Enhanced active sites possessing three-dimensional ternary nanocomposites of reduced graphene oxide/polyaniline/Vulcan carbon for high performance supercapacitors

Nickel nanoparticles embedded in porous carbon nanofibers and its electrochemical properties

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.

Polyaniline-modified nanocellulose prepared from Semantan bamboo by chemical polymerization: preparation and characterization

Polyaniline/crystalline nanocellulose (PANi/CNC) was prepared via in situ oxidative polymerization of aniline in the presence of crystalline nanocellulose from Semantan bamboo (Gigantochloa scortechinii).