Atomic surface modification strategy of MXene materials for high-performance metal sulfur batteries

Improved MXenes based on heteroatom doping endow them with various new or optimized physicochemical, optical and structural properties. This greatly expands the library of MXenes materials and their potential for a range of applications. In this article, we comprehensively and critically discuss the synthesis and performance of the growing heteroatom doping and its family of composite MXenes materials in metal-sulfur batteries. We first summarize the heteroatom doping and its composite strategy of high-performance MXenes and analyze and summarize the mechanism of atomic element doping from three aspects: structure optimization, functional substitution and interface modification, aiming to provide clues for the development of new controllable synthetic routes. Emerging synthesis and optimization mechanisms related to metal-sulfur batteries are highlighted. Finally, we propose future opportunities and challenges for multifunctional high-performance MXenes research and metal-sulfur batteries. This work could open up new prospects for the development of high-performance MXenes in metal-sulfur batteries.