Mesoporous NiCoP microflowers as a superior electrode material for supercapacitors
| Autor: | Qianlei Jiang, Chenchen Zhao, Yuhong Jin, Changwei Ji |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Supercapacitor
Electrode material Materials science General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry Synergistic combination 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences Surfaces Coatings and Films Metal Chemical engineering visual_art Electrode visual_art.visual_art_medium 0210 nano-technology Mesoporous material |
| Zdroj: | Applied Surface Science. 450:170-179 |
| ISSN: | 0169-4332 |
| Popis: | In this study, mesoporous NiCoP microflowers are fabricated by a simple direct low-temperature phosphorization of the hydrothermal-prepared Ni0.5Co0.5(OH)2 microflower precursors. The resultant NiCoP material possesses a unique three-dimensional flower-like architecture with high specifc surface area (56.6 m2 g−1) and large pore volume (0.432 cm3 g−1). Utilized as the supercapacitor electrodes, mesoporous NiCoP microflowers outperform the monometallic phosphides (CoxP and Ni2P microflowers) with excellent charge-discharge rate properties (e.g., specific capacity of 1153 and 715 F g−1 at 1 and 30 A g−1, respectively) and superior cycling performance. The specific capacitance of 883 F g−1 can remain stable at 20 A g−1 after 7000 cycles. More importantly, as-prepared NiCoP microflower electrode is able to deliver high energy densities of 48.4 Wh kg−1 and 30 Wh kg−1 at the power densities of 275 W kg−1 and 8.2 kW kg−1, respectively. The enhanced pseudocapacitive performance is mainly attributed to the mesoporous microflower structure and the synergistic combination of different metal elements (Ni and Co) for electrochemical reactions. |
| Databáze: | OpenAIRE |
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