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Lithium containing layered high entropy oxide structures

Wang, Junbo 1; Cui, Yanyan 1; Wang, Qingsong 1; Wang, Kai; Huang, Xiaohui; Stenzel, David 1; Sarkar, Abhishek 1; Azmi, Raheleh 2; Bergfeldt, Thomas ORCID iD icon 3; Bhattacharya, Subramshu S.; Kruk, Robert 1; Hahn, Horst 1; Schweidler, Simon 1; Brezesinski, Torsten ORCID iD icon 1; Breitung, Ben 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)
3 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)


Layered Delafossite-type Lix(M$_{1}$M$_{2}$M$_{3}$M$_{4}$M$_{5}$…M$_{n}$)O$_{2}$ materials, a new class of high-entropy oxides, were synthesized by nebulized spray pyrolysis and subsequent high-temperature annealing. Various metal species (M = Ni, Co, Mn, Al, Fe, Zn, Cr, Ti, Zr, Cu) could be incorporated into this structure type, and in most cases, single-phase oxides were obtained. Delafossite structures are well known and the related materials are used in different fields of application, especially in electrochemical energy storage (e.g., LiNi$_{x}$Co$_{y}$Mn$_{z}$O$_{2}$ [NCM]). The transfer of the high-entropy concept to this type of materials and the successful structural replication enabled the preparation of novel compounds with unprecedented properties. Here, we report on the characterization of a series of Delafossite-type high-entropy oxides by means of TEM, SEM, XPS, ICP-OES, Mössbauer spectroscopy, XRD including Rietveld refinement analysis, SAED and STEM mapping and discuss about the role of entropy stabilization. Our experimental data indicate the formation of uniform solid-solution structures with some Li/M mixing.

Verlagsausgabe §
DOI: 10.5445/IR/1000126009
Veröffentlicht am 17.11.2020
DOI: 10.1038/s41598-020-75134-1
Zitationen: 36
Zitationen: 43
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS)
Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000126009
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in Scientific reports
Verlag Nature Research
Band 10
Seiten Art.-Nr.: 18430
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter 2019-023-028229, TEM, FIB
Nachgewiesen in Dimensions
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