Role of Substitution Elements in Enhancing the Structural Stability of Li-Rich Layered Cathodes
Element doping/substitution has been recognized as an effective strategy to enhance the structural stability of layered cathodes. However, abundant substitution studies not only lack a clear identification of the substitution sites in the material lattice, but the rigid interpretation of the transition metal (TM)-O covalent theory is also not sufficiently convincing, resulting in the doping/substitution proposals being dragged into design blindness. In this work, taking Li1.2Ni0.2Mn0.6O2 as a prototype, the intense correlation between the "disordered degree" (Li/Ni mixing) and interface-structure stability (e.g., TM-O environment, slab/lattice, and Li+ reversibility) is revealed. Specifically, the degree of disorder induced by the Mg/Ti substitution extends in the opposite direction, conducive to sharp differences in the stability of TM-O, Li+ diffusion, and anion redox reversibility, delivering fairly distinct electrochemical performance. Based on the established paradigm of systematic characterization/analysis, the "degree of disorder" has been shown to be a powerful indicator of material modification by element substitution/doping.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - year:2023 |
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| Enthalten in: |
Journal of the American Chemical Society - (2023) vom: 07. Apr. |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Baodan [VerfasserIn] |
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Date Revised 08.04.2023 published: Print-Electronic Citation Status Publisher |
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| doi: |
10.1021/jacs.3c01999 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM355339889 |
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| 520 | |a Element doping/substitution has been recognized as an effective strategy to enhance the structural stability of layered cathodes. However, abundant substitution studies not only lack a clear identification of the substitution sites in the material lattice, but the rigid interpretation of the transition metal (TM)-O covalent theory is also not sufficiently convincing, resulting in the doping/substitution proposals being dragged into design blindness. In this work, taking Li1.2Ni0.2Mn0.6O2 as a prototype, the intense correlation between the "disordered degree" (Li/Ni mixing) and interface-structure stability (e.g., TM-O environment, slab/lattice, and Li+ reversibility) is revealed. Specifically, the degree of disorder induced by the Mg/Ti substitution extends in the opposite direction, conducive to sharp differences in the stability of TM-O, Li+ diffusion, and anion redox reversibility, delivering fairly distinct electrochemical performance. Based on the established paradigm of systematic characterization/analysis, the "degree of disorder" has been shown to be a powerful indicator of material modification by element substitution/doping | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Zhang, Yiming |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Xiaotong |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Hui |e verfasserin |4 aut | |
| 700 | 1 | |a Yan, Yawen |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Shiyuan |e verfasserin |4 aut | |
| 700 | 1 | |a Tang, Yonglin |e verfasserin |4 aut | |
| 700 | 1 | |a Zeng, Guifan |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Xiaohong |e verfasserin |4 aut | |
| 700 | 1 | |a Liao, Hong-Gang |e verfasserin |4 aut | |
| 700 | 1 | |a Qiu, Yongfu |e verfasserin |4 aut | |
| 700 | 1 | |a Huang, Huan |e verfasserin |4 aut | |
| 700 | 1 | |a Zheng, Lirong |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Juping |e verfasserin |4 aut | |
| 700 | 1 | |a Yin, Wen |e verfasserin |4 aut | |
| 700 | 1 | |a Huang, Zhongyuan |e verfasserin |4 aut | |
| 700 | 1 | |a Xiao, Yinguo |e verfasserin |4 aut | |
| 700 | 1 | |a Xie, Qingshui |e verfasserin |4 aut | |
| 700 | 1 | |a Peng, Dong-Liang |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Chao |e verfasserin |4 aut | |
| 700 | 1 | |a Qiao, Yu |e verfasserin |4 aut | |
| 700 | 1 | |a Sun, Shi-Gang |e verfasserin |4 aut | |
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