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@ARTICLE{Streipert:828976,
author = {Streipert, Benjamin and Janßen, Pia and Cao, Xia and
Kasnatscheew, Johannes and Wagner, Ralf and Cekic-Laskovic,
Isidora and Winter, Martin and Placke, Tobias},
title = {{E}valuation of {A}llylboronic {A}cid {P}inacol {E}ster as
{E}ffective {S}hutdown {O}vercharge {A}dditive for {L}ithium
{I}on {C}ells},
journal = {Journal of the Electrochemical Society},
volume = {164},
number = {2},
issn = {1945-7111},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2017-02793},
pages = {A168 - A172},
year = {2017},
abstract = {Allylboronic acid pinacol ester (ABPE) was investigated as
shutdown overcharge additive to increase the intrinsic
safety of lithium ion cells during operation at elevated
charge cutoff potentials up to 4.5 V vs. Li/Li+. It was
demonstrated that the additive had no negative influence on
the cycling performance of LiNi1/3Co1/3Mn1/3O2
(NMC-111)/graphite full cells operated in a standard
operation voltage range between 2.5 V and 4.2 V.
Electrochemical impedance spectroscopy was used to study the
influence of the electrolyte additive on the impedance
before and after overcharge and concomitant cell shutdown.
Thereby, an immense increase in the charge transfer
resistance after electrode shutdown was observed, thus,
hinting to the formation of a lithium ion-insulating layer
on the positive electrode surface. To further elucidate the
working principle of the shutdown additive, surface
investigations by means of scanning electron microscopy and
X-ray photoelectron spectroscopy were carried out. The
existence of a surface layer consisting mainly of polymeric
species was proven. The presented results open up a new
family of compounds for overcharge protection},
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:000397850800112},
doi = {10.1149/2.0711702jes},
url = {https://juser.fz-juelich.de/record/828976},
}