1 Introduction MXene, as a recently emerging 2D inorganic material, typically represented by Ti3C2Tx (Tx represents a general surface termination, such as O, F, or OH groups), has attracted great attention because of its metal-like electrical conductivity, tunable hydrophilic surface, and high mechanical properties.[1] These unique merits make MXene show great application potential in the areas of electromagnetic interference (EMI) shielding,[2] flame retardants,[3] electrical sensors,[4] etc.