A novel two-dimensional rare-earth carbide synthesized by selective etching Al-C slab from nanolaminated YAl3C3

A novel rare-earth-based YCxTδ two-dimensional metal carbide (MXene), with feather-like morphology and hexagonal structure, has been prepared by selective etching of a nanolaminated precursor YAl3C3 non-transition-metal-aluminum-carbides (non-MAX) phase. By analyzing the gas products and first-principle calculation, the chemical reaction is concluded. The YCxTδ MXene shows high reversible gravimetric specific capacity of ~ 84 mAh/g as Li ion...