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@ARTICLE{Zhang:885752,
author = {Zhang, Yufan and Ye, Ting and Chen, Ming and Goodwin,
Zachary A. H. and Feng, Guang and Huang, Jun and Kornyshev,
Alexei A.},
title = {{E}nforced {F}reedom: {E}lectric‐{F}ield‐{I}nduced
{D}eclustering of {I}onic‐{L}iquid {I}ons in the
{E}lectrical {D}ouble {L}ayer},
journal = {Energy $\&$ Environmental Materials},
volume = {3},
number = {3},
issn = {2575-0356},
address = {Hoboken},
publisher = {Wiley},
reportid = {FZJ-2020-04064},
pages = {414 - 420},
year = {2020},
abstract = {Ions in the bulk of solvent‐free ionic liquids bind into
ion pairs and clusters. The competition between the
propensity of ions to stay in a bound state, and the
reduction of the energy when unbinding in electric field,
determines the portion of free ions in the electrical double
layer. We present the simplest possible mean‐field theory
to study this effect. “Cracking” of ion pairs into free
ions in electric field is accompanied by the change of the
dielectric response of the ionic liquid. The predictions
from the theory are verified and further explored by
molecular dynamics simulations. A particular finding of the
theory is that the differential capacitance vs potential
curve displays a bell shape, despite the low concentration
of free charge carriers, because the dielectric response
reduces the threshold concentration for the bell‐ to
camel‐shape transition. The presented theory does not take
into account overscreening and oscillating charge
distributions in the electrical double layer. But in spite
of the simplicity of the model, its findings demonstrate a
clear physical effect: a preference to be a charged monopole
rather than a dipole (or higher order multipole) in strong
electric field.},
cin = {IEK-13},
ddc = {333.7},
cid = {I:(DE-Juel1)IEK-13-20190226},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000565990500001},
doi = {10.1002/eem2.12107},
url = {https://juser.fz-juelich.de/record/885752},
}