期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 793, 期 -, 页码 418-424出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.04.189
关键词
Hydrothermal synthesis; Supercapacitor; Hierarchical structure; NiCo2O4; CoMoO4
资金
- National Natural Science Foundation of China [21671147]
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry [2018-22]
- State Key Laboratory of Coal and CBM Co-mining [2016012004]
Highly regular three-dimensional (3D) NiCo2O4/CoMoO4 hierarchical nanosheets (NSs) were prepared through a simple hydrothermal process. During the hydrothermal process, ethylamine solution is crucial for the morphology of NiCo2O4/CoMoO4 NSs and self-assembled formation of CoMoO4 with porous architecture on NiCo2O4. Such curly porous hierarchical structure with large surface areas is benefit to provide numerous accessible electrochemically active sites for faradaic redox reactions. In addition, the morphologies and the mass loading adjustment of NiCo2O4/CoMoO4 NSs can be easily achieved by controlling growth time. The as-prepared NiCo2O4/CoMoO4 electrode demonstrates superior specific capacitance (1730 F/g at 1 A/g), satisfied rate capability (60%, at 20 A/g), and excellent cycling stability (76.2% capacitance retention at 10 A/g). These good electrochemical performances exhibit that the as-obtained NiCo2O4/CoMoO4 composites are efficient electrode materials for pseudo-capacitors and may provide a useful guidance for obtaining electrode materials with outstanding electrochemical performance. (C) 2019 Elsevier B.V. All rights reserved.
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