Co3O4@NiCo2O4 microsphere as electrode materials for high-performance supercapacitors.
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| Title: | Co3O4@NiCo2O4 microsphere as electrode materials for high-performance supercapacitors. |
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| Authors: | Zhu, Yan-Rong1 (AUTHOR), Peng, Pan-Pan1 (AUTHOR), Wu, Jin-Zhu1 (AUTHOR), Yi, Ting-Feng1 (AUTHOR) tfyihit@163.com, Xie, Ying1 (AUTHOR) xieying@hlju.edu.cn, Luo, Shaohua1 (AUTHOR) tianyanglsh@163.com |
| Source: | Solid State Ionics. Aug2019, Vol. 336, p110-119. 10p. |
| Subjects: | Supercapacitor electrodes, Charge exchange, Charge transfer, Electrodes, Microspheres, Materials |
| Abstract: | In this work, hierarchical Co 3 O 4 @NiCo 2 O 4 microspheres composed of nano particles grown on nickel foam as supercapacitor electrode material were designed by a hydrothermal route, following an ultrasonic-assisted process. The introduction of moderate amounts NiCo 2 O 4 in Co 3 O 4 can decrease charge transfer resistance and enhance the transfer of electrons and ions. Therefore, Co 3 O 4 @NiCo 2 O 4 (4:1) shows an excellent specific capacitance of 879.4 F g−1 at 10 A g−1, and the capacitance retention maintains 81.2% of its first capacitance after 3000 cycles, indicating a high cycling durability and outstanding fast charge-discharge performance. The outstanding property exhibits that the hierarchical Co 3 O 4 @NiCo 2 O 4 (4:1) microsphere has tremendous application potential in supercapacitors. Unlabelled Image • Hierarchical Co 3 O 4 @NiCo 2 O 4 microspheres grown on nickel foam are designed. • The well-matched interfaces are helpful for improving the rate capacity and cycling stability. • Hierarchical Co 3 O 4 @NiCo 2 O 4 microsphere has tremendous application potential. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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