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

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/CoSe2@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/CoSe2@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.

Automated summary

Developing sustainable and affordable anode materials with high performance in both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) is a significant challenge. Bimetallic selenide@carbon hybrids are considered promising due to their high electronic conductivity, specific capacity, and reaction kinetics.