Engineering NiCoP arrays by cross-linked nanowires and nanosheets as advanced materials for hybrid supercapacitors
| Autor: | PeiPei Li, Haifu Huang, Faxin Yan, Liqing Yan, Wenzheng Zhou, Yu Han |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Supercapacitor
Materials science Renewable Energy Sustainability and the Environment Graphene 020209 energy Nanowire Energy Engineering and Power Technology Heterojunction 02 engineering and technology 021001 nanoscience & nanotechnology Electrochemistry Capacitance law.invention Chemical engineering law Electrode 0202 electrical engineering electronic engineering information engineering Specific energy Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Journal of Energy Storage. 38:102503 |
| ISSN: | 2352-152X |
| DOI: | 10.1016/j.est.2021.102503 |
| Popis: | In this work, the NiCoP nanoarrays were synthesized on Ni foam through the hydrothermal method and phosphating process. As an electrode material of supercapacitor, NiCoP/NF nanoarrays show excellent performance with a high specific capacitance of 2564 F g−1 at 2 A g−1, unexpected charge-discharge rate performance, and slow self-discharge behavior, which are superior to those of single metal phosphides (CoP/NF and NiP/NF). More importantly, the hybrid supercapacitor NiCoP/NF//graphene possesses a specific energy of 22.8 Wh kg−1 and good cycle stability that the capacitance remains 68.33% of the initial specific capacitance after 4000 cycles. The improvement in electrochemical performance mostly stems from the three-dimensional heterostructure, the positive synergistic combination of Ni and Co metal elements in the electrochemical process, and the high conductivity of phosphides. Therefore, this work demonstrates the potential of NiCoP/NF electrodes in supercapacitor energy storage. |
| Databáze: | OpenAIRE |
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