Covalent Assembly of MoS₂ Nanosheets with SnS Nanodots as Linkages for Lithium/Sodium‐Ion Batteries

Abstract

Abstract Weak van der Waals interactions between interlayers of two‐dimensional layered materials result in disabled across‐interlayer electron transfer and poor layered structural stability, seriously deteriorating their performance in energy applications. Herein, we propose a novel covalent assembly strategy for MoS 2 nanosheets to realize unique MoS 2 /SnS hollow superassemblies (HSs) by using SnS nanodots as covalent linkages. The covalent assembly based on all‐inorganic and carbon‐free concept enables effective across‐interlayer electron transfer, facilitated ion diffusion kinetics, and outstanding mechanical stability, which are evidenced by experimental characterization, DFT calculations, and mechanical simulations. Consequently, the MoS 2 /SnS HSs exhibit superb rate performance and long cycling stability in lithium‐ion batteries, representing the best comprehensive performance in carbon‐free MoS 2 ‐based anodes to date. Moreover, the MoS 2 /SnS HSs also show excellent sodium storage performance in sodium‐ion batteries.