Operando analysis and monitoring of lithium in Li-ion batteries using nuclear microanalysis

Autor: Surblé, S, Paireau, C, Gauthier, M, Khodja, H, Martin, J-F
Přispěvatelé: Palacin, Serge, Laboratoire d'Etudes des Eléments Légers (LEEL - UMR 3685), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre Armoricain de Recherches en Environnement, Département de l'électricité et de l'hydrogène dans les transports (DEHT), Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: International Operando Battery Days
International Operando Battery Days, May 2022, Grenoble, France
Popis: International audience; Lithium-ion technology holds a prominent place in the battery’s area. Although its energy densities increased and the number of cycles raised as high as thousands, it still needs vast improvements to meet ever-greater demands regarding autonomy, lifespan, safety and miniaturization. Capacity fading during cycling remains a major problem limiting battery lifetime. It is therefore necessary to understand the origin of aging phenomena leading to loss of electrochemical performance in order to guide research towards new materials. For this, many in situ / operando studies have been developed (XPS, MET, NMR, XRD ...)[1]. However, none of the techniques mentioned can directly detect the lithium element, which makes the visualization and quantification of all the lithium present in an electrode or a battery impossible. Nuclear microanalysis is a technique capable of giving quantitative and qualitative information on spatial distributions of light elements such as lithium [2]. It is therefore a tool with great potential for understanding the mechanisms in lithium insertion materials. In previous ex situ studies, we showed immobilization of lithium in the LiFePO4 electrode during the first charge / discharge cycles [3]. We further developed an electrochemical cell coupled to the nuclear microprobe to perform in situ / operando analyzes[4].The cell is capable of providing electrochemical performances comparable to those obtained with conventional electrochemical cells on the first two cycles. We thus observed operando the formation of a SEI layer at the electrode / electrolyte interface and the trapping of lithium in a LiFePO4 // LiPF6 in EC-DEC // graphite assembly. The use of a liquid electrolyte creates complications for the analyses: it flows from the assembly to the cell window, rendering the interpretation of results difficult. The use of solid electrolyte in all solid-state batteries should give more information about the parasite electrochemical reaction (composition and thickness).
Databáze: OpenAIRE
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