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@ARTICLE{Kubot:1024894,
author = {Kubot, Maximilian and Balke, Lisa and Scholz, Johannes and
Wiemers-Meyer, Simon and Karst, Uwe and Hayen, Heiko and
Hur, Hyuck and Winter, Martin and Kasnatscheew, Johannes and
Nowak, Sascha},
title = {{H}igh‐{V}oltage {I}nstability of {V}inylene {C}arbonate
({VC}): {I}mpact of {F}ormed {P}oly‐{VC} on {I}nterphases
and {T}oxicity},
journal = {Advanced science},
volume = {11},
number = {1},
issn = {2198-3844},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2024-02545},
pages = {2305282},
year = {2024},
note = {Unterstützt durch BMBF Grant: “BatGasMod” (03XP0311C),
BMWK Grant: "Go3” (03ETE002D)},
abstract = {Full exhaustion in specific energy/energy density of
state-of-the-art LiNixCoyMnzO2 (NCM)-based Li-ion batteries
(LIB) is currently limited for reasons of NCM stability by
upper cut-off voltages (UCV) below 4.3 V. At higher UCV,
structural decomposition triggers electrode crosstalk in the
course of enhanced transition metal dissolution and leads to
severe specific capacity/energy fade; in the worst case to a
sudden death phenomenon (roll-over failure). The additive
lithium difluorophosphate (LiDFP) is known to suppress this
by scavenging dissolved metals, but at the cost of enhanced
toxicity due to the formation of organofluorophosphates
(OFPs). Addition of film-forming electrolyte additives like
vinylene carbonate (VC) can intrinsically decrease OFP
formation in thermally aged LiDFP-containing electrolytes,
though the benefit of this dual-additive approach can be
questioned at higher UCVs. In this work, VC is shown to
decrease the formation of potentially toxic OFPs within the
electrolyte during cycling at conventional UCVs but triggers
OFP formation at higher UCVs. The electrolyte contains
soluble VC-polymerization products. These products are
formed at the cathode during VC oxidation (and are found
within the cathode electrolyte interphase (CEI), suggesting
an OFP electrode crosstalk of VC decomposition species, as
the OFP-precursor molecules are shown to be formed at the
anode.},
cin = {IEK-12},
ddc = {624},
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 = {37939283},
UT = {WOS:001096887600001},
doi = {10.1002/advs.202305282},
url = {https://juser.fz-juelich.de/record/1024894},
}