Transition metal carbides, carbonitrides, and nitrides or MXenes represent a large family of 2D materials derived from a class of ternary ceramic materials. It has a formula of Mn+1XnTx, where M is an early transition metal, X is carbon and/or nitrogen, and n ranges from 1 to 3 and T can be any functional moieties, usually -OH, -O or –F. The term...