Humidity Exposure Enhances Microscopic Mobility in a Room-Temperature Ionic Liquid in MXene
Abstract
Present and future electrochemical devices employing advanced electrode and electrolyte materials are expected to operate in diverse environments, where they are exposed to variable conditions, such as changing humidity levels. Such conditions can possibly alter the microscopic mechanisms that influence the electrochemical performance. Here in this paper, using quasi-elastic neutron scattering and molecular dynamics simulations, we investigate the influence of humidity exposure on a room-temperature ionic liquid, [EMIm+][Tf2N–], in Ti3C2Tx MXene. Absorbed water enhances the microscopic mobility of confined [EMIm+][Tf2N–], even though the ionic liquid itself is not very hygroscopic. The absorbed water molecules predominantly reside on the termination groups of the more hydrophilic MXene layers, thereby displacing the ions from the surface and facilitating their motions in the MXene matrix.
- Authors:
-
[1];
[2];
[3];
[1];
[3];
[1]
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Vanderbilt Univ., Nashville, TN (United States). Dept. of Chemical and Biomolecular Engineering
- Drexel Univ., Philadelphia, PA (United States). A. J. Drexel Nanotechnology Inst., and Dept. of Materials Science and Engineering
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1488704
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physical Chemistry. C
- Additional Journal Information:
- Journal Volume: 122; Journal Issue: 48; Journal ID: ISSN 1932-7447
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Osti, Naresh C., Thompson, Matthew W., Van Aken, Katherine L., Alhabeb, Mohamed, Tyagi, Madhusudan, Keum, Jong-Kahk, Cummings, Peter T., Gogotsi, Yury, and Mamontov, Eugene. Humidity Exposure Enhances Microscopic Mobility in a Room-Temperature Ionic Liquid in MXene. United States: N. p., 2018.
Web. doi:10.1021/acs.jpcc.8b09677.
Osti, Naresh C., Thompson, Matthew W., Van Aken, Katherine L., Alhabeb, Mohamed, Tyagi, Madhusudan, Keum, Jong-Kahk, Cummings, Peter T., Gogotsi, Yury, & Mamontov, Eugene. Humidity Exposure Enhances Microscopic Mobility in a Room-Temperature Ionic Liquid in MXene. United States. https://doi.org/10.1021/acs.jpcc.8b09677
Osti, Naresh C., Thompson, Matthew W., Van Aken, Katherine L., Alhabeb, Mohamed, Tyagi, Madhusudan, Keum, Jong-Kahk, Cummings, Peter T., Gogotsi, Yury, and Mamontov, Eugene. Mon .
"Humidity Exposure Enhances Microscopic Mobility in a Room-Temperature Ionic Liquid in MXene". United States. https://doi.org/10.1021/acs.jpcc.8b09677. https://www.osti.gov/servlets/purl/1488704.
@article{osti_1488704,
title = {Humidity Exposure Enhances Microscopic Mobility in a Room-Temperature Ionic Liquid in MXene},
author = {Osti, Naresh C. and Thompson, Matthew W. and Van Aken, Katherine L. and Alhabeb, Mohamed and Tyagi, Madhusudan and Keum, Jong-Kahk and Cummings, Peter T. and Gogotsi, Yury and Mamontov, Eugene},
abstractNote = {Present and future electrochemical devices employing advanced electrode and electrolyte materials are expected to operate in diverse environments, where they are exposed to variable conditions, such as changing humidity levels. Such conditions can possibly alter the microscopic mechanisms that influence the electrochemical performance. Here in this paper, using quasi-elastic neutron scattering and molecular dynamics simulations, we investigate the influence of humidity exposure on a room-temperature ionic liquid, [EMIm+][Tf2N–], in Ti3C2Tx MXene. Absorbed water enhances the microscopic mobility of confined [EMIm+][Tf2N–], even though the ionic liquid itself is not very hygroscopic. The absorbed water molecules predominantly reside on the termination groups of the more hydrophilic MXene layers, thereby displacing the ions from the surface and facilitating their motions in the MXene matrix.},
doi = {10.1021/acs.jpcc.8b09677},
journal = {Journal of Physical Chemistry. C},
number = 48,
volume = 122,
place = {United States},
year = {2018},
month = {11}
}
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Works referencing / citing this record:
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