Hydrothermally formed three-dimensional hexagon-like P doped Ni(OH)2 rod arrays for high performance all-solid-state asymmetric supercapacitors
| Autor: | Kunzhen Li, Lei Wang, Hui Zhang, Fangzhi Huang, Yan Lu, Shikuo Li, Hong Chen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Supercapacitor
Aqueous solution Materials science Doping Analytical chemistry General Physics and Astronomy Nanotechnology 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Capacitance Hydrothermal circulation 0104 chemical sciences Surfaces Coatings and Films Electrode medicine 0210 nano-technology Power density Activated carbon medicine.drug |
| Zdroj: | Applied Surface Science. 428:250-257 |
| ISSN: | 0169-4332 |
| Popis: | Three dimensional hexagon-like phosphrous (P) doped Ni(OH)2 rod arrays grown on Ni foam (NF) are fabricated by a facile and green one-step hydrothermal process. Ni foam is only reacted in a certain concentration of P containing H2O2 aqueous solution. The possible growth mechanism of the P doped Ni(OH)2 rod arrays is discussed. As a battery-type electrode material in situ formed on Ni foam, the binder-free P doped Ni(OH)2 rod arrays electrode displays a ultrahigh specific areal capacitance of 2.11C cm−2 (3.51 F cm−2) at 2 mA cm−2, and excellent cycling stability (95.5% capacitance retention after 7500 cycles). The assembled all-solid-state asymmetric supercapacitor (AAS) based on such P doped Ni(OH)2 rod arrays as the positive electrode and activated carbon as the negative electrode achieves an energy density of 81.3 Wh kg−1 at the power density of 635 W kg−1. The AAS device also exhibits excellent practical performance, which can easily drive an electric fan (3 W rated power) when two AAS devices are assembled in series. Thus, our synthesized P doped Ni(OH)2 rod arrays has a lot of potential applications in future energy storage prospects. |
| Databáze: | OpenAIRE |
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