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Article Dans Une Revue Energy & Environmental Science Année : 2024

Operando observation of the dynamic SEI formation on a carbonaceous electrode by near-ambient pressure XPS

Résumé

The dynamic formation of chemical species composing the solid electrolyte interphase (SEI) layer at the surface of a carbonaceous electrode in a carbonate-based liquid electrolyte was observed in real-time using operando near-ambient pressure XPS (NAP-XPS). The potential of the glassy carbon electrode vs. metallic lithium was controlled during the XPS experiment. By following the binding energy shifts as a function of applied potential, we could identify the main SEI species and observe their deposition on the electrode surface during the formation of the SEI. These results demonstrate that NAP-XPS is a powerful tool to investigate the SEI formation and stability in Li- and post-Li-ion batteries, paving the way for future studies on the effect of electrolyte additives and solvent mixtures on battery performance.
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vendredi 27 septembre 2024
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Dates et versions

hal-04498177 , version 1 (27-03-2024)

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F. Capone, J. Sottmann, V. Meunier, L. Pérez Ramírez, A. Grimaud, et al.. Operando observation of the dynamic SEI formation on a carbonaceous electrode by near-ambient pressure XPS. Energy & Environmental Science, 2024, 17 (4), pp.1509-1519. ⟨10.1039/d3ee03228k⟩. ⟨hal-04498177⟩
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