Template Synthesis of Mesoporous Nanocrystalline VN Electrode Materials and Its Supercapacitive Behavior

doi:10.3724/SP.J.1077.2012.12110

Abstract

Abstract: Using hexadecyl trimethyl ammonium bromide (CTAB) as the template, mesoporous VN nanocrystalline was synthesized by NH₃ reduction of precursor V₂O₅. The structure and surface morphology of mesoporous VN were characterized by XRD and TEM. Specific area and pore size distribution were studied by N₂ absorption. The XRD result indicated that VN nanocrystalline belonged to the cubic crystal system. VN nanoparticles were in dimension of about 10 nm. N₂absorption result indicated that the surface area of VN sample was 88 m²/g, and most pores were distributed in the range of 2–6 nm. The supercapacitive behavior of VN electrode in 1 mol/L KOH electrolyte was studied by cyclic voltammetry (CV) and constant current charge-discharge measurements. The results showed that mesoporous VN electrode had both electrical double-layer capacitive properties and redox pseudocapacitive properties. The specific capacitance was of VN electrode 517 F/g at 1 mV/s scan rate, when the scan rate was up to 10 mV/s, its specific capacitance maintained 275 F/g.

Key words: electrochemical capacitor, mesoporous materials, VN nanocrystalline, specific surface area, specific capacitance

CLC Number:

TM53

GAO Zhao-Hui, ZHANG Hao, CAO Gao-Ping, HAN Min-Fang, YANG Yu-Sheng. Template Synthesis of Mesoporous Nanocrystalline VN Electrode Materials and Its Supercapacitive Behavior[J]. Journal of Inorganic Materials, 2012, 27(12): 1261-1265.

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