Heterogeneous engineering of MnSe@NC@ReS 2 core–shell nanowires for advanced sodium‐/potassium‐ion batteries

Abstract Sodium‐ion batteries (SIBs) and potassium‐ion batteries (PIBs) have been attracting great attentions and widely been exploited due to the abundant sodium/potassium resources. Hence, the preparation of high‐powered anode materials for SIBs/PIBs plays a decisive role for the commercial applications of SIBs/PIBs in the future. Manganese selenides are a class of potential anode materials for SIBs/PIBs because of their small band gap and high electrical conductivity. In this work, MnSe and ReS 2 core–shell nanowires connecting by polydopamine derived carbon nanotube (MnSe@NC@ReS 2 ) have been successfully synthesized from growing ReS 2 nanosheets array on the surface of MnSe@NC nanowires, which present excellent Na + /K + storage performance. While applied as SIBs anode, the specific capacity of 300 mAh·g −1 was maintained after 400 cycles at the current density of 1.0 A·g −1 . Besides, it could also keep 120 mAh·g −1 specific capacity after 900 cycles at 1.0 A·g −1 for the anode of PIBs. These heterogeneous engineering and one‐dimensional–two‐dimensional (1D‐2D) hybrid strategies could provide an ideal strategy for the synthesis of new hetero‐structured anode materials with outstanding battery performance for SIBs and PIBs.