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Battery Materials and Diagnostics Group
Our goal is to develop novel materials and to improve existing materials for Li-ion, Li-S, and exotic (Na, Mg, Ca, etc...) batteries. We apply different synthetic routes, such as sol-gel chemistry, mechanosynthesis, solid state synthesis under various controlled atmospheres, and microwave synthesis to control the morphology and obtained the most promising electrochemical performances of a dedicated systems.
Improved Interfacial Stability of Ni-rich Oxide Full-Cells
PSI researchers have identified a novel electrolyte additive, allowing extended voltage range of Ni-rich oxide full-cells, while keeping excellent performance. The instability of cathode–electrolyte interface causes the structural degradation of cathode active material and the electrolyte consumption, resulting in a rapid capacity fading and shortening battery life-time. The PSI-identified additive help to alleviate these problems and extend battery life-time.
Post mortem/operando XPEEM: for studying the surface of single particle in Li-ion battery electrodes
X-ray photoemission electron microscopy (XPEEM) with its excellent spatial resolution is a well-suited technique to elucidate the complex electrode-electrolyte interface reactions in Li-ion batteries. It provides element-specific contrast images and enables the acquisition of local X-ray absorption spectra on single particles. Here we demonstrate the strength of post mortem measurements and we show the first electrochemical cell dedicated for operando experiments in all-solid-state batteries.