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@ARTICLE{WiemersMeyer:828990,
author = {Wiemers-Meyer, Simon and Jeremias, Sebastian and Winter,
Martin and Nowak, Sascha},
title = {{I}nfluence of {B}attery {C}ell {C}omponents and {W}ater on
the {T}hermal and {C}hemical {S}tability of {L}i{PF}6
{B}ased {L}ithium {I}on {B}attery {E}lectrolytes},
journal = {Electrochimica acta},
volume = {222},
issn = {0013-4686},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2017-02807},
pages = {1267 - 1271},
year = {2016},
abstract = {Lithium ion battery electrolytes based on LiPF6 and organic
solvents are known to degrade at elevated temperatures. The
degradation reactions can be caused either chemically e.g.
by simple contact with battery cell components and/or
electrochemically during cycling. This study is focused on
thermally induced chemical reactions of the electrolyte with
different battery cell components. These reactions are
monitored by means of quantitative NMR spectroscopy. The
results allow for categorizing the influences of the
components according to their reactivity against HF. Inert
materials (graphite, carbon black, polyvinylidene
difluoride, polyolefinic and ceramic separator) do not show
any observable influence on the thermal stability of the
electrolyte. If the materials react with HF but the reaction
does not form water in significant amounts (Li metal and
LiNi1/3Co1/3Mn1/3O2), there is also no influence observable.
In contrast to that, materials, which can form water in
contact with HF at significant rates (glass fiber separator,
Si and LiFePO4), can lead to a slightly increased or even
severe electrolyte degradation. However, if the material
neutralizes the acid HF (carboxymethyl cellulose), it
stabilizes LiPF6 against water sources. Furthermore, the
results of this study show that LiPF6 is stable at
temperatures up to 80°C, if no water sources are present.
This stability is most likely also given for even higher
temperatures.},
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:000395443700035},
doi = {10.1016/j.electacta.2016.11.100},
url = {https://juser.fz-juelich.de/record/828990},
}