Optimizing electrochemical performance of Na0.67Ni0.17Co0.17Mn0.66O2 with P2 structure via preparing concentration-gradient particles for sodium-ion batteries
Copyright © 2024 Elsevier Inc. All rights reserved..
P2-type layered oxides for rechargeable sodium-ion batteries have drawn a lot of attention because of their excellent electrochemical performance. However, these types of cathodes usually suffer from poor cyclic stability. To overcome this disadvantage, in this work, novel ball-shaped concentration-gradient oxide Na0.67Ni0.17Co0.17Mn0.66O2 with P2 structure modified by Mn-rich surface is successfully prepared using co-precipitation method. The concentration of Mn increased from the inner core to the surface, endowing the material with an excellent cyclic stability. The cathode exhibits enhanced electrochemical properties than that of the sample synthesized by solid-state method and concentration-constant material. It shows 143.2 mAh/g initial discharge capacity and retains 131 mAh/g between 2 V and 4.5 V after 100 rounds. The significant improvement in the electrochemical properties of the sample benefits from the unique concentration-gradient structure, and the Mn-rich surface that effectively stabilizes the basic P2 structure. The relatively higher Ni content in the core leads to a slight improvement in the discharge capacity of the sample. This strategy may provide new insights for preparing layered cathodes for sodium-ion batteries with high electrochemical performance.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:662 |
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| Enthalten in: |
Journal of colloid and interface science - 662(2024) vom: 15. März, Seite 69-75 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Duan, Yu [VerfasserIn] |
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| Links: |
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| Themen: |
Concentration-gradient structure |
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| Anmerkungen: |
Date Revised 12.03.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1016/j.jcis.2024.02.046 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM368252310 |
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| 500 | |a Date Revised 12.03.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Copyright © 2024 Elsevier Inc. All rights reserved. | ||
| 520 | |a P2-type layered oxides for rechargeable sodium-ion batteries have drawn a lot of attention because of their excellent electrochemical performance. However, these types of cathodes usually suffer from poor cyclic stability. To overcome this disadvantage, in this work, novel ball-shaped concentration-gradient oxide Na0.67Ni0.17Co0.17Mn0.66O2 with P2 structure modified by Mn-rich surface is successfully prepared using co-precipitation method. The concentration of Mn increased from the inner core to the surface, endowing the material with an excellent cyclic stability. The cathode exhibits enhanced electrochemical properties than that of the sample synthesized by solid-state method and concentration-constant material. It shows 143.2 mAh/g initial discharge capacity and retains 131 mAh/g between 2 V and 4.5 V after 100 rounds. The significant improvement in the electrochemical properties of the sample benefits from the unique concentration-gradient structure, and the Mn-rich surface that effectively stabilizes the basic P2 structure. The relatively higher Ni content in the core leads to a slight improvement in the discharge capacity of the sample. This strategy may provide new insights for preparing layered cathodes for sodium-ion batteries with high electrochemical performance | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Concentration-gradient structure | |
| 650 | 4 | |a Layered oxide | |
| 650 | 4 | |a Mn-rich surface | |
| 650 | 4 | |a Sodium-ion batteries | |
| 700 | 1 | |a Ma, Zi-Han |e verfasserin |4 aut | |
| 700 | 1 | |a Wan, Qing-Xin |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Min-Min |e verfasserin |4 aut | |
| 700 | 1 | |a Huang, Ying-Ying |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Li-Li |e verfasserin |4 aut | |
| 700 | 1 | |a Han, Xiao-Heng |e verfasserin |4 aut | |
| 700 | 1 | |a Bao, Shuo |e verfasserin |4 aut | |
| 700 | 1 | |a Lu, Jin-Lin |e verfasserin |4 aut | |
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