As a new type of two-dimensional (2D) transition metal carbide/nitride, MXene shows great potential in the field of electrochemical energy storage due to its high conductivity, adjustable interlayer spacing, rich surface functional groups and excellent mechanical properties. As a multifunctional electrode carrier, MXene can effectively help alleviate the volume expansion of high-capacity materials and help overcome the problems of poor conductivity, easy dissolution and structural collapse. The MXene protective layer can be used as a physical barrier to reduce the side reactions at the electrode interface and redistribute the electric field and ion flux at the interface, thereby guiding the uniform nucleation and deposition of cations. In lithium-sulfur batteries, MXene can be used as an adsorbent and catalytic conversion center for polysulfides, which significantly inhibits the side reactions caused by polysulfides. Studies have shown that the structural stability and electrochemical state of MXene can be significantly optimized through strategies such as interface engineering, interlayer regulation, and structural design. Nevertheless, MXene still faces challenges such as insufficient stability, high cost, and unclear energy storage mechanism. This paper systematically reviews the latest research progress of MXene in the field of batteries, aiming to provide useful guidance for the design of next-generation high-performance batteries.



