In situ fabrication of MXene/CuS hybrids with interfacial covalent bonding via Lewis acidic etching route for efficient sodium storage

A simple strategy is proposed for the fabrication of Ti 3 C 2 T x /CuS hybrids via Lewis acidic etching route. The Ti 3 C 2 T x /CuS shows boosted charge/mass transfer kinetics and structural integrity, leading to superior sodium storage performance.