Inducing Na+ Site Rearrangement Through a Cosubstitution Strategy for Rapid Na Diffusion Kinetics of P2-Type Layered Metal Oxides
The P2-layered metal oxide cathode materials are crucial for constructing high-rate sodium-ion batteries (SIBs); however, its practical application is hindered by the high Na+ diffusion barrier resulting from Na+/vacancy ordering. Herein, a Li/Zn cosubstitution P2-Na0.67Ni0.33Mn0.67O2 (NLNZM) cathode was synthesized via a sol-gel method assisted with citric acid, which can induce the rearrangement of Na+ sites to disrupt ordered structures. The XRD Rietveld refinement confirms a higher occupancy of Na+ at Nae sites with low diffusion barriers through the Li/Zn cosubstitution. In addition, the highly reversible phase evolution of the NLNZM is confirmed through in situ XRD results, thereby ensuring the stability of the structure with low volume change rate (0.78%). Furthermore, Li and Zn can reduce the surface energy and increase the interlayered distance to achieve rapid interfacial kinetics. As a result, the NLNZM has exhibited a high reversible capacity of 152.8 mAh g-1 and an outstanding rate performance of 103.4 mAh g-1 at 5C. After 200 cycles at 5C, the capacity retention rate is 81.1%. This work proposes a cosubstitution strategy to induce Na+/vacancy disorder for achieving rapid Na+ migration as a cathode material for SIBs.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:16 |
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| Enthalten in: |
ACS applied materials & interfaces - 16(2024), 12 vom: 27. März, Seite 14789-14798 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Gao, Mingyang [VerfasserIn] |
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| Links: |
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| Themen: |
High-rate performance |
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| Anmerkungen: |
Date Revised 28.03.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1021/acsami.3c18341 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM369725085 |
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| 520 | |a The P2-layered metal oxide cathode materials are crucial for constructing high-rate sodium-ion batteries (SIBs); however, its practical application is hindered by the high Na+ diffusion barrier resulting from Na+/vacancy ordering. Herein, a Li/Zn cosubstitution P2-Na0.67Ni0.33Mn0.67O2 (NLNZM) cathode was synthesized via a sol-gel method assisted with citric acid, which can induce the rearrangement of Na+ sites to disrupt ordered structures. The XRD Rietveld refinement confirms a higher occupancy of Na+ at Nae sites with low diffusion barriers through the Li/Zn cosubstitution. In addition, the highly reversible phase evolution of the NLNZM is confirmed through in situ XRD results, thereby ensuring the stability of the structure with low volume change rate (0.78%). Furthermore, Li and Zn can reduce the surface energy and increase the interlayered distance to achieve rapid interfacial kinetics. As a result, the NLNZM has exhibited a high reversible capacity of 152.8 mAh g-1 and an outstanding rate performance of 103.4 mAh g-1 at 5C. After 200 cycles at 5C, the capacity retention rate is 81.1%. This work proposes a cosubstitution strategy to induce Na+/vacancy disorder for achieving rapid Na+ migration as a cathode material for SIBs | ||
| 650 | 4 | |a Journal Article | |
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| 650 | 4 | |a Na sites rearrangement | |
| 650 | 4 | |a P2-layered oxides | |
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| 700 | 1 | |a Wang, Xiaomin |e verfasserin |4 aut | |
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