title: Radiolysis as a solution for accelerated ageing studies of electrolytes in Lithium-ion batteries.
abstract: Diethyl carbonate and dimethyl carbonate are prototype examples of eco-friendly solvents used in lithium-ion batteries. Nevertheless, their degradation products affect both the battery performance and its safety. Therefore, it is of paramount importance to understand the reaction mechanisms involved in the ageing processes. Among those, redox processes are likely to play a critical role. Here we show that radiolysis is an ideal tool to generate the electrolytes degradation products. The major gases detected after irradiation (H2, CH4, C2H6, CO and CO2) are identified and quantified. Moreover, the chemical compounds formed in the liquid phase are characterized by different mass spectrometry techniques. Reaction mechanisms are then proposed. The detected products are consistent with those of the cycling of Li-based cells. This demonstrates that radiolysis is a versatile and very helpful tool to better understand the phenomena occurring in lithium-ion batteries.
authors.affiliation: Institut Rayonnement Matière de Saclay, LIDyL et Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux UMR 3299 CNRS/CEA SIS2M Laboratoire de Radiolyse, Bâtiment 546, F-91191 Gif-sur-Yvette, France.
authors.forename: Daniel
authors.initials: D
authors.lastname: Ortiz
authors.affiliation: Laboratoire de Chimie-Physique, UMR 8000 CNRS Université Paris Sud, Faculté des Sciences, Bâtiment 349, F-91405 Orsay, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Steinmetz
authors.affiliation: CEA/Saclay, DEN/DANS/DPC/SECR/LRMO, F-91191 Gif-sur-Yvette, France.
authors.forename: Delphine
authors.initials: D
authors.lastname: Durand
authors.affiliation: CEA/Saclay, DEN/DANS/DPC/SECR/LRMO, F-91191 Gif-sur-Yvette, France.
authors.forename: Solène
authors.initials: S
authors.lastname: Legand
authors.affiliation: CEA/Saclay, DEN/DANS/DPC/SECR/LRMO, F-91191 Gif-sur-Yvette, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Dauvois
authors.affiliation: Laboratoire de Chimie-Physique, UMR 8000 CNRS Université Paris Sud, Faculté des Sciences, Bâtiment 349, F-91405 Orsay, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Maître
authors.affiliation: Institut Rayonnement Matière de Saclay, LIDyL et Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux UMR 3299 CNRS/CEA SIS2M Laboratoire de Radiolyse, Bâtiment 546, F-91191 Gif-sur-Yvette, France.
authors.forename: Sophie
authors.initials: S
authors.lastname: Le Caër