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@ARTICLE{Qi:829007,
author = {Qi, Xin and Tao, Liang and Hahn, Hendrik and Schultz,
Carola and Gallus, Dennis Roman and Cao, Xia and Nowak,
Sascha and Röser, Stephan and Li, Jie and Cekic-Laskovic,
Isidora and Rezaei Rad, Babak and Winter, Martin},
title = {{L}ifetime limit of tris(trimethylsilyl) phosphite as
electrolyte additive for high voltage lithium ion batteries},
journal = {RSC Advances},
volume = {6},
number = {44},
issn = {2046-2069},
address = {London},
publisher = {RSC Publishing},
reportid = {FZJ-2017-02824},
pages = {38342 - 38349},
year = {2016},
abstract = {The tris(trimethylsilyl) phosphite (TMSPi) is considered as
an ideal electrolyte additive for lithium ion batteries. In
this work, its positive effect as well as its failure
mechanism in a LiPF6 containing electrolyte was studied by
means of selected electrochemical, structural and analytical
techniques. The LiNi0.5Co0.2Mn0.3O2/graphite cells with
TMSPi as electrolyte additive were cycled between 2.8 and
4.6 V. Thanks to the compact cathode electrolyte interphase
formed by the oxidative decomposition of TMSPi in a freshly
prepared TMSPi containing electrolyte, both the discharge
capacity and the cycling stability of cells were enhanced.
However, our results also show that TMSPi actually reacts
with LiPF6 at room temperature. TMSPi is consumed by this
spontaneous reaction after aging for certain time. In
addition, a part of the fluorophosphates, generated from the
hydrolysis of LiPF6, is bonded to one or two TMS groups,
causing a decrease in the fluorophosphate content in the CEI
film. Consequently, the cycling stability of the lithium ion
cells with aged TMSPi containing electrolyte deteriorates.
The obtained results offer important insights into the
practical application of TMSPi, which means that TMSPi can
only be used as an effective additive in a freshly prepared
LiPF6 containing electrolyte.},
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:000374495400106},
doi = {10.1039/C6RA06555D},
url = {https://juser.fz-juelich.de/record/829007},
}