Vanadium Nitride for Electrochemical Supercapacitors
Man-Ju Tseng1,2,3*, Yan-Gu Lin2, San-Yuan Chen3
1Program for Science and Technology of Accelerator Light Source, National Chiao Tung University, Hsinchu, Taiwan
2Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu, Taiwan
3Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
* Presenter:Man-Ju Tseng,
The development of high power energy storage devices for both stationary and mobile applications has been deemed critical for the attainment of sustainable energy storage systems to meet the global energy storage demands and the development of energy efficient global systems. Vanadium nitride has displayed many interesting characteristics for its use as a pseudocapacitive electrode in an electrochemical capacitor, such as good electronic conductivity, good thermal stability, high density and high specific capacitance. In this work, VN exhibited high capacitive properties, and a maximum specific capacitance of 5.44 F/cm² was achieved at a scan rate of 0.5 mV F/cm² in ion liquid electrolyte and the potential range from -2.5 to 2.5 V. The energy density is 9.81 Wh F/cm² when the power density is 12.5 kW F/cm².

Keywords: Supercapacitor, Vandium Nitride, Electrochemistry properties, Energy storage