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Reversible and Irreversible Redox Processes in Li-Rich Layered Oxides

Merz, Michael; Ying, Bixian; Nagel, Peter; Schuppler, Stefan; Kleiner, Karin

Abstract (englisch):

Reversible and irreversible charge exchange reactions
of Li- and Mn-rich layered oxides (Li1.15Ni0.2Co0.1Mn0.55O2,
LLO) are investigated with bulk and surface-sensitive near-edge Xray
absorption fine structure spectroscopy (NEXAFS) at the Ni
L2,3, Co L2,3, Mn L2,3, and O K edges; mass spectrometry (MS);
and operando synchrotron X-ray powder diffraction (SXPD). The
present work shows the relation between O−O formation in the
bulk and Ni, Co, and Mn reduction/oxidation processes, which in
turn deliver outstanding capacities of Li-rich layered oxides (LLO).
Moreover, the reversibility of charge compensation reactions is
discussed and differences between O−O formation and oxygen
release, both occurring mainly upon the first charge (so-called
activation), are identified.

DOI: 10.1021/acs.chemmater.1c02573
Zitationen: 20
Web of Science
Zitationen: 19
Zitationen: 19
Zugehörige Institution(en) am KIT Institut für QuantenMaterialien und Technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2021
Sprache Englisch
Identifikator ISSN: 0897-4756, 1520-5002
KITopen-ID: 1000141037
HGF-Programm 47.11.02 (POF IV, LK 01) Emergent Quantum Phenomena
Erschienen in Chemistry of materials
Verlag American Chemical Society (ACS)
Band 33
Heft 24
Seiten 9534-9545
Vorab online veröffentlicht am 09.12.2021
Schlagwörter Final Report 2020-024-029430 WERA
Nachgewiesen in Scopus
Web of Science
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