title: Intercalation and delamination of layered carbides and carbonitrides.
abstract: 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.
authors.affiliation: Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Olha
authors.initials: O
authors.lastname: Mashtalir
authors.forename: Michael
authors.initials: M
authors.lastname: Naguib
authors.forename: Vadym N
authors.initials: VN
authors.lastname: Mochalin
authors.forename: Yohan
authors.initials: Y
authors.lastname: Dall'Agnese
authors.forename: Min
authors.initials: M
authors.lastname: Heon
authors.forename: Michel W
authors.initials: MW
authors.lastname: Barsoum
authors.forename: Yury
authors.initials: Y
authors.lastname: Gogotsi