%0 Journal Article
%A Le Pham, Phuong Nam
%A Kraft, Marvin
%A Zeier, Wolfgang
%T Si/Graphite Anodes for Solid-State Batteries: Composition Selection via Electrochemical and Chemo-Mechanical Properties
%J ACS applied materials & interfaces
%V 17
%N 8
%@ 1944-8244
%C Washington, DC
%I Soc.
%M FZJ-2025-01807
%P 12261–12270
%D 2025
%Z 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
%X 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
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 39951398
%U <Go to ISI:>//WOS:001433113600001
%R 10.1021/acsami.4c21587
%U https://juser.fz-juelich.de/record/1039807