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@ARTICLE{Gerlitz:1005280,
author = {Gerlitz, Anna I. and Diddens, Diddo and Grünebaum, Mariano
and Heuer, Andreas and Winter, Martin and Wiemhöfer,
Hans-Dieter},
title = {{P}olypropylene carbonate-based electrolytes as model for a
different approach towards improved ion transport properties
for novel electrolytes},
journal = {Physical chemistry, chemical physics},
volume = {25},
number = {6},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2023-01398},
pages = {4810 - 4823},
year = {2023},
abstract = {Linear poly(alkylene carbonates) such as polyethylene
carbonate (PEC) and polypropylene carbonate (PPC) have
gained increasing interest due to their remarkable ion
transport properties such as high Li+ transference numbers.
The cause of these properties is not yet fully understood
which makes it challenging to replicate them in other
polymer electrolytes. Therefore, it is critical to
understand the underlying mechanisms in polycarbonate
electrolytes such as PPC. In this work we present insights
from impedance spectroscopy, transference number
measurements, PFG-NMR, IR and Raman spectroscopy as well as
molecular dynamics simulations to address this issue. We
find that in addition to plasticization, the lithium ion
coordination by the carbonate groups of the polymer is
weakened upon gelation, leading to a rapid exhange of the
lithium ion solvation shell and consequently a strong
increase of the conductivity. Moreover, we study the impact
of the anions by employing different conducting salts.
Interestingly, while the total conductivity decreases with
increasing anion size, the reverse trend can be observed for
the lithium ion transference numbers. Via our holistic
approach, we demonstrate that this behavior can be
attributed to differences in the collective ion dynamics.},
cin = {IEK-12},
ddc = {540},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {1221 - Fundamentals and Materials (POF4-122)},
pid = {G:(DE-HGF)POF4-1221},
typ = {PUB:(DE-HGF)16},
pubmed = {36692378},
UT = {WOS:000917744100001},
doi = {10.1039/D2CP03756D},
url = {https://juser.fz-juelich.de/record/1005280},
}