Performance of VN as Negative Electrode Materials in Electrochemical Capacitors

Authors

Zhao-hui GAO, College of Chemical and Environmental Engineering，China University of Mining and Technology，Beijing 100083，China;
Hao ZHANG, Research Institute of Chemical Defense，Beijing 100191，ChinaFollow
Gao-ping CAO, Research Institute of Chemical Defense，Beijing 100191，China
Min-fang HAN, College of Chemical and Environmental Engineering，China University of Mining and Technology，Beijing 100083，China;
Yu-sheng YANG, Research Institute of Chemical Defense，Beijing 100191，China

Corresponding Author

Hao ZHANG(dr.h.zhang@hotmail.com)

Abstract

Nanocrystalline vanadium nitride (VN) materials were synthesized by high temperature ammonia (NH₃) reduction of vanadium oxide (V₂O₅). The structure and morphology of VN materials were characterized by XRD，SEM and TEM, while the specific surface area, pore size distribution and supercapacitive behavior by N2 absorption, cyclic voltammetry (CV) and constant current charge-discharge measurements in 1 mol?L-1 KOH electrolyte. The results showed that the VN sample belonged to the cubic crystal system (Fm3m [225])，and had homogeneous surface and appeared nearly spherical with uniform size. As the reaction time was extended to 12 h，small particles were interconnected with each other to form some mesopores. The specific capacitance of VN-c was 192 F.g^-1 at current density of 50 mA.g^-1，and retained 150 F.g^-1 after 1000 cycles. The VN sample possessed both capacitive properties of electrical double-layer and pseudocapacitive properties of redox reactions.

Graphical Abstract

Keywords

electrochemical capacitor, nanocrystalline vanadium nitride, negative electrode materials, specific surface area, specific capacitance

DOI Link

https://doi.org/10.61558/2993-074X.2947

Publication Date

2013-04-28

Online Available Date

2012-04-29

Revised Date

2012-04-19

Received Date

2012-03-12

Recommended Citation

Zhao-hui GAO, Hao ZHANG, Gao-ping CAO, Min-fang HAN, Yu-sheng YANG. Performance of VN as Negative Electrode Materials in Electrochemical Capacitors[J]. Journal of Electrochemistry, 2013 , 19(2): Article 18.
DOI: 10.61558/2993-074X.2947
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss2/18