Journal
ENERGY STORAGE MATERIALS
Volume 2, Issue -, Pages 1-7Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2015.11.001
Keywords
Nanostructure; One-step synthesis; Nickel cobalt sulfide; Supercapacitor; Electrode material
Funding
- Natural Science Foundation of China [51402236, 53102219, 51472204, 51221001]
- Natural Science Foundation of Shannxi Province [2015JM5180]
- Fundamental Research Funds for the Central Universities [3102014JCQ01020]
- Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China [123-QZ-2015]
- Program of Introducing Talents of Discipline to Universities [B08040]
- US National Science Foundation [1067960]
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A rational synthesis strategy is developed to fabricate hierarchical NiCo2S4 nanostructures with controllable mass loadings on Ni foams. The three-dimensional nanoarchitecture ensures good mechanical and electrical connections to increase the ion diffusion and charge transport rate as well as the robust stiffness of the electrode. When used as electrodes for supercapacitors, the novel electrode exhibits outstanding energy storage performance. The specific capacitance is closely associated with the mass loading of the NiCo2S4 nanostructures, which manifest 1739 F g(-1) at 1 A g(-1) along with a maximum areal capacitance of 4.0 F cm(-2), high-rate retention of 85.2% at 30 A g(-1) and good cycling stability at an optimal mass loading of 2.3 mg cm(-2). The electrochemical results demonstrate that our NiCo2S4 nanostructures are promising electrode materials for high-performance supercapacitor applications. (C) 2015 Elsevier B.V. All rights reserved.
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