Suchen
Publications 2015
Electrochemistry Laboratory (LEC)
An overview about all-solid-state batteries research activities and characterization capabilities at PSI
All-solid-state batteries (ASSBs) are forecasted to play a central role in the next generation of high energy density and safe storage devices. However, ASSBs still an immature technology and require further advancements on multiple fronts like interface (electro-)chemical and mechanical instabilities. Here, we provide an overview about PSI efforts in (i) employing advanced operando laboratory and synchrotron-based analytical methods to shed light into the various degradation mechanisms and (ii) our capabilities for interface chemical engineering.
Operando X-ray photoelectron spectroscopy, to monitor the chemical and electronic interface evolution in all-solid-state batteries
Degradation of the solid-electrolyte interface occurring during cycling is currently one of the most challenging issues for the development of all-solid-state batteries. Here we designed a unique electrochemical custom made cell for operando X-ray photoelectron spectroscopy (XPS) capable of maintaining high mechanical pressure with reliable electrochemistry and able to monitor in real-time the surface (electro-)chemical reactivity at the interfaces between the different composite.
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.
Excellent cycling stability of graphite in all-solid-state battery using sulfide solid electrolyte
All-solid-state lithium ion batteries represent a promising battery technology for boosting the volumetric energy density and promising a superior safety. In this study excellent cycling stability of graphite anode material have been demonstrated in combination with sulfide-based solid electrolyte. Furthermore we evaluated the stability of the graphite-electrolyte interface by analyzing the normalized cumulative irreversible charge during cycling experiments.