Publications by the same author
plus in the repository
plus in Google Scholar

Bibliografische Daten exportieren
 

Improved Performance of High‐Entropy Disordered Rocksalt Oxyfluoride Cathode by Atomic Layer Deposition Coating for Li‐Ion Batteries

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008339
URN to cite this document: urn:nbn:de:bvb:703-epub-8339-9

Title data

Zhou, Bei ; An, Siyu ; Kitsche, David ; Dreyer, Sören L. ; Wang, Kai ; Huang, Xiaohui ; Thanner, Jannik ; Bianchini, Matteo ; Brezesinski, Torsten ; Breitung, Ben ; Hahn, Horst ; Wang, Qingsong:
Improved Performance of High‐Entropy Disordered Rocksalt Oxyfluoride Cathode by Atomic Layer Deposition Coating for Li‐Ion Batteries.
In: Small Structures. Vol. 5 (2024) Issue 7 . - 2400005.
ISSN 2688-4062
DOI der Verlagsversion: https://doi.org/10.1002/sstr.202400005

[thumbnail of Small Structures - 2024 - Zhou - Improved Performance of High‐Entropy Disordered Rocksalt Oxyfluoride Cathode by Atomic.pdf]
Format: PDF
Name: Small Structures - 2024 - Zhou - Improved Performance of High‐Entropy Disordered Rocksalt Oxyfluoride Cathode by Atomic.pdf
Version: Published Version
Available under License Creative Commons BY 4.0: Attribution
Download (3MB)

Project information

Project title:
Project's official title
Project's id
Open Access Publizieren
No information

Abstract

Lithium-excess cation-disordered rocksalt materials are a promising class of transition metal-based cathodes that exhibit high specific capacity and energy density. The exceptional performance is achieved through participation of anionic redox in addition to cationic redox reactions in the electrochemistry. However, anionic redox reactions accompanied by oxygen evolution, accelerated electrolyte breakdown, and structural evolution lead to voltage hysteresis and low initial Coulombic efficiency. Herein, an Al2O3 layer with varying thickness has been coated onto a high-entropy disordered rocksalt oxyfluoride cathode through atomic layer deposition to enhance battery performance. The results indicate that the utilization of a uniform Al2O3 coating improves the capacity retention and rate capability of the cathode, with the performance being strongly dependent on the layer thickness. Further investigation into cathode–electrolyte interfacial reactions reveals that the thin protecting Al2O3 coating can reduce the decomposition of electrolyte on the cathode surface but cannot prevent bulk phase degradation during prolonged cycling. These findings highlight the need for optimized coating design on the disordered rocksalt cathode to improve battery performance.

Further data

Item Type: Article in a journal
Keywords: atomic layer deposition; cathode–electrolyte interface; disordered rocksalt;
lithium-ion batteries
DDC Subjects: 500 Science > 540 Chemistry
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Lehrstuhl Anorganische Aktivmaterialien für elektrochemische Energiespeicher
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Lehrstuhl Anorganische Aktivmaterialien für elektrochemische Energiespeicher > Lehrstuhl Anorganische Aktivmaterialien für elektrochemische Energiespeicher - Univ.-Prof. Dr. Matteo Bianchini
Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Research Institutions
Research Institutions > Central research institutes
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-8339-9
Date Deposited: 21 Mar 2025 11:09
Last Modified: 21 Mar 2025 11:10
URI: https://epub.uni-bayreuth.de/id/eprint/8339

Downloads

Downloads per month over past year