December 2009In a project promoted by the DFG (German Research Foundation) the possible interface film formation between a cathode and the electrolyte of a lithium ion battery is investigated. The graph shows a TOF-SIMS depth profile of the near-surface region of a LiNi0,5Mn1,5O4 layer. The layer was deposited by PLD (pulsed laser deposition) on a silicon substrate and immersed in the electrolyte for two days at 50 °C. Fluorine is a typical ingredient of decomposition products that is enriched at the surface. Lithium is also enriched in the near surface region. Manganese in contrast can only be found in the electrode bulk. The measurements that were performed during a bachelor thesis are the first clues for a surface layer. Picture submitted by B. Michalak https://www.uni-giessen.de/en/faculties/f08/departments/physchem/janek/gallerypotm/gallery-of-pictures-from-2009/pomdec09/viewhttps://www.uni-giessen.de/@@site-logo/logo.png
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December 2009
In a project promoted by the DFG (German Research Foundation) the possible interface film formation between a cathode and the electrolyte of a lithium ion battery is investigated. The graph shows a TOF-SIMS depth profile of the near-surface region of a LiNi0,5Mn1,5O4 layer. The layer was deposited by PLD (pulsed laser deposition) on a silicon substrate and immersed in the electrolyte for two days at 50 °C. Fluorine is a typical ingredient of decomposition products that is enriched at the surface. Lithium is also enriched in the near surface region. Manganese in contrast can only be found in the electrode bulk. The measurements that were performed during a bachelor thesis are the first clues for a surface layer. Picture submitted by B. Michalak
