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@ARTICLE{Wagner:828986,
author = {Wagner, Ralf and Korth, Martin and Streipert, Benjamin and
Kasnatscheew, Johannes and Gallus, Dennis R. and Brox,
Sebastian and Amereller, Marius and Cekic-Laskovic, Isidora
and Winter, Martin},
title = {{I}mpact of {S}elected {L}i{PF} $_{6}$ {H}ydrolysis
{P}roducts on the {H}igh {V}oltage {S}tability of
{L}ithium-{I}on {B}attery {C}ells},
journal = {ACS applied materials $\&$ interfaces},
volume = {8},
number = {45},
issn = {1944-8252},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2017-02803},
pages = {30871 - 30878},
year = {2016},
abstract = {Diverse LiPF6 hydrolysis products evolve during lithium-ion
battery cell operation at elevated operation temperatures
and high operation voltages. However, their impact on the
formation and stability of the electrode/electrolyte
interfaces is not yet investigated and understood. In this
work, literature-known hydrolysis products of LiPF6 dimethyl
fluorophosphate (DMFP) and diethyl fluorophosphate (DEFP)
were synthesized and characterized. The use of DMFP and DEFP
as electrolyte additive in 1 M LiPF6 in EC:EMC (1:1, by wt)
was investigated in LiNi1/3Mn1/3Co1/3O2/Li half cells. When
charged to a cutoff potential of 4.6 V vs Li/Li+, the
additive containing cells showed improved cycling stability,
increased Coulombic efficiencies, and prolonged shelf life.
Furthermore, low amounts (1 wt $\%$ in this study) of the
aforementioned additives did not show any negative effect on
the cycling stability of graphite/Li half cells. DMFP and
DEFP are susceptible to oxidation and contribute to the
formation of an effective cathode/electrolyte interphase as
confirmed by means of electrochemical stability window
determination, and X-ray photoelectron spectroscopy
characterization of pristine and cycled electrodes, and they
are supported by computational calculations.},
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:000388429600024},
doi = {10.1021/acsami.6b09164},
url = {https://juser.fz-juelich.de/record/828986},
}