February 2021In-Depth Characterization of Lithium Metal SurfacesThe use of lithium metal as anode is an intensively explored option to significantly increase the energy density of batteries. As lithium is highly reactive, its surface is natively covered with a passivation layer that affects the cell performance. However, the passivation layer is mostly not considered and characterized. Therefore, we systematically characterized various lithium samples with X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS) and complementary energy-dispersive X-ray spectroscopy (EDX), to give a complete three-dimensional chemical picture of the surface passivation layer. Besides, we explored the factors influencing the passivation layer and the experimental design which is needed to reliably characterize a highly reactive analyte like lithium. (Picture submitted by Svenja Otto.)https://www.uni-giessen.de/en/faculties/f08/departments/physchem/janek/gallerypotm/pom2021/BdM0221.jpg/viewhttps://www.uni-giessen.de/@@site-logo/logo.png
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February 2021
In-Depth Characterization of Lithium Metal SurfacesThe use of lithium metal as anode is an intensively explored option to significantly increase the energy density of batteries. As lithium is highly reactive, its surface is natively covered with a passivation layer that affects the cell performance. However, the passivation layer is mostly not considered and characterized. Therefore, we systematically characterized various lithium samples with X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS) and complementary energy-dispersive X-ray spectroscopy (EDX), to give a complete three-dimensional chemical picture of the surface passivation layer. Besides, we explored the factors influencing the passivation layer and the experimental design which is needed to reliably characterize a highly reactive analyte like lithium. (Picture submitted by Svenja Otto.)
