Electrochemical performance of MXenes as K-ion battery anodesElectronic supplementary information (ESI) available: Experimental details about the characterization techniques used in this study, EIS and the electrochemical performance of Ti3C2Tz and Nb2CTz. See DOI: 10.1039/c7cc02026k

Herein, we report on the electrochemical performance of two-dimensional transition metal carbonitrides as novel promising electrode materials in K-ion batteries. Titanium carbonitride, Ti 3 CNT z , was investigated in detail using electrochemical galvanostatic cycling at various current densities. X-ray diffraction and X-ray photoelectron spectroscopy were used to study the potassiation mechanism and its structural changes. Herein, we report on the electrochemical performance of two-dimensional transition metal carbonitrides as novel promising electrode materials in K-ion batteries.