Interfacial structure design of MXene-based nanomaterials for supercapacitors and batteries

2D transition metal carbides and nitrides (MXene) have attracted huge attention in the field of electrochemical energy storage owing to their high electrical conductivity, and large redox active surface area. Notably, the electrochemical performances of MXenes are directly dependent on their synthesis conditions, interfacial chemistries and structural configurations. Herein, we summarize the synthesis approaches of MXenes, and the recent advances in the interfacial structure design of MXene-based nanomaterials for supercapacitors and batteries. Additionally, we provide an in-depth discussion on the relationship between interfacial structure and electrochemical performance from the perspectives of energy storage mechanisms. Finally, the challenges and future research directions of interfacial structure design of MXenes are outlined.