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

Neal, Justin N.; Van Aken, K. L.; Gogotsi, Yuri G.; Wesolowski, David J.; Wu, Jianzhong

doi:10.1103/PhysRevApplied.8.034018

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

Abstract

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:

Neal, Justin N. ^[1]; Van Aken, K. L. ^[2]; Gogotsi, Yuri G. ^[2];

^[3]; Wu, Jianzhong ^[1]

Univ. of California, Riverside, CA (United States)
Drexel Univ., Philadelphia, PA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Fri Sep 22 00:00:00 EDT 2017

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1479795

Alternate Identifier(s):: OSTI ID: 1394028

Grant/Contract Number:: AC05-00OR22725

Resource 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)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    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., 2017. 
Web.  doi:10.1103/PhysRevApplied.8.034018.

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                    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.  https://doi.org/10.1103/PhysRevApplied.8.034018

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                    Neal, Justin N., Van Aken, K. L., Gogotsi, Yuri G., Wesolowski, David J., and Wu, Jianzhong. Fri .  
"Self-Amplified Surface Charging and Partitioning of Ionic Liquids in Nanopores".  United States.  https://doi.org/10.1103/PhysRevApplied.8.034018.  https://www.osti.gov/servlets/purl/1479795.

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@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         = {Fri Sep 22 00:00:00 EDT 2017},

  month        = {Fri Sep 22 00:00:00 EDT 2017}

}

Copy to clipboard

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

Abstract

Citation Formats

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Complex Capacitance Scaling in Ionic Liquids-Filled Nanopores
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Structures and correlation functions of multicomponent and polydisperse hard-sphere mixtures from a density functional theory
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Outstanding performance of activated graphene based supercapacitors in ionic liquid electrolyte from −50 to 80°C
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