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Evaluation of Sn$_{0.9}$Fe$_{0.1}$O$_{2‐ δ}$ as Potential Anode Material for Sodium‐Ion Batteries

Lenzer, Anja 1; Birrozzi, Adele 1; Wirsching, Anna-Lena 2; Li, Yueliang; Geiger, Dorin; Kaiser, Ute; Asenbauer, Jakob 1; Bresser, Dominic 1
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)

Abstract:

The introduction of transition metals such as iron in oxides of alloying elements as, for instance, SnO$_2$ has been proven to enable higher capacities and superior charge storage performance when used as lithium-ion electrode materials. Herein, we report the evaluation of such electrode materials, precisely (carbon-coated) Sn$_{0.9}$Fe$_{0.1}$O$_{2−δ}$(−C), for sodium-ion battery applications. The comparison with SnO$_2$ as reference material reveals the beneficial impact of the presence of iron in the tin oxide lattice, enabling higher specific capacities and a greater reversibility of the de-/sodiation process – just like for lithium-ion battery applications. The overall achievable capacity, however, remains relatively low with about 300 mAh g$^{−1}$ and up to more than 400 mAh g$^{−1}$ for Sn$_{0.9}$Fe$_{0.1}$O$_{2-δ}$ and Sn$_{0.9}$Fe$_{0.1}$O$_{2−δ}$-C, respectively, compared to the theoretical specific capacity of more than 1,300 mAh g$^{−1}$ when assuming a completely reversible alloying and conversion reaction. The subsequently performed ex situ/operando XRD and ex situ TEM/EDX analysis unveils that this limited capacity results from an incomplete de-/sodiation reaction, thus, providing valuable insights towards an enhanced understanding of alternative reaction mechanisms for sodium-ion anode material candidates.


Verlagsausgabe §
DOI: 10.5445/IR/1000161482
Veröffentlicht am 29.09.2023
Originalveröffentlichung
DOI: 10.1002/batt.202300281
Scopus
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2566-6223
KITopen-ID: 1000161482
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Batteries and Supercaps
Verlag John Wiley and Sons
Band 6
Heft 11
Seiten Art.-Nr.: e202300281
Vorab online veröffentlicht am 01.08.2023
Schlagwörter Sn0.9Fe0.1O2−δ, conversion-alloying, anode, sodium, battery
Nachgewiesen in Dimensions
Scopus
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