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@ARTICLE{LePham:1039807,
author = {Le Pham, Phuong Nam and Kraft, Marvin and Zeier, Wolfgang},
title = {{S}i/{G}raphite {A}nodes for {S}olid-{S}tate {B}atteries:
{C}omposition {S}election via {E}lectrochemical and
{C}hemo-{M}echanical {P}roperties},
journal = {ACS applied materials $\&$ interfaces},
volume = {17},
number = {8},
issn = {1944-8244},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2025-01807},
pages = {12261–12270},
year = {2025},
note = {financial support within the SilKompAs funded by
Bundesministerium für Bildung und Forschung (BMBF project
03XP0486B)X-ray diffractometer was supported by the Deutsche
Forschungsgemeinschaft (DFG) under project number 459785385},
abstract = {Silicon–graphite composites are among the most widely
used anode materials in conventional lithium-ion batteries
and recently have been considered as promising candidates in
lithium-ion solid-state batteries. In this work, we
investigate the influence of the silicon content on the
electrochemical and chemo-mechanical behaviors of different
Si/graphite composites in solid-state batteries. All anode
composites show that an increase of Si presence in the
composite enhances the cyclability at a high current
density. Using direct-current (DC) polarization and
temperature-dependent electrochemical impedance
spectroscopy, we observe that both electronic and ionic
conductivities are sufficient across the composition series.
Operando stress measurements demonstrate how the internal
pressure of the anode in a solid-state battery changes as a
function of the Si content. Less Si (e.g., ≤10 wt $\%)$ in
the blended matrix offers smaller internal stress, while it
is significantly increased at 20 wt $\%$ of Si. This study
emphasizes the importance of optimizing the silicon/graphite
ratio in the anode composites to balance high battery
performance with stable chemo-mechanical properties},
cin = {IMD-4},
ddc = {600},
cid = {I:(DE-Juel1)IMD-4-20141217},
pnm = {1221 - Fundamentals and Materials (POF4-122)},
pid = {G:(DE-HGF)POF4-1221},
typ = {PUB:(DE-HGF)16},
pubmed = {39951398},
UT = {WOS:001433113600001},
doi = {10.1021/acsami.4c21587},
url = {https://juser.fz-juelich.de/record/1039807},
}