Rich-grain-boundary Ni–Co–Se nanowire arrays for fast charge storage in alkaline electrolyte

Li Wang, Mengqi Cui, Jianwei Ren, Hui Wang, Qianqian Fu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In this work, the one-dimensional (1D) Ni-Co-Se nanowire arrays with rich grain-boundaries were prepared through the solvothermal method and gas-phase selenizaiton. The results showed that the structure and crystallization of the Ni-Co-Se nanowire arrays could be modulated through the optimization of selenizaiton time. The optimal Ni-Co-Se electrode sample displayed an area specific capacitance of 242.6 μAh cm−2 at 30 mA cm−2 with a current retention rate of 68.34%. The assembled Ni-Co-Se/Active carbon (AC) electrode-based asymmetric supercapacitor (ASC) showed the area specific capacitances of 329.2 μAh cm−2 and 225.8 μAh cm−2 at 3 mA cm−2 and 30 mA cm−2, respectively. A 73.33% retention rate of capacitance was observed after 8000 charge/discharge cycles. Besides, the further fabricated all-solid ASC delivered the power densities of 342.94 W kg−1 and 3441.33 W kg−1 at the energy densities of 37.62 Wh kg−1 and 25.81 Wh kg−1, respectively. Those results suggested the potentials of the obtained Ni-Co-Se nanowire arrays as electrode material for the high-performance pseudocapacitors.

Original languageEnglish
Article number035707
Issue number3
Publication statusPublished - 15 Jan 2024


  • 1D nanowires
  • NiCoO
  • Se-doping
  • energy storage capacity
  • grain boundary

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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