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@ARTICLE{Frankenstein:1025074,
author = {Frankenstein, Lars and Mohrhardt, Marvin and Peschel,
Christopher and Gomez Martin, Aurora and Placke, Tobias and
Kasnatscheew, Johannes and Winter, Martin},
title = {{S}trategies of {P}ractical {I}mplementation of {C}hemical
{P}re-{L}ithiation {U}sing {L}ithium {A}rene {C}omplex
{S}olutions: {A} {S}ystematic {S}tudy on {S}ilicon-{B}ased
{A}nodes},
journal = {Meeting abstracts},
volume = {MA2023-01},
number = {2},
issn = {1091-8213},
address = {Pennington, NJ},
publisher = {Soc.},
reportid = {FZJ-2024-02662},
pages = {519 - 519},
year = {2023},
note = {Hierbei handelt es sich lediglich um einen Abstract.},
abstract = {Currently, Lithium ion batteries (LIBs) are
state-of-the-art (SOTA) energy storage systems. There is an
urgent need for further improvements in terms of gravimetric
and volumetric energy of LIBs, for a successful market
penetration of electric vehicles. Therefore, development of
advanced negative electrode materials is of high interest.
Here, silicon (Si) is a promising active material to replace
SOTA graphite due to its ~10-fold higher specific capacity
and being also high abundant.However, Si undergoes severe
volume changes up to $280\%$ during (de-)lithiation,
resulting in fast capacity fading and short cycle life due
to the continuous re-formation of the solid electrolyte
interphase (SEI), leading to active lithium losses (ALL). In
order to counteract ALL, research is focusing on suitable
pre-lithiation processes. Among different pre-lithiation
methods, chemical pre-lithiation by application of lithium
arene complex (LAC) solutions is promising as it is a fast,
easy and cost-effective method.In this work, the stability
of three different solvents to produce a
4,4'-dimethylbiphenyl (4,4'-DMBP) LAC is investigated via
solid phase microextraction gas chromatography-mass
spectrometry method (SPME-GC-MS). The optimized LAC solution
is used to evaluate the stability of different binder
systems with respect to electrode manufacturing. Based on
these fundamental insights, different parameters such as the
reaction temperature (T) and pre-lithiation time (PL-t) are
systematically investigated regarding suitable degrees of
pre-lithiation (DOPL) of the negative electrode. DOPLs up to
a plateau of $55\%$ can be obtained by using 0.5 M 4,4'-DMBP
in tetrahydrofuran (THF) as LAC solution. Higher temperature
during the reaction reduces the PL-t until achieving a
pre-lithiation plateau. The impact of the parameters T and
PL-t towards the electrochemical performance of Si-based LIB
full cells is thoroughly investigated. It is shown that this
approach improves the cycle life of a silicon nanowire
graphite composite negative electrode up to $600\%$ compared
to the pristine electrodes},
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/MA2023-012519mtgabs},
url = {https://juser.fz-juelich.de/record/1025074},
}