期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 556, 期 -, 页码 386-391出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.08.078
关键词
Supercapacitor; NiCo2O4; NiO; Rate performance; Cycling stability
资金
- National Natural Science Foundation of China [51602049, 51602193]
- China Postdoctoral Science Foundation [2017M610217, 2018T110322]
- Shanghai Chen Guang project [16CG63]
- Fundamental Research Funds for the Central Universities [WD1817002]
- Talent Program of Shanghai University of Engineering Science
The design of multicomponent electrode materials is attractive for advanced supercapacitors due to synergistic and multifunctional effects among different active materials. We reported here a structure-designed synthesis strategy to controllably fabricate hierarchical NiCo2O4@NiO composites on carbon fiber paper. The hierarchical structure with NiCo2O4 core and NiO shell provided more active sites for ion transportation and storage to improve utilization rate of electrode materials, enhancing the specific capacitance and rate performance. As an ideal electrode material for supercapacitors, the NiCo2O4@NiO electrode exhibit high specific capacitance (1188 F/g at 2 A/g), excellent rate capability with 85% capacitance retained at 10 A/g, and compelling cycling performance (similar to 106.8% of the initial capacitance retention over 7000 cycles). The present work demonstrated a structure-designed strategy to construct high-performance multicomponent electrode materials for supercapacitors. (C) 2019 Elsevier Inc. All rights reserved.
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