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Resolving the Role of Configurational Entropy in Improving Cycling Performance of Multicomponent Hexacyanoferrate Cathodes for Sodium‐Ion Batteries

Ma, Yanjiao 1; Hu, Yang; Pramudya, Yohanes 1; Diemant, Thomas; Wang, Qingsong 1; Goonetilleke, Damian 1; Tang, Yushu ORCID iD icon 1; Zhou, Bei 1; Hahn, Horst 1; Wenzel, Wolfgang 1; Fichtner, Maximilian 1; Ma, Yuan 1; Breitung, Ben 1; Brezesinski, Torsten ORCID iD icon 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


Mn-based hexacyanoferrate (Mn-HCF) cathodes for Na-ion batteries usually suffer from poor reversibility and capacity decay resulting from unfavorable phase transitions and structural degradation during cycling. To address this issue, the high-entropy concept is here applied to Mn-HCF materials, significantly improving the sodium storage capabilities of this system via a solid-solution mechanism with minor crystallographic changes upon de-/sodiation. Complementary structural, electrochemical, and computational characterization methods are used to compare the behavior of high-, medium-, and low-entropy multicomponent Mn-HCFs resolving, to our knowledge for the first time, the link between configurational entropy/compositional disorder (entropy-mediated suppression of phase transitions, etc.) and cycling performance/stability in this promising class of next-generation cathode materials.

Verlagsausgabe §
DOI: 10.5445/IR/1000148625
Veröffentlicht am 13.07.2022
DOI: 10.1002/adfm.202202372
Zitationen: 19
Web of Science
Zitationen: 17
Zitationen: 22
Cover der Publikation
Zugehörige Institution(en) am KIT Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST)
Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Post Lithium Storage (POLiS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1616-301X, 1616-3028
KITopen-ID: 1000148625
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Weitere HGF-Programme 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
43.35.03 (POF IV, LK 01) Structural and Functional Behavior of Solid State Systems
Erschienen in Advanced Functional Materials
Verlag Wiley-VCH Verlag
Band 32
Heft 34
Seiten Art.Nr. 2202372
Vorab online veröffentlicht am 17.05.2022
Schlagwörter 2021-027-031153 TEM
Nachgewiesen in Web of Science
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