Synthesis of Needle-like CoO Nanowires Decorated with Electrospun Carbon Nanofibers for High-Performance Flexible Supercapacitors
Needle-like CoO nanowires have been successfully synthesized by a facile hydrothermal process on an electrospun carbon nanofibers substrate. The as-prepared sample mesoporous CoO nanowires aligned vertically on the surface of carbon nanofibers and cross-linked with each other, producing loosely poro...
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
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| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/14/21/1770 |
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| Summary: | Needle-like CoO nanowires have been successfully synthesized by a facile hydrothermal process on an electrospun carbon nanofibers substrate. The as-prepared sample mesoporous CoO nanowires aligned vertically on the surface of carbon nanofibers and cross-linked with each other, producing loosely porous nanostructures. These hybrid composite electrodes exhibit a high specific capacitance of 1068.3 F g<sup>−1</sup> at a scan rate of 5 mV s<sup>−1</sup> and a good rate capability of 613.7 F g<sup>−1</sup> at a scan rate of 60 mV s<sup>−1</sup> in a three-electrode cell. The CoO NWs@CNF//CNT@CNF asymmetric device exhibits remarkable cycling stability and delivers a capacitance of 79.3 F/g with a capacitance retention of 92.1 % after 10,000 cycles. The asymmetric device delivers a high energy density of 37 Wh kg<sup>−1</sup> with a power density of 0.8 kW kg<sup>−1</sup> and a high power density of 16 kW kg<sup>−1</sup> with an energy density of 23 Wh kg<sup>−1</sup>. This study demonstrated a promising strategy to enhance the electrochemical performance of flexible supercapacitors. |
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| ISSN: | 2079-4991 |