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@ARTICLE{Hildenbrand:996727,
author = {Hildenbrand, Felix and Ditscheid, Dominik and Barbers,
Elias and Sauer, Dirk Uwe},
title = {{I}nfluence of the anode overhang on the open-circuit
voltage and the ageing of lithium-ion batteries—{A} model
based study},
journal = {Applied energy},
volume = {332},
issn = {0306-2619},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2023-01147},
pages = {120395},
year = {2023},
abstract = {The anode overhang has been proven to be a non-negligible
influencing factor in the ageing trajectory of lithium-ion
batteries. It acts through the transfer of active lithium
between the anode overhang and the active anode by changing
reversibly the cell balancing. In this work, the anode
overhang is proven to influence the open-circuit voltage.
Through a high-precision measurement, a persistent rise of
the open-circuit voltage was observed, which we have
demonstrated to originate in the anode overhang effect. The
dimensions and structure of the anode overhang were verified
by a post-mortem analysis of the cell and matched with the
voltage behaviour. Derived from this finding, an existing
electrical–thermal ageing model was extended to allow the
simulation of the interaction between the anode overhang and
the capacity. With a Bayesian optimisation approach, the
extended model allowed to drastically improve model
parametrisation when ageing test data include an increase in
capacity. The resulting model was verified with the
simulation of two ageing profiles, each including varying
ageing conditions and phases of capacity recovery. The model
allows ageing predictions with a deviation below $4\%$ of
the remaining capacity after more than 750 days of ageing.
The model is publicly available as part of an open-source
project.},
cin = {IEK-12},
ddc = {620},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {1223 - Batteries in Application (POF4-122)},
pid = {G:(DE-HGF)POF4-1223},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000909829500001},
doi = {10.1016/j.apenergy.2022.120395},
url = {https://juser.fz-juelich.de/record/996727},
}