Operando characterization of batteries using x-ray absorption spectroscopy: advances at the beamline XAFS at synchrotron Elettra

Giuliana Aquilanti (1) , Marco Giorgetti (2) , Robert Dominko (3) , Lorenzo Stievano (4, 5) , Iztok Arčon (6) , Nicola Novello (1) , Luca Olivi (1)

1 Elettra Sincrotrone Trieste
2 UNIBO - Alma Mater Studiorum Università di Bologna = University of Bologna
3 KI - National Institute of Chemistry [Llubljana]
4 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
5 RS2E - Réseau sur le stockage électrochimique de l'énergie
6 University of Nova Gorica

X-ray absorption spectroscopy is a synchrotron radiation based technique that is able to provide information on both local structure and electronic properties in a chemically selective manner. It can be used to characterize the dynamic processes that govern the electrochemical energy storage in batteries, and to shed light on the redox chemistry and changes in structure during galvanostatic cycling to design cathode materials with improved properties. Operando XAS studies have been performed at beamline XAFS at Elettra on different systems. For Li-ion batteries, a multiedge approach revealed the role of the different cathode components during the charge and discharge of the battery. In addition, Li-S batteries for automotive applications were studied. Operando sulfur K-edge XANES and EXAFS analysis was used to characterize the redox chemistry of sulfur, and to relate the electrochemical mechanism to its local structure.

Domaines: Matériaux

Giuliana Aquilanti, Marco Giorgetti, Robert Dominko, Lorenzo Stievano, Iztok Arčon, et al.. Operando characterization of batteries using x-ray absorption spectroscopy: advances at the beamline XAFS at synchrotron Elettra. Journal of Physics D: Applied Physics, 2017, 50, pp.074001. ⟨10.1088/1361-6463/aa519a⟩. ⟨hal-01442643⟩