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Updated: Aug 28, 2025
Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Fabrication of a vanadium nitride/N-doped carbon hollow nanosphere composite as an efficient electrode material for
Xin Jiang1, Wei Lu1, Xiaodan Yu1
1Jilin Provincial Key Laboratory of Advanced Energy Materials, Department of Chemistry, Northeast Normal University Changchun 130024 PR China xingy202@nenu.edu.cn.
Abstract:
Low-cost materials and facile processes to obtain novel electrode materials for assembling asymmetric supercapacitors (ASCs) are urgently needed. Herein, a vanadium nitride/nitrogen-doped carbon nanosphere (VN/NCS) composite composed of VN nanoparticles and N-doped carbon (NC) covering the surface of VN has been prepared by the nitridation of a V2O3/C nanocomposite. The hollow VN/NCS composite with a mesoporous structure and the dispersion of VN NPs in N-doped carbon result in a VN/NCS composite with good electrochemical behavior. Moreover, the N-doped carbon layer on the surface of VN effectively inhibits the oxidation of VN during cycling in an alkaline electrolyte. With the VN/NC composite utilized as a novel active electrode material for SCs, good rate capability, specific capacitance, and cycling stability are exhibited. Strikingly, using the VN/NCS composite as a negative electrode and its precursor, the V2O3/C composite, as a positive electrode, an asymmetric supercapacitor (ASC) device, with a good energy density of 19.8 W h kg-1 at 801 W kg-1 and a short charging time of 89 s, was assembled.
