期刊
NANOSCALE
卷 6, 期 8, 页码 4303-4308出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr06564b
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资金
- Jiangsu Provincial Funds for Distinguished Young Scholars [BK20130046]
- National Basic Research Program of China [2012CB933300]
- NNSF of China [21275076, 61328401]
- Chinese Ministry of Education [2012058]
- Program for New Century Excellent Talents in University [NCET-13-0853]
- Research Fund for the Doctoral Program of Higher Education of China [20123223110008]
Hierarchical mesoporous spinel NiCo2O4 was synthesized by a facile hydrothermal method assisted by polyvinylpyrrolidone (PVP) and a post annealing treatment. The synthesized hierarchical mesoporous NiCo2O4 presents a hierarchical mesoporous structure with diameters of 5.0 and 25 nm, respectively. Compared to conventional flower-like NiCo2O4, the hierarchical mesoporous structured NiCo2O4 exhibits excellent supercapacitor performance. The specific capacitance can reach 1619.1 F g(-1) at a current density of 2.0 A g(-1). When the current density is increased to 10.0 A g(-1), a specific capacitance of 571.4 F g(-1) can be obtained. Furthermore, the hierarchical mesoporous structured NiCo2O4 presents excellent stability. The outstanding electrochemical performance of the hierarchical mesoporous NiCo2O4 reveals its potential to be a promising material for use in supercapacitors, and also inspires continued research on binary metal oxides as energy transformation materials.
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