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Synergistic Effect of Co and Mn Co-Doping on SnO$_2$ Lithium-Ion Anodes

Birrozzi, Adele 1; Mullaliu, Angelo 1; Eisenmann, Tobias 1; Asenbauer, Jakob 1; Diemant, Thomas 1; Geiger, Dorin; Kaiser, Ute; Oliveira de Souza, Danilo; Ashton, Thomas E.; Groves, Alexandra R.; Darr, Jawwad A.; Passerini, Stefano 1; Bresser, Dominic 1
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

The incorporation of transition metals (TMs) such as Co, Fe, and Mn into SnO$_2$ substantially improves the reversibility of the conversion and the alloying reaction when used as a negative electrode active material in lithium-ion batteries. Moreover, it was shown that the specific benefits of different TM dopants can be combined when introducing more than one dopant into the SnO$_2$ lattice. Herein, a careful characterization of Co and Mn co-doped SnO$_2$ via transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy and X-ray diffraction including Rietveld refinement is reported. Based on this in-depth investigation of the crystal structure and the distribution of the two TM dopants within the lattice, an ex situ X-ray photoelectron spectroscopy and ex situ X-ray absorption spectroscopy were performed to better understand the de-/lithiation mechanism and the synergistic impact of the Co and Mn co-doping. The results specifically suggest that the antithetical redox behaviour of the two dopants might play a decisive role for the enhanced reversibility of the de-/lithiation reaction.


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Originalveröffentlichung
DOI: 10.3390/inorganics10040046
Scopus
Zitationen: 6
Web of Science
Zitationen: 5
Dimensions
Zitationen: 6
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 2304-6740
KITopen-ID: 1000145922
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Inorganics
Verlag MDPI
Band 10
Heft 4
Seiten Art.-Nr.: 46
Vorab online veröffentlicht am 01.04.2022
Nachgewiesen in Scopus
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Web of Science
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