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

F. G. Capone, J. Sottmann, V. Meunier, L. Pérez Ramírez, A. Grimaud, A. Iadecola, M. Scardamaglia, J. P. Rueff, R. Dedryvère

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

Sammanfattning

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.

Originalspråkengelska
TidskriftEnergy and Environmental Science
DOI
StatusE-pub ahead of print - 2024

Ämnesklassifikation (UKÄ)

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