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@ARTICLE{Ghaur:1025081,
author = {Ghaur, Adjmal and Pfeiffer, Felix and Diddens, Diddo and
Peschel, Christoph and Dienwiebel, Iris and Du, Leilei and
Profanter, Laurin and Weiling, Matthias and Winter, Martin
and Placke, Tobias and Nowak, Sascha and Baghernejad,
Masoud},
title = {{R}ethinking the {R}ole of {F}ormerly {S}ub-{S}ufficient
{I}ndustrial/{S}ynthesized {SEI} {A}dditive {C}ompounds - a
{N}ew {P}erspective},
journal = {Meeting abstracts},
volume = {MA2023-01},
number = {7},
issn = {1091-8213},
address = {Pennington, NJ},
publisher = {Soc.},
reportid = {FZJ-2024-02669},
pages = {2753 - 2753},
year = {2023},
note = {Hierbei handelt es sich lediglich um einen Abstract.},
abstract = {In order to improve the performance of lithium-ion
batteries (LIBs), novel electrolytes are of primary
importance. Recently, fluorinated cyclic phosphazene
derivatives in combination with fluoroethylene carbonate
(FEC) are mentioned in the literature as a promising
electrolyte additive combination, which can decompose to
form a dense, uniform, and thin protective layer on the
surface of the anode and cathode electrode.[1,2]
Additionally, suppressing further electrolyte decomposition
and electrode corrosion, thus protecting the structural
destruction of the electrodes, are mentioned within this
electrolyte composition.[1–3] Furthermore, galvanostatic
charge and discharge experiments with different cell
composition materials demonstrate that fluorinated cyclic
phosphazene compounds as additional additive material tend
to improve cycling stability.[1,3,4] Although the
electrochemical aspects of cyclic fluorinated phosphazene
compounds combined with FEC are briefly introduced, it is
still not fully clear how these two compound classes
interact constructively during operation mode. Thus, the
positive synergistic effect of
FEC/Hexafluorocyclotriphosphazene (HFPN)-derivatives on the
electrochemical performance during cell operation is not
enlightened. The focus of this study is to investigate the
complementary effect of FEC and
ethoxy(pentafluoro)cyclotriphosphazene (EtPFPN) as additive
compounds in an aprotic organic electrolyte in
LiNi0.5Co0.2Mn0.3O (NCM523) SiOx/C full cells. Furthermore,
the formation mechanism of lithium ethyl methyl carbonate
(LEMC)-EtPFPN interfacial products and the reaction
mechanism of lithium alkoxide with EtPFPN are proposed and
supported with DFT measurements. Additionally, a new effect
of FEC regarding the SEI formation will be introduced. The
EtPFPN decomposition compounds in the electrolyte after the
SEI formation have been investigated via gas
chromatography-mass spectrometry (GC-MS) and gas
chromatography-high resolution mass spectrometry (GC-HRMS).
The electrode electrolyte interface investigation of the SEI
has been performed viain-situ shell-isolated nanoparticle
enhanced Raman spectroscopy (SHINERS) and scanning electron
microscopy (SEM). Constant current cycling is conducted, and
in-situ Raman measurements characterize the deposition of
electrolyte components and LEMC-EtPFPN traces on the SiOx/C
anode material during the SEI formation. Finally, the
interplay between EC, EMC, Li-alkoxide, LEMC, FEC, and
EtPFPN has been visualized schematically via a reaction
mechanism postulated based on analytical data of the
electrolyte.[1] A. Ghaur, C. Peschel, I. Dienwiebel, L.
Haneke, L. Du, L. Profanter, A. Gomez‐Martin, M. Winter,
S. Nowak, T. Placke, Adv Energy Mater2023, 2203503.[2] J.
Liu, X. Song, L. Zhou, S. Wang, W. Song, W. Liu, H. Long, L.
Zhou, H. Wu, C. Feng, Z. Guo, Nano Energy2018, 46,
404–414.[3] Q. Liu, Z. Chen, Y. Liu, Y. Hong, W. Wang, J.
Wang, B. Zhao, Y. Xu, J. Wang, X. Fan, L. Li, H. bin Wu,
Energy Storage Mater2021, 37, 521–529.[4] Y.-H. Liu, M.
Okano, T. Mukai, K. Inoue, M. Yanagida, T. Sakai, J Power
Sources2016, 304, 9–14.},
cin = {IEK-12},
ddc = {540},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {1221 - Fundamentals and Materials (POF4-122)},
pid = {G:(DE-HGF)POF4-1221},
typ = {PUB:(DE-HGF)16},
doi = {10.1149/MA2023-0172753mtgabs},
url = {https://juser.fz-juelich.de/record/1025081},
}