TY  - JOUR
AU  - Le Pham, Phuong Nam
AU  - Kraft, Marvin
AU  - Zeier, Wolfgang
TI  - Si/Graphite Anodes for Solid-State Batteries: Composition Selection via Electrochemical and Chemo-Mechanical Properties
JO  - ACS applied materials & interfaces
VL  - 17
IS  - 8
SN  - 1944-8244
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2025-01807
SP  - 12261–12270
PY  - 2025
N1  - 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
AB  - 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
LB  - PUB:(DE-HGF)16
C6  - 39951398
UR  - <Go to ISI:>//WOS:001433113600001
DO  - DOI:10.1021/acsami.4c21587
UR  - https://juser.fz-juelich.de/record/1039807
ER  -