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

Title data

Ma, Yanjiao ; Hu, Yang ; Pramudya, Yohanes ; Diemant, Thomas ; Wang, Qingsong ; Goonetilleke, Damian ; Tang, Yushu ; Zhou, Bei ; Hahn, Horst ; Wenzel, Wolfgang ; Fichtner, Maximilian ; Ma, Yuan ; Breitung, Ben ; Brezesinski, Torsten:
Resolving the Role of Configurational Entropy in Improving Cycling Performance of Multicomponent Hexacyanoferrate Cathodes for Sodium-Ion Batteries.
In: Advanced Functional Materials. Vol. 32 (2022) Issue 34 . - 2202372.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.202202372

Official URL: Volltext

Project information

Project title:
Project's official title
Project's id
Nachwuchsgruppe Lehrstuhl für Anorganische Aktivmaterialien electrochemischer Speicher Dr. Qingsong Wang
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Abstract in another language

Abstract 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.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: high-entropy materials; manganese-based hexacyanoferrates; phase transitions; secondary batteries; sodium-ion cathodes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Lehrstuhl Anorganische Aktivmaterialien für elektrochemische Energiespeicher
Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Research Institutions
Research Institutions > Central research institutes
Result of work at the UBT: No
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 02 Nov 2022 08:20
Last Modified: 24 Oct 2023 13:54
URI: https://eref.uni-bayreuth.de/id/eprint/72588