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Title: Self-Amplified Surface Charging and Partitioning of Ionic Liquids in Nanopores

Here, we study ion partitioning and self-charging of nanoporous electrodes with room-temperature ionic liquids using a classical density-functional theory that accounts for molecular-excluded volume effects and electrostatic correlations. Nanopores of zero electrical potential are predicted to favor adsorption of small ions even without specific surface attraction, and the imbalanced distributions of cations and anions inside the pore induces a net surface charge that promotes further enrichment of small ions. The self-amplified ion partitioning is most significant when the nanopore and the ionic species are of comparable dimension.
Authors:
 [1] ;  [2] ;  [2] ; ORCiD logo [3] ;  [1]
  1. Univ. of California, Riverside, CA (United States)
  2. Drexel Univ., Philadelphia, PA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 8; Journal Issue: 3; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1479795
Alternate Identifier(s):
OSTI ID: 1394028

Neal, Justin N., Van Aken, K. L., Gogotsi, Yuri G., Wesolowski, David J., and Wu, Jianzhong. Self-Amplified Surface Charging and Partitioning of Ionic Liquids in Nanopores. United States: N. p., Web. doi:10.1103/PhysRevApplied.8.034018.
Neal, Justin N., Van Aken, K. L., Gogotsi, Yuri G., Wesolowski, David J., & Wu, Jianzhong. Self-Amplified Surface Charging and Partitioning of Ionic Liquids in Nanopores. United States. doi:10.1103/PhysRevApplied.8.034018.
Neal, Justin N., Van Aken, K. L., Gogotsi, Yuri G., Wesolowski, David J., and Wu, Jianzhong. 2017. "Self-Amplified Surface Charging and Partitioning of Ionic Liquids in Nanopores". United States. doi:10.1103/PhysRevApplied.8.034018. https://www.osti.gov/servlets/purl/1479795.
@article{osti_1479795,
title = {Self-Amplified Surface Charging and Partitioning of Ionic Liquids in Nanopores},
author = {Neal, Justin N. and Van Aken, K. L. and Gogotsi, Yuri G. and Wesolowski, David J. and Wu, Jianzhong},
abstractNote = {Here, we study ion partitioning and self-charging of nanoporous electrodes with room-temperature ionic liquids using a classical density-functional theory that accounts for molecular-excluded volume effects and electrostatic correlations. Nanopores of zero electrical potential are predicted to favor adsorption of small ions even without specific surface attraction, and the imbalanced distributions of cations and anions inside the pore induces a net surface charge that promotes further enrichment of small ions. The self-amplified ion partitioning is most significant when the nanopore and the ionic species are of comparable dimension.},
doi = {10.1103/PhysRevApplied.8.034018},
journal = {Physical Review Applied},
number = 3,
volume = 8,
place = {United States},
year = {2017},
month = {9}
}

Works referenced in this record:

Ionic-liquid materials for the electrochemical challenges of the future
journal, July 2009
  • Armand, Michel; Endres, Frank; MacFarlane, Douglas R.
  • Nature Materials, Vol. 8, Issue 8, p. 621-629
  • DOI: 10.1038/nmat2448

High temperature carbon�carbon supercapacitor using ionic liquid as electrolyte
journal, March 2007