J. Mater. Sci. Technol. ›› 2020, Vol. 54: 69-76.DOI: 10.1016/j.jmst.2020.02.063

• Research Article • Previous Articles     Next Articles

Facile synthesis of hierarchical Ni3Se2 nanodendrite arrays for supercapacitors

Licheng Zhaoa, Ping Zhanga,*(), Yanan Zhangb, Zhi Zhangb, Lei Yanga,*(), Zhi-Gang Chenc   

  1. a School of Materials Science & Engineering, Sichuan University, Chengdu 610064, China
    b Center for Nanoscale Characterization & Devices (CNCD), School of Physics & Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, China
    c Centre for Future Materials, University of Southern Queensland, Springfield, Queensland, 4300, Australia
  • Received:2020-01-17 Revised:2020-02-09 Accepted:2020-02-20 Published:2020-10-01 Online:2020-10-21
  • Contact: Ping Zhang,Lei Yang

Abstract:

Rational design has been widely used to develop high-performance metal selenides-based electrode materials for supercapacitors. In this study, we develop a facile one-step solvothermal approach to synthesize binder-free Ni3Se2 nanodendrite arrays grown on nickel foam as advanced positive electrodes for supercapacitors. Our Ni3Se2 nanodendrite arrays on nickel foam exhibit a specific capacitance of 1234 F g-1 (3.70 F cm-2) at a current density of 1 A g-1 and a great rate capability, which is benefited from the excellent electrical conductivity and unique hierarchical nano-dendritic structure. Furthermore, an asymmetric supercapacitor device was assembled using activated carbon as the negative electrode and the Ni3Se2 nanodendrite arrays on nickel foam as the positive electrode, obtaining a high energy density of 22.3 W h kg-1 at a power density of 160.4 W kg-1.

Key words: Ni3Se2Nanodendrite, Binder-free, Capacitance, Supercapacitors