MXenes ae newely emerging two-dimensional (2D) nanomaterials. MXenes are transition metal carbides, nitrides, and/or carbonitrides with the general formula Mn+1XnTx, where M is an early transition metal (e.g., Ti, Zr, V, Nb, Ta, or Mo), X is carbon and/or nitrogen, and Tx represents the functional groups on the surface. Since the discovery at Drexel University in 2011, MXenes have received immense attention in the areas of energy storage, electromagnetic interference shielding, antennas, transparent conductors, sensors, membranes, catalysis and medicine, due to their many advantages including the outstanding metallic conductivity, low density, large specific surface area, tunable surface chemistry, and solution processability. This thematic series aim to introduce the latest research trend of the synthesis of MXenes and their representative applications including electrochemical energy storage and EMI shielding.