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@ARTICLE{Esen:1024374,
author = {Esen, E. and Mohrhardt, M. and Lennartz, P. and de Meatza,
I. and Schmuck, M. and Winter, M. and Paillard, E.},
title = {{E}ffect of prelithiation with passivated lithium metal
powder on passivation films on high-energy {NMC}-811 and
{S}i{C}x electrodes},
journal = {Materials today / Chemistry},
volume = {30},
issn = {2468-5194},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Ltd.},
reportid = {FZJ-2024-02124},
pages = {101587 -},
year = {2023},
abstract = {The effect of prelithiation using passivated lithium metal
powder (PLMP) pressed onto SiCx anodes is reported for
NMC-811‖ SiCx cells with high energy mass loadings. The
effect of prelithiation degree and storage time after cell
assembly on the formation and growth of the solid
electrolyte interphase (SEI) was elucidated by impedance
spectroscopy (EIS) and operando solid-state 7Li nuclear
magnetic resonance (NMR) spectroscopy, which allowed
determining the optimal storage period for the prelithiated
cells. The galvanostatic intermittent titration technique
(GITT) was used to compare apparent Li+ diffusion
coefficients in prelithiated and non-prelithiated SiCx
electrodes. Furthermore, we show that the electrochemical
performance of NMC-811‖ SiCx cells can be dramatically
improved by prelithiation using PLMP. In particular, cycle
life at $80\%$ state of health (SoH) is almost tripled,
increasing from 80 to 228 cycles. Moreover, X-ray
photoelectron spectroscopy (XPS) and energy dispersive X-ray
(EDX) analysis show that the composition of the cathode
electrolyte interphase (CEI) is also markedly modified
compared with non-prelithiated reference cells. In
particular, the amount of LixPFyOz species is reduced as
prelithiation using PLMP promotes a more effective SEI layer
on the SiCx electrode, richer in LiF and Li3PO4, and richer
in organic components that probably also contribute to the
enhanced cycling stability.},
cin = {IEK-12},
ddc = {600},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {1223 - Batteries in Application (POF4-122) / 1222 -
Components and Cells (POF4-122) / 1221 - Fundamentals and
Materials (POF4-122) / SPIDER - Safe and Prelithiated hIgh
energy DEnsity batteries based on sulphur Rocksalt and
silicon chemistries (814389)},
pid = {G:(DE-HGF)POF4-1223 / G:(DE-HGF)POF4-1222 /
G:(DE-HGF)POF4-1221 / G:(EU-Grant)814389},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001017064200001},
doi = {10.1016/j.mtchem.2023.101587},
url = {https://juser.fz-juelich.de/record/1024374},
}