Synthesis and characterization of a NiCo2O4@NiCo2O4 hierarchical mesoporous nanoflake electrode for supercapacitor applications

Xin Chen, Hui Li, Jianzhou Xu, F. Jaber, F. Musharavati, Erfan Zalezhad, S. Bae, K. S. Hui, K. N. Hui, Junxing Liu

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38 Citations (Scopus)
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In this study, we synthesized binder-free NiCo2O4@NiCo2O4 nanostructured materials on nickel foam (NF) by combined hydrothermal and cyclic voltammetry deposition techniques followed by calcination at 350 °C to attain high-performance supercapacitors. The hierarchical porous NiCo2O4@NiCo2O4 structure, facilitating faster mass transport, exhibited good cycling stability of 83.6% after 5000 cycles and outstanding specific capacitance of 1398.73 F g−1 at the current density of 2 A·g−1, signifying its potential for energy storage applications. A solid-state supercapacitor was fabricated with the NiCo2O4@NiCo2O4 on NF as the positive electrode and the active carbon (AC) was deposited on NF as the negative electrode, delivering a high energy density of 46.46 Wh kg−1 at the power density of 269.77 W kg−1. This outstanding performance was attributed to its layered morphological characteristics. This study explored the potential application of cyclic voltammetry depositions in preparing binder-free NiCo2O4@NiCo2O4 materials with more uniform architecture for energy storage, in contrast to the traditional galvanostatic deposition methods.
Original languageEnglish
Article number1292
Pages (from-to)1-13
Number of pages13
Issue number7
Early online date30 Jun 2020
Publication statusPublished - Jul 2020


  • Electrodeposition
  • Nanostructure
  • NiCo O
  • Supercapacitors

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