MXene-based composites for high-performance and fire-safe lithium-ion battery

The safety issues associated with lithium-ion batteries (LIBs), particularly thermal runaway, require attention to facilitate their large-scale applications. The introduction of heat-resistant and flame-retardant materials can effectively inhibit thermal runaway and enhance battery safety. However, these materials often lead to the degradation of energy density, which reduces the battery performance. MXene and MXene-based materials exhibit unique chemical structures and physicochemical properties. In particular, the exceptional thermal conductivity and flame retardancy of MXenes and their composites have been proven to enhance safety when applied in electrodes and separators. However, there is no comprehensive and in-depth overview of MXene-based materials for LIBs. This review systematically and comprehensively discusses design strategies for MXene-based nanocomposites, the electrochemical properties of MXene-based composites for LIBs, and advances in MXenebased material design for improved battery safety. Finally, future prospects of MXene-based composites are presented for the development of high-performance and fire-safe LIBs.