%O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %D 2013 %V 4 %J Nature Communications %A O Mashtalir %A M Naguib %A VN Mochalin %A Y Dall'Agnese %A M Heon %A MW Barsoum %A Y Gogotsi %L discovery10076108 %T Intercalation and delamination of layered carbides and carbonitrides %K Molecular dynamics, Two-dimensional materials %X Intercalation and delamination of two-dimensional solids in many cases is a requisite step for exploiting their unique properties. Herein we report on the intercalation of two-dimensional Ti3C2, Ti3CN and TiNbC—so called MXenes. Intercalation of hydrazine, and its co-intercalation with N,N-dimethylformamide, resulted in increases of the c-lattice parameters of surface functionalized f-Ti3C2, from 19.5 to 25.48 and 26.8 Å, respectively. Urea is also intercalated into f-Ti3C2. Molecular dynamics simulations suggest that a hydrazine monolayer intercalates between f-Ti3C2 layers. Hydrazine is also intercalated into f-Ti3CN and f-TiNbC. When dimethyl sulphoxide is intercalated into f-Ti3C2, followed by sonication in water, the f-Ti3C2 is delaminated forming a stable colloidal solution that is in turn filtered to produce MXene ‘paper’. The latter shows excellent Li-ion capacity at extremely high charging rates.