Abstract:
Ti
2CT
x was prepared through etching Ti
2AlC by molten salt method (NaF+KF) and liquid phase method (HCl+NaF). The phase composition, microscopic morphology, surface functional groups and electrochemical properties of etched products by the two methods were compared and studied. The results show that the Ti
2CT
x obtained by liquid phase method had higher purity with four functional groups (C-O, C=O, C-F and O-H) on the surface, and the main impurity was TiC. The Ti
2CT
x obtained by molten salt method had small interlayer spacing with two functional groups (C=O and O-H) on the surface, and the main impurity was K
2NaAlF
6. Ti
2CT
x prepared by molten salt method and liquid phase method both showed good rate performance and electrochemical reversibility, and the latter had better capacitance performance.