Interlayer Structural Engineering of 2D MXene for Electrochemical Energy Storage

2D MXenes have been widely applied in the field of electrochemical energy storage owing to their high electrical conductivity, large redox-active surface area, rich surface chemistry, and tunable structures. However, electrodes made from pristine MXene with small interlayer spacing exhibit unsatisfied electrochemical performance. Significantly, MXene with expanded and engineered interlayer structures for excellent storage capability is confirmed. In this chapter, we summarize the recent advances in the interlayer structural engineering of MXene-based nanomaterials for electrochemical energy storage applications. Moreover, we provide a deep discussion on the relationship between interlayer structure and electrochemical performance from the view of energy storage mechanisms. Finally, the challenges and prospects for the future research of interlayer structural engineering of MXenes are outlined.