SensOLiB — Infrared fiber optic operando spectroscopy
Product description
National collaborative project (2023-2027)
The SensOLiB project, a collaboration with the Rennes Green and Ceramic Laboratory and the Collège de France, introduced for the first time in the battery sector an operando chemistry monitoring using infrared optical fibers. This innovative method makes it possible to identify parasitic chemical species that form in commercial batteries under real operating conditions, during charging and discharging.
- Li-ion and Na-ion batteries
- Mid-Infrared spectroscopy
- Chalcogenide glass fibers
- Silica FBGs
INFRARED FIBER OPTIC OPERANDO SPECTROSCOPY
The project aims to characterize the chemical species involved in the formation of the solid electrolyte interface (SEI) layer that forms during the battery cycle. It also aims to examine the impact of additives on the stability of the electrolyte. The study will include operando analyses of the electrodes and gases produced during cycling.
To do this, mid-infrared evanescent wave spectroscopy will be used with chalcogenide glass optical fibers provided by Rennes green and ceramic laboratory. Silica fibers Bragg grating supplied by IDIL will also be integrated into the batteries, in addition to the chalcogenide fibers.
The combination of these two types of fibers will make it possible to develop a multiparameter sensor capable of providing complete chemical and physical characterization in a single step. By developing this technology, SensOLiB aims to discover unexplored avenues for designing new batteries offering increased reliability and performance, thus contributing to the advancement of energy technologies.
PARTNERS
- ANR
- Collège de France
- IDIL
- ISCR
