Concave Ni(OH)<sub>2</sub> Nanocube Synthesis and Its Application in High-Performance Hybrid Capacitors
The controlled synthesis of hollow structure transition metal compounds has long been a very interesting and significant research topic in the energy storage and conversion fields. Herein, an ultrasound-assisted chemical etching strategy is proposed for fabricating concave Ni(OH)<sub>2</sub...
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MDPI AG
2023-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/18/2538 |
| _version_ | 1827724951240572928 |
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| author | Nan Cong Pan Li Xuyun Guo Xiaojuan Chen |
| author_facet | Nan Cong Pan Li Xuyun Guo Xiaojuan Chen |
| author_sort | Nan Cong |
| collection | DOAJ |
| description | The controlled synthesis of hollow structure transition metal compounds has long been a very interesting and significant research topic in the energy storage and conversion fields. Herein, an ultrasound-assisted chemical etching strategy is proposed for fabricating concave Ni(OH)<sub>2</sub> nanocubes. The morphology and composition evolution of the concave Ni(OH)<sub>2</sub> nanocubes suggest a possible formation mechanism. The as-synthesized Ni(OH)<sub>2</sub> nanostructures used as supercapacitor electrode materials exhibit high specific capacitance (1624 F g<sup>−1</sup> at 2 A g<sup>−1</sup>) and excellent cycling stability (77% retention after 4000 cycles) due to their large specific surface area and open pathway. In addition, the corresponding hybrid capacitor (Ni(OH)<sub>2</sub>//graphene) demonstrates high energy density (42.9 Wh kg<sup>−1</sup> at a power density of 800 W kg<sup>−1</sup>) and long cycle life (78% retention after 4000 cycles at 5 A g<sup>−1</sup>). This work offers a simple and economic approach for obtaining concave Ni(OH)<sub>2</sub> nanocubes for energy storage and conversion. |
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| format | Article |
| id | doaj.art-d9edfc7b295848dcb49f94569ef9d064 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T22:22:39Z |
| publishDate | 2023-09-01 |
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| series | Nanomaterials |
| spelling | doaj.art-d9edfc7b295848dcb49f94569ef9d0642023-11-19T12:14:22ZengMDPI AGNanomaterials2079-49912023-09-011318253810.3390/nano13182538Concave Ni(OH)<sub>2</sub> Nanocube Synthesis and Its Application in High-Performance Hybrid CapacitorsNan Cong0Pan Li1Xuyun Guo2Xiaojuan Chen3Beijing Academy of Quantum Information Sciences, Beijing 100193, ChinaInstitute of Analysis and Testing, Beijing Academy of Science and Technology, Beijing 100089, ChinaCentre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), School of Chemistry, Trinity College Dublin, D02PN40 Dublin, IrelandBeijing Academy of Quantum Information Sciences, Beijing 100193, ChinaThe controlled synthesis of hollow structure transition metal compounds has long been a very interesting and significant research topic in the energy storage and conversion fields. Herein, an ultrasound-assisted chemical etching strategy is proposed for fabricating concave Ni(OH)<sub>2</sub> nanocubes. The morphology and composition evolution of the concave Ni(OH)<sub>2</sub> nanocubes suggest a possible formation mechanism. The as-synthesized Ni(OH)<sub>2</sub> nanostructures used as supercapacitor electrode materials exhibit high specific capacitance (1624 F g<sup>−1</sup> at 2 A g<sup>−1</sup>) and excellent cycling stability (77% retention after 4000 cycles) due to their large specific surface area and open pathway. In addition, the corresponding hybrid capacitor (Ni(OH)<sub>2</sub>//graphene) demonstrates high energy density (42.9 Wh kg<sup>−1</sup> at a power density of 800 W kg<sup>−1</sup>) and long cycle life (78% retention after 4000 cycles at 5 A g<sup>−1</sup>). This work offers a simple and economic approach for obtaining concave Ni(OH)<sub>2</sub> nanocubes for energy storage and conversion.https://www.mdpi.com/2079-4991/13/18/2538Ni(OH)<sub>2</sub> nanocubechemical etchingPrussian blue analogshybrid capacitor |
| spellingShingle | Nan Cong Pan Li Xuyun Guo Xiaojuan Chen Concave Ni(OH)<sub>2</sub> Nanocube Synthesis and Its Application in High-Performance Hybrid Capacitors Nanomaterials Ni(OH)<sub>2</sub> nanocube chemical etching Prussian blue analogs hybrid capacitor |
| title | Concave Ni(OH)<sub>2</sub> Nanocube Synthesis and Its Application in High-Performance Hybrid Capacitors |
| title_full | Concave Ni(OH)<sub>2</sub> Nanocube Synthesis and Its Application in High-Performance Hybrid Capacitors |
| title_fullStr | Concave Ni(OH)<sub>2</sub> Nanocube Synthesis and Its Application in High-Performance Hybrid Capacitors |
| title_full_unstemmed | Concave Ni(OH)<sub>2</sub> Nanocube Synthesis and Its Application in High-Performance Hybrid Capacitors |
| title_short | Concave Ni(OH)<sub>2</sub> Nanocube Synthesis and Its Application in High-Performance Hybrid Capacitors |
| title_sort | concave ni oh sub 2 sub nanocube synthesis and its application in high performance hybrid capacitors |
| topic | Ni(OH)<sub>2</sub> nanocube chemical etching Prussian blue analogs hybrid capacitor |
| url | https://www.mdpi.com/2079-4991/13/18/2538 |
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