4.7 Article

Synthesis of hierarchical Co3O4@NiCo2O4 core-shell nanosheets as electrode materials for supercapacitor application

Journal

JOURNAL OF ALLOYS AND COMPOUNDS
Volume 700, Issue -, Pages 247-251

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.01.071

Keywords

Supercapacitor; Hierarchical; Co3O4@NiCo2O4; Core-shell

Funding

  1. National Natural Science Foundation of China [51602049, 21171035, 51472049, 51302035]
  2. Fundamental Research Funds for the Central Universities

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Construction of core-shell heterostructures with multifunctionalities has been regarded as promising materials to improve the supercapacitor performances for single metal oxide. In our work, hierarchical Co3O4@NiCo2O4 core-shell nanosheets are successfully fabricated on Ni foam for supercapacitors. The Co3O4@NiCo2O4 electrode demonstrates excellent supercapacitor performances with the areal capacitance of 1.33 F/cm2 at 3 mA/cm2, the specific capacitance of 1330 F/g at 3 mA/cm(2) and superior cycling stability of similar to 100.7% after 5000 cycles. The excellent electrochemical properties for the Co3O4@NiCo2O4 hybrid composites can be ascribed to the unique core-shell nanostructures as well as the synergistic effect of Co3O4 and NiCo2O4. The as-prepared Co3O4@NiCo2O4 hybrid composites with enhanced performances could be considered as a promising electrode material for high-performance supercapacitors. (C) 2017 Elsevier B.V. All rights reserved.

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