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Alkylammonium Cation Intercalation into Ti3C2 (MXene): Effects on Properties and Ion-Exchange Capacity Estimation
Drexel University, PA 19104 USA.
Drexel University, PA 19104 USA.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Drexel University, PA 19104 USA.
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2017 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 29, no 3, 1099-1106 p.Article in journal (Refereed) Published
Abstract [en]

Ti3C2Tx MXene intercalated with Li+ ions was produced and ion-exchanged with a series of trimethylalkylammonium (AA) cations of increasing alkyl chain length. A discontinuous expansion in the MXene layer spacing was observed, attributed to complete packing of the interlayer space at a critical chain length. The latter was used to estimate the number of cations per Ti3C2 formula unit, which was found to be in good agreement with a similar quantification obtained from X-ray photoelectron spectroscopy, energy-dispersive spectroscopy, and elemental analysis. The system was also modeled using density functional theory and molecular dynamics, arriving at cation concentrations in the same range. The intercalated AA cations led to tunable increases in resistivity of the normally highly electrically conductive MXene and were investigated as interlayer pillars in electrochemical capacitors.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2017. Vol. 29, no 3, 1099-1106 p.
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-136170DOI: 10.1021/acs.chemmater.6b04234ISI: 000394924100027OAI: oai:DiVA.org:liu-136170DiVA: diva2:1086657
Note

Funding Agencies|U.S. National Science Foundation [DMR-1310245]; National Science Foundation [283036-3304]; Knut and Alice Wallenberg (KAW) Foundation; Swedish Foundation for Strategic Research (SSF) through the synergy grant FUNCASE

Available from: 2017-04-03 Created: 2017-04-03 Last updated: 2017-04-03

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Halim, JosephNedfors, NilsRosén, Johanna
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