In
Situ and Operando Morphology Study of Germanium–Selenium Alloy
Anode for Lithium-Ion Batteries
Posted on 2020-06-22 - 15:43
Selenium-doped
germanium (GeSe) micrometer-sized particles have been reported with
good cycling performance and rate capability due to a Li–Se–Ge
network formed during the first lithiation that provides a Li-ion
fast pathway. To understand the effect of the Li–Se–Ge
network at a high cycling rate, we monitored the morphology change
of both pure Ge and GeSe particles during cycling with an in situ/operando
focused-ion beam-scanning electron microscope method. Our results
showed that the proposed inactive Li–Se–Ge network can
provide fast Li-ion transport and also buffer volume variation, resulting
in homogeneous volume change and uniform microstructural evolution.
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Zhou, Xinwei; Li, Tianyi; Cui, Yi; Meyerson, Melissa L.; Weeks, Jason A.; Mullins, C. Buddie; et al. (2020). In
Situ and Operando Morphology Study of Germanium–Selenium Alloy
Anode for Lithium-Ion Batteries. ACS Publications. Collection. https://doi.org/10.1021/acsaem.0c01148