Li, TianyiZhou, XinweiCui, YiMeyerson, Melissa L.Weeks, Jason A.Mullins, BuddieDe Andrade, VincentDe Carlo, FrancescoLiu, YuziZhu, Likun2022-03-212022-03-212021-03Li, T., Zhou, X., Cui, Y., Meyerson, M. L., Weeks, J. A., Buddie Mullins, C., De Andrade, V., De Carlo, F., Liu, Y., & Zhu, L. (2021). In-Situ Characterization of Dynamic Morphological and Phase Changes of Selenium-doped Germanium Using a Single Particle Cell and Synchrotron Transmission X-ray Microscopy. ChemSusChem, 14(5), 1370–1376. https://doi.org/10.1002/cssc.202002776https://hdl.handle.net/1805/28217The dynamic information of lithium-ion battery active materials obtained from coin cell-based in-situ characterizations might not represent the properties of the active material itself because many other factors in the cell could have impacts on the cell performance. To address this problem, a single particle cell was developed to perform the in-situ characterization without the interference of inactive materials in the battery electrode as well as the X-ray-induced damage. In this study, the dynamic morphological and phase changes of selenium-doped germanium (Ge0.9Se0.1) at the single particle level were investigated via synchrotron-based in-situ transmission X-ray microscopy. The results demonstrate the good reversibility of Ge0.9Se0.1 at high cycling rate that helps understand its good cycling performance and rate capability. This in-situ and operando technique based on a single particle battery cell provides an approach to understanding the dynamic electrochemical processes of battery materials during charging and discharging at the particle level.enPublisher Policyin situ characterizationlithium ion batteryselenium-doped germaniumArticle