The impact of volume expansion on thermodynamic and kinetic properties of graphite/Si alloy composite anodes.

ABSTRACT: With the growing demand for high energy density and fast-charging/high-rate performance, understanding the thermodynamic and kinetic behavior of graphite/silicon composite anodes has become increasingly important. In this study, graphite/Si alloy composite electrodes containing 0-50 wt% silicon alloy were investigated using a three-electrode pouch cell combined with in situ dilation. Through this analysis, the changes in porosity after the formation cycles were determined, while the lithium-ion diffusion coefficient (D _Li⁺ ) was calculated based on the Weppner-Huggins equation. In addition, the resistance components were quantitatively evaluated by pulse polarization and electrochemical impedance spectroscopy (EIS). This study elucidates the effect of po

SUBMITTER: Lee MH 

PROVIDER: S-EPMC12679607 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature