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@ARTICLE{Mathies:905105,
author = {Mathies, Lena and Diddens, Diddo and Dong, Dengpan and
Bedrov, Dmitry and Leipner, Hartmut},
title = {{T}ransport mechanism of lithium ions in non-coordinating
{P}({V}d{F}-{HFP}) copolymer matrix},
journal = {Solid state ionics},
volume = {357},
issn = {0167-2738},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2022-00397},
pages = {115497 -},
year = {2020},
abstract = {Polymer films based on poly(vinylidene
difluoride-co-hexafluoropropylene) (P(VdF-HFP)) with
different amounts of bis(trifluoromethane)sulfonimide
lithium salt (LiTfSI) were prepared from acetone solution in
a doctor blade casting machine under controlled and
reproducible drying conditions.The modification of the
copolymer-based layers show a significant enhancement of
conductivity over several orders of magnitude for increasing
LiTfSI content and a constantly low electronic conductivity.
The addition of salt results in a structural change of the
crystalline areas in the semi-crystalline copolymer matrix
from α- to γ-phase of P(VdF), which has been studied using
Raman spectroscopy and X-Ray diffraction. Lithium ions are
coordinated by oxygen atoms of TfSI− as verified by Raman
spectroscopy and molecular dynamics simulations. Based on
the experimental data and simulation results, we propose a
transport mechanism for the lithium ions through salt
channels in the amorphous regions of the non-coordinating
copolymer matrix via hopping between stabilized positions.},
cin = {IEK-12},
ddc = {530},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {131 - Electrochemical Storage (POF3-131) / 1221 -
Fundamentals and Materials (POF4-122)},
pid = {G:(DE-HGF)POF3-131 / G:(DE-HGF)POF4-1221},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000591907000020},
doi = {10.1016/j.ssi.2020.115497},
url = {https://juser.fz-juelich.de/record/905105},
}