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Multi‐Element Surface Coating of Layered Ni‐Rich Oxide Cathode Materials and Their Long‐Term Cycling Performance in Lithium‐Ion Batteries

Dreyer, Sören L.; Kretschmer, Katja R.; Tripković, Đorđije; Mazilkin, Andrey; Chukwu, Richard; Azmi, Raheleh; Hartmann, Pascal; Bianchini, Matteo; Brezesinski, Torsten ORCID iD icon; Janek, Jürgen

Abstract:

The energy density of layered oxide cathode materials increases with their Ni content, while the stability decreases and degradation becomes more severe. A common strategy to mitigate or prevent degradation is the application of protective coatings on the particle surfaces. In this article, a room-tem-perature, liquid-phase reaction of trimethylaluminum (TMA) and tetraethyl orthosilicate (TEOS) with adsorbed moisture on either LiNi0.85Co0.10Mn0.05O2or LiNiO2, yielding a hybrid coating that shows synergetic benefits compared to coatings from TMA and TEOS individually, is reported. The surface layer is investigated in long-term pouch full-cell studies as well as by electron micros-copy, X-ray photoelectron spectroscopy, and differential electrochemical mass spectrometry, demonstrating that it prevents degradation primarily by a fluorine-scavenging effect, and by reducing the extent of rock salt-type phase formation.


Verlagsausgabe §
DOI: 10.5445/IR/1000141633
Veröffentlicht am 04.01.2022
Originalveröffentlichung
DOI: 10.1002/admi.202101100
Scopus
Zitationen: 10
Web of Science
Zitationen: 10
Dimensions
Zitationen: 10
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 11.03.2022
Sprache Englisch
Identifikator ISSN: 2196-7350, 2196-7350
KITopen-ID: 1000141633
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Weitere HGF-Programme 43.35.03 (POF IV, LK 01) Structural and Functional Behavior of Solid State Systems
Erschienen in Advanced materials interfaces
Verlag John Wiley and Sons
Band 9
Heft 8
Seiten Art. Nr.: 2101100
Bemerkung zur Veröffentlichung Special Issue: Advanced Battery Materials and Interfaces — A European Perspective
Vorab online veröffentlicht am 10.11.2021
Schlagwörter KNMF Proposal 2020-023 028491 FIB TEM
Nachgewiesen in Scopus
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Web of Science
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