Synergistic Engineering of Architecture and Composition in Bimetallic Selenide@Carbon Hybrid Nanotubes for Enhanced Lithium‐ and Sodium‐Ion Batteries

Abstract Developing sustainable and affordable anode materials that are capable of delivering high performance in both lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs) remains a significant challenge. Bimetallic selenide@carbon hybrids are considered as one of the most promising anode materials in LIBs and SIBs due to their high electronic conductivity, high specific capacity, and fast reaction kinetics. Herein, a series of bimetallic selenide@carbon hybrid nanotubes are successfully prepared as anodes of LIBs or SIBs based on the dual regulation of component and micro‐nanostructure. The selenization strategy plays a key important role in determining the composition, microstructure, and electrochemical energy storage properties of anode materials. As a consequence, the ZnSe/CoSe 2 @NPC NTs(I)‐600 exhibit a reversible capacity of 1328.3 mAh g −1 at 0.1 A g −1 and superior rate capability (269.1 mAh g −1 at 10 A g −1 ) towards Li + storage. Meanwhile, ZnSe/CoSe 2 @NPC NTs(II)‐700 achieve 354.1 mAh g −1 at 0.1 A g −1 and ultralong cycling stability (97.6% of capacity retention after 40 000 cycles at 10 A g −1 ) used as anode materials in SIBs. This study provides a feasible strategy to fabricate selenide‐based composites as anode materials for high‐performance LIBs and SIBs via architecture engineering and composition tailoring.