Self-Supported Sheets-on-Wire CuO@Ni(OH)2/Zn(OH)2 Nanoarrays for High-Performance Flexible Quasi-Solid-State Supercapacitor
| Autor: | Jianyang Jiang, Xiong Xiong Liu, Jiayu Han, Ke Hu, Jun Song Chen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Nanowire Bioengineering 02 engineering and technology lcsh:Chemical technology 010402 general chemistry 01 natural sciences Energy storage lcsh:Chemistry Transition metal self-supported nanoarray Chemical Engineering (miscellaneous) lcsh:TP1-1185 Supercapacitor Process Chemistry and Technology flexible quasi-solid-state supercapacitor Current collector 021001 nanoscience & nanotechnology 0104 chemical sciences sheets-on-wire lcsh:QD1-999 Chemical engineering Electrode 0210 nano-technology Quasi-solid Current density high capacity |
| Zdroj: | Processes Volume 9 Issue 4 Processes, Vol 9, Iss 680, p 680 (2021) |
| ISSN: | 2227-9717 |
| DOI: | 10.3390/pr9040680 |
| Popis: | Transition metal hydroxides have attracted a lot of attention as the electrode materials for supercapacitors owing to their relatively high theoretical capacity, low cost, and facile preparation methods. However, their low intrinsic conductivity deteriorates their high-rate performance and cycling stability. Here, self-supported sheets-on-wire CuO@Ni(OH)2/Zn(OH)2 (CuO@NiZn) composite nanowire arrays were successfully grown on copper foam. The CuO nanowire backbone provided enhanced structural stability and a highly efficient electron-conducting pathway from the active hydroxide nanosheets to the current collector. The resulting CuO@NiZn as the battery-type electrode for supercapacitor application delivered a high capacity of 306.2 mAh g−1 at a current density of 0.8 A g−1 and a very stable capacity of 195.1 mAh g−1 at 4 A g−1 for 10,000 charge–discharge cycles. Furthermore, a quasi-solid-state hybrid supercapacitor (qss HSC) was assembled with active carbon, exhibiting 125.3 mAh g−1 at 0.8 A g−1 and a capacity of 41.6 mAh g−1 at 4 A g−1 for 5000 charge–discharge cycles. Furthermore, the qss HSC was able to deliver a high energy density of about 116.0 Wh kg−1. Even at the highest power density of 7.8 kW kg−1, an energy density of 20.5 Wh kg−1 could still be obtained. Finally, 14 red light-emitting diodes were lit up by a single qss HSC at different bending states, showing good potential for flexible energy storage applications. |
| Databáze: | OpenAIRE |
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