| Autor: |
Wang, Liyan, Liu, Meijia, Liu, Jia, Chen, Liying, Xiao, Shanshan, Bi, Fei, Zhao, Li, Li, Yingqi |
| Zdroj: |
Journal of Materials Science: Materials in Electronics; Jul2024, Vol. 35 Issue 21, p1-13, 13p |
| Abstrakt: |
The NiCo2O4 nanosheets arrays with oxygen vacancies on Ni foam (NiCo2O4/NF) hybrid electrode is made utilizing high-pressure hydrothermal synthesis and subsequent heat treatment. Benefitting from the joint contribution of the greater specific surface area, sufficient oxygen vacancies, and unique nanosheet array structure, the NiCo2O4/NF electrode exhibits an enhanced electrochemical properties, such as a high specific capacitance of 1452.6 F/g at 1 A/g and prominent cycle stability with a capacitance retention of 98.67% after 4000 cycles. Moreover, the capacitance remains at 591 F/g at 50 A/g, demonstrating better rate capability. In addition, an asymmetric supercapacitor (ASC) was assembled based on NiCo2O4/NF//activated carbon (AC). Such an ASC delivers a high energy density of 47.95 Wh/kg at the power density of 750 W/kg and retains Wh/kg at W/kg. The ASC exhibits a preeminent cycling stability with a specific capacitance retention rate of 98.68% of initial capacitance after 25,000 cycles under 80 A/g. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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