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001039807 1001_ $$0P:(DE-HGF)0$$aLe Pham, Phuong Nam$$b0$$eCorresponding author
001039807 245__ $$aSi/Graphite Anodes for Solid-State Batteries: Composition Selection via Electrochemical and Chemo-Mechanical Properties
001039807 260__ $$aWashington, DC$$bSoc.$$c2025
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001039807 500__ $$afinancial support within the SilKompAs funded by Bundesministerium für Bildung und Forschung (BMBF project 03XP0486B)X-ray diffractometer was supported by the Deutsche Forschungsgemeinschaft (DFG) under project number 459785385
001039807 520__ $$aSilicon–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
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001039807 7001_ $$0P:(DE-Juel1)192207$$aKraft, Marvin$$b1$$ufzj
001039807 7001_ $$0P:(DE-Juel1)184735$$aZeier, Wolfgang$$b2$$eCorresponding author$$ufzj
001039807 773__ $$0PERI:(DE-600)2467494-1$$a10.1021/acsami.4c21587$$gp. acsami.4c21587$$n8$$p12261–12270$$tACS applied materials & interfaces$$v17$$x1944-8244$$y2025
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