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Impacts of Mg doping on the structural properties and degradation mechanisms of a Li and Mn rich layered oxide cathode for lithium-ion batteries
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Document Title
Impacts of Mg doping on the structural properties and degradation mechanisms of a Li and Mn rich layered oxide cathode for lithium-ion batteries
Author
Kaewmala S. Kamma N. Buakeaw S. Limphirat W. Nash J. Srilomsak S. Limthongkul P. Meethong N.
Affiliations
Institute of Nanomaterials Research and Innovation for Energy (IN-RIE) Khon Kaen University Khon Kaen 40002 Thailand; Materials Science and Nanotechnology Program Department of Physics Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand; National Energy Technology Center National Science and Technology Development Agency 111 Thailand Science Park Phaholyothin Rd. Klong 1 Pathumthani Klong Luang 12120 Thailand; Synchrotron Light Research Institute 111 University Avenue Suranaree Muang Nakhon Ratchasima 30000 Thailand
Type
Article
Source Title
Scientific Reports
ISSN
20452322
Year
2023
Volume
13
Issue
1
Open Access
All Open Access Gold Green
Publisher
Nature Research
DOI
10.1038/s41598-023-31492-0
Abstract
The Li- and Mn-rich layered oxide cathode material class is a promising cathode material type for high energy density lithium-ion batteries. However this cathode material type suffers from layer to spinel structural transition during electrochemical cycling resulting in energy density losses during repeated cycling. Thus improving structural stability is an essential key for developing this cathode material family. Elemental doping is a useful strategy to improve the structural properties of cathode materials. This work examines the influences of Mg doping on the structural characteristics and degradation mechanisms of a Li1.2Mn0.4Co0.4O2 cathode material. The results reveal that the prepared cathode materials are a composite exhibiting phase separation of the Li2MnO3 and LiCoO2 components. Li2MnO3 and LiCoO2 domain sizes decreased as Mg content increased altering the electrochemical mechanisms of the cathode materials. Moreover Mg doping can retard phase transition resulting in reduced structural degradation. Li1.2Mn0.36Mg0.04Co0.4O2 with optimal Mg doping demonstrated improved electrochemical performance. The current work provides deeper understanding about the roles of Mg doping on the structural characteristics and degradation mechanisms of Li-and Mn-rich layered oxide cathode materials which is an insightful guideline for the future development of high energy density cathode materials for lithium-ion batteries. ? 2023 The Author(s).
License
CC BY
Rights
Authors
Publication Source
WOS