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  • Title: Nickel nanoparticles embedded in porous carbon nanofibers and its electrochemical properties.
    Author: Bai Z, Liu S, Chen P, Cheng G, Wu G, Li H, Liu Y.
    Journal: Nanotechnology; 2020 Jul 24; 31(30):305705. PubMed ID: 32235076.
    Abstract:
    Flexible porous carbon nanofibers containing nickel nanoparticles were synthesized by direct carbonization of electrospun Ni-MOFs/polyacrylonitrile fibers. The as-synthesized composite nanofibers were employed as binder-free electrodes, and exhibit high specific capacitance (up 672 F g-1 at current density of 2 A g-1) and superior rate capability (57% capacitance retention from current density of 2-10 A g-1), which may be attributed to their binder-free nature, unique one-dimensional (1D) structure and highly dispersed electrochemically active nickel nanoparticles. Furthermore, a symmetric supercapacitor was assembled using the fiber electrodes in 6 M KOH, and the energy density of 17.8 Wh kg-1 was achieved in a potential window of 1.5 V. This self-standing fiber with abundant mesopores and macropores is expected to become a promising electrode material for high-performance supercapacitors.
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