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@ARTICLE{Roth:1024777,
author = {Roth, Thomas and Streck, Luiza and Mujanovic, Nedim and
Winter, Martin and Niehoff, Philip and Jossen, Andreas},
title = {{T}ransient {S}elf-{D}ischarge after {F}ormation in
{L}ithium-{I}on {C}ells: {I}mpact of {S}tate-of-{C}harge and
{A}node {O}verhang},
journal = {Journal of the Electrochemical Society},
volume = {170},
number = {8},
issn = {0013-4651},
address = {Bristol},
publisher = {IOP Publishing},
reportid = {FZJ-2024-02443},
pages = {080524 -},
year = {2023},
note = {Unterstützt durch BMBF Grant: 03XP0296D und die TUM},
abstract = {A fast determination of cell quality after formation is
challenging due to transient effects in the self-discharge
measurement. This work investigated the self-discharge of
NMC622/graphite single-layer pouch cells with varying anode
dimensions to differentiate between SEI growth and anode
overhang equalization processes. The transient
self-discharge was measured directly after formation via
voltage decay and for 20 weeks of calendar storage at three
states-of-charge (SOC), $10\%,$ $30\%,$ and $50\%.$ The
transient behavior persisted for the entire measurement
duration, even at a low SOC. Still, the low SOC minimized
the impact of SEI growth and anode overhang equalization
compared to moderate SOCs. Evaluating the coulombic
efficiency from cycle aging showed a distinct capacity loss
for the first cycle after storage, indicating further SEI
growth, which stabilized in subsequent cycles. The aged
capacity after cycling showed no significant dependence on
the calendar storage, which further promotes fast
self-discharge characterization at low SOC.},
cin = {IEK-12},
ddc = {660},
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},
UT = {WOS:001057230800001},
doi = {10.1149/1945-7111/acf164},
url = {https://juser.fz-juelich.de/record/1024777},
}