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Layered Oxide Material as a Highly Stable Na‐ion Source and Sink for Investigation of Sodium‐ion Battery Materials

Wu, Fanglin 1; Li, Huihua 1; Diemant, Thomas 2; Mullaliu, Angelo 1; Zhang, Huang 1; Passerini, Stefano 2
1 Karlsruher Institut für Technologie (KIT)
2 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

Investigating Na-ion battery (SIB) materials is complicated by the absence of a well-performing (reference) electrode material since sodium metal cannot be considered as a quasi-reference electrode. Taking advantage of the activity of both Ni and Mn, herein, the P2-type and Mn-rich Na$_{0.6}$Ni$_{0.22}$Al$_{0.11}$Mn$_{0.66}$O$_2$ (NAM) material, known to be an excellent positive electrode, is investigated as a negative electrode. To prove NAM stability as both positive and negative electrode, symmetric cells have been assembled without pre-sodiation, which showed a reversible capacity of 73 mA h g$^{−1}$ and a remarkable capacity retention of 82.6 % after 500 cycles. The outstanding cycling performance is ascribed to the high stability of the active material at both the highest and lowest Na-ion storage plateaus and the rather limited electrolyte decomposition and solid-electrolyte-interphase (SEI) formation occurring. The long-term stability of NAM at both electrodes enables its use as a “reference” electrode for the investigation of other positive and negative electrode materials for SIBs, resembling the role played by lithium titanate (LTO) and lithium iron phosphate (LFP) in LIBs.


Verlagsausgabe §
DOI: 10.5445/IR/1000166105
Veröffentlicht am 02.01.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2024
Sprache Englisch
Identifikator ISSN: 2196-0216
KITopen-ID: 1000166105
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in ChemElectroChem
Verlag John Wiley and Sons
Band 11
Heft 3
Seiten Art.-Nr.: e202300529
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 19.12.2023
Schlagwörter Na-ion battery, P2-type Mn-rich cathode, symmetric cells, SEI-less, reference electrode
Nachgewiesen in Dimensions
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