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An XPS Study of Electrolytes for Li-Ion Batteries in Full Cell LNMO vs Si/Graphite.
Azmi, Raheleh; Lindgren, Fredrik; Stokes-Rodriguez, Killian; Buga, Mihaela; Ungureanu, Cosmin; Gouveia, Tom; Christensen, Ida; Pal, Shubhadeep; Vlad, Alexandru; Ladam, Alix; Edström, Kristina; Hahlin, Maria.
Afiliación
  • Azmi R; Department of Chemistry - Ångström Laboratory, Structural Chemistry, Uppsala University, Box 538, Uppsala 751 21, Sweden.
  • Lindgren F; Department of Chemistry - Ångström Laboratory, Structural Chemistry, Uppsala University, Box 538, Uppsala 751 21, Sweden.
  • Stokes-Rodriguez K; Department of Chemistry - Ångström Laboratory, Structural Chemistry, Uppsala University, Box 538, Uppsala 751 21, Sweden.
  • Buga M; Department of Sustainable Energy Technology, SINTEF Industry, Trondheim 7491, Norway.
  • Ungureanu C; ROM-EST Laboratory, ICSI Energy Department, National Research and Development Institute for Cryogenic and Isotopic Technologies - ICSI, 4 Uzinei, Ramnicu Valcea 240050, Romania.
  • Gouveia T; ROM-EST Laboratory, ICSI Energy Department, National Research and Development Institute for Cryogenic and Isotopic Technologies - ICSI, 4 Uzinei, Ramnicu Valcea 240050, Romania.
  • Christensen I; Faculty of Energy Engineering, National University of Science and Technology POLITEHNICA Bucharest, 313 Splaiul Independentei, Bucharest 060042, Romania.
  • Pal S; Research and Innovation Department, Solvionic, Toulouse 31100, France.
  • Vlad A; Vianode, Kristiansand 4621, Norway.
  • Ladam A; Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Louvain-la-Neuve B-1348, Belgium.
  • Edström K; Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Louvain-la-Neuve B-1348, Belgium.
  • Hahlin M; Research and Innovation Department, Solvionic, Toulouse 31100, France.
ACS Appl Mater Interfaces ; 16(26): 34266-34280, 2024 Jul 03.
Article en En | MEDLINE | ID: mdl-38904375
ABSTRACT
Two different types of electrolytes (co-solvent and multi-salt) are tested for use in high voltage LiNi0.5Mn1.5O4||Si/graphite full cells and compared against a carbonate-based standard LiPF6 containing electrolyte (baseline). Ex situ postmortem XPS analysis on both anodes and cathodes over the life span of the cells reveals a continuously growing SEI and CEI for the baseline electrolyte. The cells cycled in the co-solvent electrolyte exhibited a relatively thick and long-term stable CEI (on LNMO), while a slowly growing SEI was determined to form on the Si/graphite. The multi-salt electrolyte offers more inorganic-rich SEI/CEI while also forming the thinnest SEI/CEI observed in this study. Cross-talk is identified in the baseline electrolyte cell, where Si is detected on the cathode, and Mn is detected on the anode. Both the multi-salt and co-solvent electrolytes are observed to substantially reduce this cross-talk, where the co-solvent is found to be the most effective. In addition, Al corrosion is detected for the multi-salt electrolyte mainly at its end-of-life stage, where Al can be found on both the anode and cathode. Although the co-solvent electrolyte offers superior interface properties in terms of the limitation of cross-talk, the multi-salt electrolyte offers the best overall performance, suggesting that interface thickness plays a superior role compared to cross-talk. Together with their electrochemical cycling performance, the results suggest that multi-salt electrolyte provides a better long-term passivation of the electrodes for high-voltage cells.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Estados Unidos