Synthesis of Ni-doped Flower-Like Carbon Nanosheet Aggregations for Supercapacitors

Ni-doped flower-like carbon nanosheet aggregations (Ni/FCNAs) were synthesized via a one-pot solvothermal method followed by a subsequent calcination process at 900 degrees C in nitrogen atmosphere. The surface morphologies and structures of composites were examined by scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD). Cyclic voltammetry and galvanostatic charge/discharge experiments were adopted to investigate their electrochemical behaviors. The results show that the doped nickel particles could enhance both specific capacitance and electrochemical stability. The Ni/FCNAs show large specific capacitance up to 176 F . g(-1) with the current density of 0.1 A . g(-1). The possible formation mechanism of Ni/FCNAs has also been proposed on the basis of experimental results.