Ion-Exchange and Cation Solvation Reactions in Ti 3 C 2 MXene

Ti3C2 and other two-dimensional transition metal carbides known as MXenes are currently being explored for many applications involving intercalated ions, from electrochemical energy storage, to contaminant sorption from water, to selected ion sieving. We report here a systematic investigation of ion exchange in Ti3C2 MXene and its hydration/dehydration behavior. We have investigated the effects of the presence of LiCl during the chemical etching of the MAX phase Ti3AlC2 into MXene Ti3C2Tx (T stands for surface termination) and found that the resulting MXene has Li+ cations in the interlayer space. We successfully exchanged the Li+ cations with K+, Na+, Rb+, Mg2+, and Ca2+ (supported by X-ray photoelectron and…

• NS
  National Science Foundation

  Awards: 283036-3304, DMR-1310245, 1310245
• UD
  U.S. Department of Energy
• DU
  Drexel University
• SF
  Stiftelsen för Strategisk Forskning
• V
  Vetenskapsrådet

  Awards: 2012-4430, 621-2012-4430
• OO
  Office of Science
• DO
  Division of Materials Research

  Award: DMR-1310245
• DO
  Division of Graduate Education

  Award: 283036-3304
• BE
  Basic Energy Sciences
• OR
  Oak Ridge National Laboratory