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@ARTICLE{Kubot:917541,
author = {Kubot, Maximilian and Frankenstein, Lars and Muschiol,
Elisabeth and Klein, Sven and Esselen, Melanie and Winter,
Martin and Nowak, Sascha and Kasnatscheew, Johannes},
title = {{L}ithium {D}ifluorophosphate: {B}oon for {H}igh {V}oltage
{L}i {I}on {B}atteries and a {B}ane for high {T}hermal
{S}tability/low {T}oxicity: {T}owards {S}ynergistic
{D}ual‐{A}dditives to {C}ircumvent this {D}ilemma},
journal = {ChemSusChem},
volume = {16},
number = {6},
issn = {1864-5631},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2023-00744},
pages = {e202202189},
year = {2023},
note = {Zudem gefördert durch: BMWK "Go3”(03ETE002D)},
abstract = {The specific energy/energy density of state-of-the-art
(SOTA) Li-ion batteries can be increased by raising the
upper charge voltage. However, instability of SOTA cathodes
(i. e., LiNiyCoxMnyO2; x+y+z=1; NCM) triggers electrode
crosstalk through enhanced transition metal (TM) dissolution
and contributes to severe capacity fade; in the worst case,
to a sudden death (“roll-over failure”). Lithium
difluorophosphate (LiDFP) as electrolyte additive is able to
boost high voltage performance by scavenging dissolved TMs.
However, LiDFP is chemically unstable and rapidly decomposes
to toxic (oligo)organofluorophosphates (OFPs) at elevated
temperatures; a process that can be precisely analyzed by
means of high-performance liquid chromatography–high
resolution mass spectroscopy. The toxicity of LiDFP can be
proven by the well-known acetylcholinesterase inhibition
test. Interestingly, although fluoroethylene carbonate (FEC)
is inappropriate for high voltage applications as a single
electrolyte additive due to rollover failure, it is able to
suppress formation of toxic OFPs. Based on this, a
synergistic LiDFP/FEC dual-additive approach is suggested in
this work, showing characteristic benefits of both
individual additives (good capacity retention at high
voltage in the presence of LiDFP and decreased OFP
formation/toxicity induced by FEC).},
cin = {IEK-12},
ddc = {540},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {1221 - Fundamentals and Materials (POF4-122) / BMBF
03XP0311B - BatgasMod - Batteriegasungs-Modellierung
(03XP0311B)},
pid = {G:(DE-HGF)POF4-1221 / G:(BMBF)03XP0311B},
typ = {PUB:(DE-HGF)16},
pubmed = {36533855},
UT = {WOS:000916026500001},
doi = {10.1002/cssc.202202189},
url = {https://juser.fz-juelich.de/record/917541},
}