Transition Metal Carbo‐Chalcogenide “TMCC:” A New Family of 2D Materials
Ahmad Majed, Manish Kothakonda, Fei Wang, Eric Néstor Tseng, Kaitlyn Prenger, Xiaodong Zhang, Per O. Å. Persson, Wei Jiang, Jianwei Sun, Michael Naguib
Abstract
Abstract Here, a new family of 2D transition metal carbo‐chalcogenides (TMCCs) is reported, which can be considered a combination of two well‐known families, TM carbides (MXenes) and TM dichalcogenides (TMDCs), at the atomic level. Single sheets are successfully obtained from multilayered Nb 2 S 2 C and Ta 2 S 2 C using electrochemical lithiation followed by sonication in water. The parent multilayered TMCCs are synthesized using a simple, scalable solid‐state synthesis followed by a topochemical reaction. Superconductivity transition is observed at 7.55 K for Nb 2 S 2 C. The delaminated Nb 2 S 2 C outperforms both multilayered Nb 2 S 2 C and delaminated NbS 2 as an electrode material for Li‐ion batteries. Ab initio calculations predict the elastic constant of TMCC to be over 50% higher than that of TMDC.