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@ARTICLE{Mnnighoff:851119,
author = {Mönnighoff, Xaver and Murmann, Patrick and Weber, Waldemar
and Winter, Martin and Nowak, Sascha},
title = {{P}ost-{M}ortem {I}nvestigations of {F}luorinated {F}lame
{R}etardants for {L}ithium {I}on {B}attery {E}lectrolytes by
{G}as {C}hromatography with {C}hemical {I}onization},
journal = {Electrochimica acta},
volume = {246},
issn = {0013-4686},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2018-04821},
pages = {1042 - 1051},
year = {2017},
abstract = {Using flame retardants (FRs) in lithium ion battery (LIB)
electrolytes is usually a tradeoff between electrochemical
performance and electrolyte flammability. Fluorinated FRs
are a promising class of FRs which are currently under
investigation. During this work, three FRs originating from
triethyl phosphate with varying degree of fluorination were
investigated regarding their electrochemical stability on
cathode (LiNi0.33Co0.33Mn0.33O2, NCM) and anode (graphite)
in half cells. During long-term cycling, changes in
performance were observed. Especially on the anode side the
FR addition showed a decrease in performance in comparison
to the standard electrolyte (DEC/EC 1:1, 1M LiPF6). The
electrolytes containing the three FRs were extracted from
the cells and analyzed regarding their changes in
composition and structural degradation. The decomposition
products were investigated by gas chromatography (GC) with
electron impact (EI) ionization and mass selective (MS)
detection. To obtain more information with regard to the
identification of unknown decomposition products further
GC‐MS experiments with positive chemical ionization (PCI)
and negative chemical ionization (NCI) were performed.
Twelve different volatile organic decomposition products
were identified. These decomposition products can be
subdivided regarding their basic structure. Ether based,
carbonate based and phosphate based fluorinated and
non-fluorinated decomposition products were identified.
Furthermore, possible formation pathways for all groups of
decomposition products were postulated taking existing
literature into account.},
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:000406942800115},
doi = {10.1016/j.electacta.2017.06.125},
url = {https://juser.fz-juelich.de/record/851119},
}