostructure electrode exhibits a high initial discharge capacity of 972.2 mAh g −1 and maintains a reversible capacity of 369.4 mAh g −1 after 500 cycles at a current density of 1 A g −1 . The outstanding electrochemical performance of the Bi 2 S 3 /Sb 2 S 3 electrode can be attributed to the synergistic contributions of the high capacity of Sb 2 S 3 and the excellent stability of Bi 2 S 3 . Simultaneously, the abundant heterogeneous phase boundaries formed by Bi 2 S 3 and Sb 2 S 3 provide stable reaction interfaces, better structural integrity, and enhanced Na + reaction kinetics. This work presents an opportunity to develop heterogeneous Bi 2 S 3 /Sb 2 S 3 anode materials with excellent properties, holding promise for potential applications in SIBs.