<abstract xmlns="http://www.w3.org/1999/xhtml">Hollow V2O5 microspheres (HVOM) were fabricated using NH4VO3, ethylene glycol and carbon spheres as the starting materials by a template solvothermal approach and subsequent calcination. The morphology and composition were characterized by field emission scanning electron microscopy (FE-SEM), X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Brunauer-Emmet-Teller (BET). The results showed that the obtained HVOM were constructed from nanoparticles with rough surface. The electrochemical properties of HVOM as a supercapacitor electrode were investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD). HVOM displayed excellent pseudocapacitance property and their specific capacitances were 488 F·g–1, 455 F·g–1, 434 F·g–1 and 396 F·g–1 at the current density of 0.5 A·g–1, 1 A·g–1, 2 A·g–1 and 5 A·g–1, respectively. They also exhibited an excellent energy density of 8.784 × 105 J·kg–1 at a power density of 900 W·kg–1 . The good electrochemical properties of the as-synthesized HVOM make them a promising candidate as a cathode material for supercapacitors.</abstract>

Hollow V2O5 microspheres (HVOM) were fabricated using NH4VO3, ethylene glycol and carbon spheres as the starting materials by a template solvothermal approach and subsequent calcination. The morphology and composition were characterized by field emission scanning electron microscopy (FE-SEM), X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Brunauer-Emmet-Teller (BET). The results showed that the obtained HVOM were constructed from nanoparticles with rough surface. The electrochemical properties of HVOM as a supercapacitor electrode were investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD). HVOM displayed excellent pseudocapacitance property and their specific capacitances were 488 F·g–1, 455 F·g–1, 434 F·g–1 and 396 F·g–1 at the current density of 0.5 A·g–1, 1 A·g–1, 2 A·g–1 and 5 A·g–1, respectively. They also exhibited an excellent energy density of 8.784 × 105 J·kg–1 at a power density of 900 W·kg–1 . The good electrochemical properties of the as-synthesized HVOM make them a promising candidate as a cathode material for supercapacitors.

Synthesis and characterization of hollow V2O5 microspheres for supercapacitor electrode with pseudocapacitance

Materials Science-Poland

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Synthesis and characterization of hollow VO microspheres for supercapacitor electrode with pseudocapacitance

Hollow V2O5 microspheres (HVOM) were fabricated using NH4VO3, ethylene glycol and carbon spheres as the starting materials by a template solvothermal approach...

Synthesis and characterization of hollow V₂O₅ microspheres for supercapacitor electrode with pseudocapacitance

Published Online: Feb 24, 2017

Page range: 188 - 196

Received: May 31, 2016

Accepted: Dec 14, 2016

DOI: https://doi.org/10.1515/msp-2017-0015

Keywords
VO, hollow microspheres, electrical properties, supercapacitor, pseudocapacitance

© 2017 Yifu Zhang

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Synthesis and characterization of hollow V2O5 microspheres for supercapacitor electrode with pseudocapacitance

Published Online: Feb 24, 2017

Page range: 188 - 196

Received: May 31, 2016

Accepted: Dec 14, 2016

DOI: https://doi.org/10.1515/msp-2017-0015

KeywordsVO, hollow microspheres, electrical properties, supercapacitor, pseudocapacitance

© 2017 Yifu Zhang

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Synthesis and characterization of hollow V₂O₅ microspheres for supercapacitor electrode with pseudocapacitance

Keywords
VO, hollow microspheres, electrical properties, supercapacitor, pseudocapacitance