Nanoporous Cu/Co alloy based Cu2O/CoO nanoneedle arrays hybrid as a binder-free electrode for supercapacitors
| Autor: | Jiqiu Qi, Q. K. Meng, Y.Z. He, Y. W. Sui, Fuxiang Wei, R. Wang, Zhi Sun |
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| Rok vydání: | 2017 |
| Předmět: |
Supercapacitor
Materials science Nanoporous Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Capacitance Atomic and Molecular Physics and Optics Energy storage 0104 chemical sciences Electronic Optical and Magnetic Materials Chemical engineering Electrode Electrical and Electronic Engineering 0210 nano-technology Nanoneedle Power density |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 28:8755-8763 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-017-6601-7 |
| Popis: | In this paper, Cu2O/CoO nanoneedle arrays (Cu2O/CoO-NNAs) are vertically grown on nanoporous Cu/Co (NPs-Co/Cu) conductive substrate through a facile dealloying and oxidation method. Benefiting from their intriguing structural features, the NPs-Cu/Co alloy based Cu2O/CoO-NNAs hybrid possesses fascinating electrochemical performance as an integrated binder-free electrode for symmetric supercapacitors (SSCs). High areal capacitances of 0.21 F cm−2 can be achieved at a current densities of 5 mA cm−2. Moreover, electrode has an excellent long-term cycling stability with 100% capacitance retention after 10000 cycles. A maximum of volumetric energy density (0.81 mW h cm−3) and volumetric power density (3 W cm−3) were achieved for the as-fabricated SSCs device. Therefore, the present work holds a great promise for future design and large-scale production of high volumetric energy density and volumetric energy density electrodes by dealloying and oxidation method for energy storage devices. |
| Databáze: | OpenAIRE |
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