Effect of Metal Ion Intercalation on the Structure of MXene and Water Dynamics on its Internal Surfaces

Naresh C. Osti, Michael Naguib, Alireza Ostadhossein, Yu Xie, Paul R.C. Kent, Boris Dyatkin, Gernot Rother, William T. Heller, Adri C.T. Van Duin, Yury Gogotsi, Eugene Mamontov

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Abstract

MXenes are a recently discovered class of 2D materials with an excellent potential for energy storage applications. Because MXene surfaces are hydrophilic and attractive interaction forces between the layers are relatively weak, water molecules can spontaneously intercalate at ambient humidity and significantly influence the key properties of this 2D material. Using complementary X-ray and neutron scattering techniques, we demonstrate that intercalation with potassium cations significantly improves structural homogeneity and water stability in MXenes. In agreement with molecular dynamics simulations, intercalated potassium ions reduce the water self-diffusion coefficient by 2 orders of magnitude, suggesting greater stability of hydrated MXene against changing environmental conditions.

Original languageEnglish (US)
Pages (from-to)8859-8863
Number of pages5
JournalACS Applied Materials and Interfaces
Volume8
Issue number14
DOIs
StatePublished - Apr 27 2016

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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    Osti, N. C., Naguib, M., Ostadhossein, A., Xie, Y., Kent, P. R. C., Dyatkin, B., Rother, G., Heller, W. T., Van Duin, A. C. T., Gogotsi, Y., & Mamontov, E. (2016). Effect of Metal Ion Intercalation on the Structure of MXene and Water Dynamics on its Internal Surfaces. ACS Applied Materials and Interfaces, 8(14), 8859-8863. https://doi.org/10.1021/acsami.6b01490