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Mapping the free energy of lithium solvation in the protic ionic liquid Ethylammonuim Nitrate: A metadynamics study


Kachmar, Ali; Carignano, Marcelo; Laino, Teodoro; Iannuzzi, Marcella; Hutter, Jürg (2017). Mapping the free energy of lithium solvation in the protic ionic liquid Ethylammonuim Nitrate: A metadynamics study. ChemSusChem, 10:3083-3090.

Abstract

The understanding of lithium solvation and transport in ionic liquids is important due to the possible applications in electrochemical devices. Using first principles simulations aided with the metadynamics approach we study the free energy landscape for lithium at infinite dilution conditions in ethylammonium nitrate, a protic ionic liquid. We analyze the local structure of the liquid around the lithium cation and find a quantitative picture in agreement with experimental findings. Our simulations show that the lowest two free energy minima correspond to conformations with the lithium solvated either by 3 or 4 nitrates ions with a transition barrier between them of 0.2 eV. Other less probable conformations having a different solvation pattern are also investigated.

Abstract

The understanding of lithium solvation and transport in ionic liquids is important due to the possible applications in electrochemical devices. Using first principles simulations aided with the metadynamics approach we study the free energy landscape for lithium at infinite dilution conditions in ethylammonium nitrate, a protic ionic liquid. We analyze the local structure of the liquid around the lithium cation and find a quantitative picture in agreement with experimental findings. Our simulations show that the lowest two free energy minima correspond to conformations with the lithium solvated either by 3 or 4 nitrates ions with a transition barrier between them of 0.2 eV. Other less probable conformations having a different solvation pattern are also investigated.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Uncontrolled Keywords:General Energy, General Materials Science, General Chemical Engineering, Environmental Chemistry
Language:English
Date:2017
Deposited On:04 Jul 2018 12:52
Last Modified:19 Aug 2018 09:36
Publisher:Wiley-VCH Verlag
ISSN:1864-5631
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1002/cssc.201700510

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