3D Co-Doping α-Ni(OH)2 Nanosheets for Ultrastable, High-Rate Ni-Zn Battery
© 2022 Wiley-VCH GmbH..
The α-Ni(OH)2 is regarded as one promising cathode for aqueous nickel-zinc batteries due to its high theoretical capacity of ≈480 mAh g-1 , its practical deployment however suffers from the poor stability in strong alkaline solution, intrinsic low electrical conductivity as well as the retarded ionic diffusion. Herein, a 3D (three dimensional) macroporous α-Ni(OH)2 nanosheets with Co doping is designed through a facile and easily scalable electroless plating combined with electrodeposition strategy. The unique micrometer-sized 3D pores come from Ni substrate and rich voids between Co-doping α-Ni(OH)2 nanosheets can synergistically afford facile, interconnected ionic diffusion channels, sufficient free space for accommodating its volume changes during cycling; meanwhile, the Co-doping can stabilize the structural robustness of the α-Ni(OH)2 in the alkaline electrolyte during cycling. Thus, the 3D α-Ni(OH)2 shows a high capacity of 284 mAh g-1 at 0.5 mA cm-2 with an excellent retention of 78% even at 15 mA cm-2 , and more than 2000 stable cycles at 6 mA cm-2 , as well as the robust cycling upon various flexible batteries. This work provides a simple and efficient pathway to enhance the electrochemical performance of Ni-Zn batteries through improving ionic transport kinetics and stabilizing crystal structure of cathodes.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:19 |
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| Enthalten in: |
Small (Weinheim an der Bergstrasse, Germany) - 19(2023), 8 vom: 16. Feb., Seite e2206287 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Wang, Kaixin [VerfasserIn] |
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| Links: |
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| Themen: |
α-Ni(OH)2 |
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| Anmerkungen: |
Date Completed 23.02.2023 Date Revised 23.02.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/smll.202206287 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a © 2022 Wiley-VCH GmbH. | ||
| 520 | |a The α-Ni(OH)2 is regarded as one promising cathode for aqueous nickel-zinc batteries due to its high theoretical capacity of ≈480 mAh g-1 , its practical deployment however suffers from the poor stability in strong alkaline solution, intrinsic low electrical conductivity as well as the retarded ionic diffusion. Herein, a 3D (three dimensional) macroporous α-Ni(OH)2 nanosheets with Co doping is designed through a facile and easily scalable electroless plating combined with electrodeposition strategy. The unique micrometer-sized 3D pores come from Ni substrate and rich voids between Co-doping α-Ni(OH)2 nanosheets can synergistically afford facile, interconnected ionic diffusion channels, sufficient free space for accommodating its volume changes during cycling; meanwhile, the Co-doping can stabilize the structural robustness of the α-Ni(OH)2 in the alkaline electrolyte during cycling. Thus, the 3D α-Ni(OH)2 shows a high capacity of 284 mAh g-1 at 0.5 mA cm-2 with an excellent retention of 78% even at 15 mA cm-2 , and more than 2000 stable cycles at 6 mA cm-2 , as well as the robust cycling upon various flexible batteries. This work provides a simple and efficient pathway to enhance the electrochemical performance of Ni-Zn batteries through improving ionic transport kinetics and stabilizing crystal structure of cathodes | ||
| 650 | 4 | |a Journal Article | |
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| 650 | 4 | |a Ni-Zn batteries | |
| 650 | 4 | |a cathodes | |
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| 700 | 1 | |a Fan, Xiaoyong |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Shengjie |e verfasserin |4 aut | |
| 700 | 1 | |a Deng, Junkai |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Lulu |e verfasserin |4 aut | |
| 700 | 1 | |a Jing, Maosen |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Julong |e verfasserin |4 aut | |
| 700 | 1 | |a Gou, Lei |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Donglin |e verfasserin |4 aut | |
| 700 | 1 | |a Ma, Yue |e verfasserin |4 aut | |
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