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@ARTICLE{Huesker:851138,
author = {Huesker, Jessica and Froböse, Linus and Kwade, Arno and
Winter, Martin and Placke, Tobias},
title = {{I}n {S}itu {D}ilatometric {S}tudy of the {B}inder
{I}nfluence on the {E}lectrochemical {I}ntercalation of
{B}is(trifluoromethanesulfonyl) imide {A}nions into
{G}raphite},
journal = {Electrochimica acta},
volume = {257},
issn = {0013-4686},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2018-04840},
pages = {423 - 435},
year = {2017},
abstract = {Dual-ion or dual-graphite batteries based on the mechanism
of electrochemical anion intercalation into a graphite
cathode have become attractive as an alternative storage
technology in recent years. Due to large volume changes of
the graphite particles during electrochemical anion
intercalation, an appropriate electrode binder is required
to sustain the mechanical integrity of the composite
electrode and a stable and highly reversible
charge/discharge cycling. Therefore, the expansion and
contraction behavior of graphite positive electrodes
containing different binders, including Na-carboxymethyl
cellulose (CMC), poly(vinylidene)difluoride (PVdF) and a
CMC/styrene butadiene rubber (SBR) mixture, during anion
intercalation/de-intercalation was investigated by in situ
electrochemical dilatometry (ECD). These measurements give
insights into reversible and irreversible relative height
changes at different cycling conditions and, thus, into the
long-term cycling stability of the composite
electrodes.Long-term cycling measurements reveal that the
maximum and minimum electrode thicknesses of PVdF-based
electrodes remain constant during anion
intercalation/de-intercalation, while the CMC-containing
electrodes exhibit a thickness increase in the first cycles
and subsequent decrease after reaching a maximum electrode
thickness. This instability can most likely be correlated
with the mechanical instability of the electrode due to the
high stiffness of the CMC binder compared to PVdF and an
active material contact loss during cycling. If CMC is
applied as binder mixture in combination with SBR, which
shows a high flexibility, the thickness decay can be
decreased. Our results give new insights into the
optimization potentials of composite electrodes for
carbon-based cathodes in dual-ion cells that experience
large volume expansion during cycling.},
cin = {IEK-12},
ddc = {540},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000414067900047},
doi = {10.1016/j.electacta.2017.10.042},
url = {https://juser.fz-juelich.de/record/851138},
}