Phase Stabilization and Interlayer Engineering in MoS ₂ Superlattice via van der Waals Wrapping for High‐Performance Water Desalination

Abstract Electrochemical deionization (EDI) is a promising technology for mitigating global water scarcity. Metallic 1T‐MoS 2 represents an ideal electrode candidate owing to its exceptional electrical conductivity and weakened interlayer van der Waals (vdW) forces. However, the thermodynamic instability of 1T‐MoS 2 poses a significant challenge to its synthesis, hindering practical implementation. Herein, a vdW wrapping strategy is proposed to construct a 1T‐MoS 2 /C superlattice with alternating layers of 1T‐MoS 2 and carbon. This vdW‐confined carbon wrapping concurrently stabilizes the metastable 1T phase to enhance conductivity and engineers the interlayer spacing to facilitate accessible ion transport pathways, thereby boosting ion diffusion kinetics and cycling durability. The resulting architecture delivers outstanding desalination performance (51.14 mg g −1 desalination capacity, 9.36 mg g −1 min −1 desalination rate), rivaling the top‐tier reported EDI electrode materials. Furthermore, the 1T‐MoS 2 /C superlattice exhibits superior cycling stability, retaining over 90% of desalination capacity over cycling tests. This work establishes a novel design principle for stabilizing metastable materials and engineering high‐performance electrodes.