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Fabrication of Co3O4@Co–Ni sulfides core/shell nanowire arrays as binder-free electrode for electrochemical energy storage

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  • Hong, Wei
  • Wang, Jinqing
  • Li, Zhangpeng
  • Yang, Shengrong

Abstract

The rational design and construction of efficient electrodes for applications in energy storage have been widely conducted. In this work, we have demonstrated a binder-free electrode composed of Co3O4@Co–Ni-sulfides core/shell nanowire arrays with tunable Ni/Co ratio for the high-performance pseudo-capacitors. This as-fabricated electrode can offer the desired structural features for the efficient usage of active materials. With the advantages of the well-ordered architecture, this hierarchical electrode shows a high specific capacitance of 1844 F g−1 (7.38 F cm−2) at a current density of 5 mA cm−2. Besides, an asymmetric supercapacitor based on this synthesized electrode can deliver a maximum energy density of 44.8 Wh kg−1 and a good cycling stability of 91% retention after 4000 cycles. Our results presented here demonstrate that this hierarchical electrode has potential usage in electrochemical energy storage.

Suggested Citation

  • Hong, Wei & Wang, Jinqing & Li, Zhangpeng & Yang, Shengrong, 2015. "Fabrication of Co3O4@Co–Ni sulfides core/shell nanowire arrays as binder-free electrode for electrochemical energy storage," Energy, Elsevier, vol. 93(P1), pages 435-441.
    • Handle: RePEc:eee:energy:v:93:y:2015:i:p1:p:435-441
    DOI: 10.1016/j.energy.2015.09.053
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    Cited by:

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    2. Nguyen, Tuyen & Boudard, Michel & João Carmezim, M. & Fátima Montemor, M., 2017. "NixCo1-x(OH)2 nanosheets on carbon nanofoam paper as high areal capacity electrodes for hybrid supercapacitors," Energy, Elsevier, vol. 126(C), pages 208-216.
    3. Zhang, Jijun & Chen, Zexiang & Wang, Yan & Li, Hai, 2016. "Morphology-controllable synthesis of 3D CoNiO2 nano-networks as a high-performance positive electrode material for supercapacitors," Energy, Elsevier, vol. 113(C), pages 943-948.
    4. Kim, Hong-Ki & Lee, Seung-Hwan, 2016. "Enhanced electrochemical performances of cylindrical hybrid supercapacitors using activated carbon/ Li4-xMxTi5-yNyO12 (M=Na, N=V, Mn) electrodes," Energy, Elsevier, vol. 109(C), pages 506-511.
    5. Mei, Junfeng & Fu, Wenbin & Zhang, Zemin & Jiang, Xiao & Bu, Han & Jiang, Changjun & Xie, Erqing & Han, Weihua, 2017. "Vertically-aligned Co3O4 nanowires interconnected with Co(OH)2 nanosheets as supercapacitor electrode," Energy, Elsevier, vol. 139(C), pages 1153-1158.

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