Abstract As a new type of composite two-dimensional material formed by the combination of Covalent Organic Frameworks (COFs) and two- dimensional (2D) MXenes, COF/MXene heterostructures (COF@MXene) inherit the stable porous two-dimensional structure of COFs and the excellent electrochemical performance and catalytic activity of MXenes, thus attracting widespread attention. Additionally, COF@MXene possesses various elemental affinity sites, efficient ion channels, and the ability to append various functional groups, which endow them with tremendous potential in electrochemical energy storage, energy conversion, and catalysis. Currently, there is a lack of extensive literature discussing the utilization of COF@MXene. The quest for enhanced physicochemical attributes through tailored modifications and composite strategies for COF@MXene is still a noteworthy hurdle. Furthermore, discovering novel application contexts that can harness the exceptional capabilities of these materials presents a formidable task. This review initiates with an exploration of the primary methodologies for synthesizing COF and MXene composites. Subsequently, it outlines the diverse applications of COF and MXene in energy storage, energy conversion, and environmental conservation. Lastly, it discusses the primary obstacles and future trajectories within these domains.

Innovative COF@MXene composites for high performance energy applications

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