Facile synthesis of MnO2@NiCo2O4 core–shell nanowires as good performance asymmetric supercapacitor

  • Xiuhua WangEmail author
  • Yuan Yang
  • Peng He
  • Fuqiang Zhang
  • Jiping Tang
  • Zeyu Guo
  • Ronghui QueEmail author


Hierarchical MnO2@NiCo2O4 core–shell nanostructures are well fabricated via a simple two-step hydrothermal process. The MnO2@NiCo2O4 core–shell nanostructures materials electrode presents a high capacitance of 684 F g−1 at 2 A g−1 current density, 40 times higher than that of the single MnO2 nanowires electrode. And 87.4% retain is approached even at a high current density of 15 A g−1, showing satisfactory rate capability. Furthermore, the theoretical analysis reveals the surface capacitance contribution is predominant in the capacitive contribution. The asymmetric supercapacitor assembled with MnO2@NiCo2O4 exhibited a maximum energy density of 35.6 Wh kg−1 and a maximum power density of 745.1 W kg−1. After 7000 charge–discharge cycling at a current density of 4 A g−1, it still can maintain 90% of the initial capacitance. These results suggest that MnO2@NiCo2O4 is the promising candidate of supercapacitors.



The financial support from the National Natural Science Foundation of China (Nos. 21301007 and 21301006) and Anhui Normal University Nurturing Project (No. 2016XJJ001) are acknowledged.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10854_2019_2649_MOESM1_ESM.docx (6.6 mb)
Supplementary material 1 (DOCX 6745 kb)


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Authors and Affiliations

  1. 1.Anhui Key Laboratory of Molecule-Based Materials, The Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials ScienceAnhui Normal UniversityWuhuChina

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