| Abstract Scope |
Two-dimensional (2D) transition metal carbides/nitrides (MXenes), borides (MBenes), and carbo-chalcogenides (TMCCs) are electrically conductive and capable of hosting ions. These properties make them promising electrode materials for electrochemical energy storage, including batteries and supercapacitors. We present the synthesis of novel MXenes, TMCCs, MBenes, and their hybrids, and their application in energy storage systems. These materials exhibit excellent rate capability. For example, 2D molybdenum-MBene delivers a reversible specific capacity exceeding 250 mAh/g at 2 A/g for over 500 cycles when used in lithium-ion batteries. Incorporating 2D materials into hybrids can significantly enhance their specific capacity. We will highlight a few examples of such hybrids and discuss their electrochemical performance in supercapacitors, lithium-ion, and sodium-ion batteries. |