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Impact of the Transition Metal Dopant in Zinc Oxide Lithium-Ion Anodes on the Solid Electrolyte Interphase Formation

Eisenmann, Tobias; Asenbauer, Jakob; Rezvani, Seyed Javad; Diemant, Thomas; Behm, Rolf Jürgen; Geiger, Dorin; Kaiser, Ute; Passerini, Stefano; Bresser, Dominic

Abstract:
Conversion/alloying materials (CAMs) provide substantially higher specific capacities than graphite, the state‐of‐the‐art lithium‐ion battery anode material. The ability to host much more lithium per unit weight and volume is, however, accompanied by significant volume changes, which challenges the realization of a stable solid electrolyte interphase (SEI). Herein, the comprehensive characterization of the composition and evolution of the SEI on transition metal (TM) doped zinc oxide as CAM model compound, is reported, with a particular focus on the impact of the TM dopant (Fe or Co). The results unveil that the presence of iron specifically triggers the electrolyte decomposition. However, this detrimental effect can be avoided by stabilizing the interface with the electrolyte by a carbonaceous coating. These findings provide a great leap forward toward the enhanced understanding of such doped materials and (transition) metal oxide active materials in general.

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Verlagsausgabe §
DOI: 10.5445/IR/1000129559
Veröffentlicht am 11.02.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2366-9608
KITopen-ID: 1000129559
Erschienen in Small methods
Verlag Wiley-VCH Verlag
Seiten Art.-Nr.: 2001021
Nachgewiesen in Dimensions
Scopus
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