Elucidating the Role of Intralayer Cation Ordering and Disordering in Li 0.6 [Li 0.2 Mn 0.8 ]O 2 Cathode Materials
Rattachement africain : Rwanda, cn. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
ABSTRACT Full‐manganese (Mn) Li‐rich materials have gained attention owing to the limited availability of cobalt‐ or nickel‐based cathodes commonly used in batteries, which greatly restricts their potential for large‐scale application. However, their practical implementation is hindered by the rapid voltage/capacity decay during cycling and the long‐standing problem of redox kinetics due to their poor ionic conductivity based on the ordered honeycomb structure. In this study, the kinetic and thermodynamic properties of intralayer disordered and ordered Li‐rich full‐Mn‐based cathode materials were compared, demonstrating that the disordered Li 0.6 [Li 0.2 Mn 0.8 ]O 2 (D‐LMO) delivers a significant advantage of rate capability over the ordered Li 0.6 [Li 0.2 Mn 0.8 ]O 2 (O‐LMO). Meanwhile, the D‐LMO keeps superior capacity retention of up to 99% after 50 cycles under 25 mA g −1 . In comparsion, the capacity retention of the O‐LMO drops to just 70%, and its average discharge voltage is 0.2 V lower than that of the D‐LMO. Herein, we conducted systematic density functional theory (DFT) simulations, focusing on the electronic structure modulation governing the voltage platform between the ordered and disordered phases. The ab initio molecular dynamics (AIMD) results indicated that the energy of the intralayer disordered structure fluctuates around the equilibrium position without any abrupt drops, demonstrating excellent stability. This study enhances the understanding of intralayer disordered full‐Mn Li‐rich material and provides insights into the design of low‐cost, high‐performance cathode materials for Li‐ion batteries.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Elucidating the Role of Intralayer Cation Ordering and Disordering in Li <sub>0.6</sub> [Li <sub>0.2</sub> Mn <sub>0.8</sub> ]O <sub>2</sub> Cathode Materials
- Date Crossref
- 06/08/2025
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Ministry of Education Rwanda (code pays fourni par la source)Organisme public
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China Institute of Atomic Energy pays non établi dans la noticeStructure de recherche
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Peking University Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials pays non établi dans la noticeUniversité ou école supérieure
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Shanxi Center of Technology Innovation for Advanced Power Battery Material Shanxi Normal University Taiyuan China Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education) pays non établi dans la noticeUniversité ou école supérieure
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Neutron Scattering Laboratory pays non établi dans la noticeStructure de recherche
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School of Materials Science and Engineering Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials pays non établi dans la noticeUniversité ou école supérieure
Ministry of Education (Rwanda), China Institute of Atomic Energy et Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials — Peking University, avec 3 autres affiliations. Pays d’affiliation : Rwanda.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.