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Lithium containing layered high entropy oxide structures

Wang, Junbo; Cui, Yanyan; Wang, Qingsong; Wang, Kai; Huang, Xiaohui; Stenzel, David; Sarkar, Abhishek; Azmi, Raheleh; Bergfeldt, Thomas; Bhattacharya, Subramshu S.; Kruk, Robert; Hahn, Horst; Schweidler, Simon; Brezesinski, Torsten; Breitung, Ben

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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000126009
Veröffentlicht am 17.11.2020
DOI: 10.1038/s41598-020-75134-1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Angewandte Materialien - Energiespeichersysteme (IAM-ESS)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000126009
Erschienen in Scientific reports
Band 10
Seiten Art.-Nr.: 18430
Nachgewiesen in Scopus
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