<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

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 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

Pubblicato online: 24 feb 2017

Pagine: 188 - 196

Ricevuto: 31 mag 2016

Accettato: 14 dic 2016

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

Parole chiave
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

Pubblicato online: 24 feb 2017

Pagine: 188 - 196

Ricevuto: 31 mag 2016

Accettato: 14 dic 2016

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

Parole chiaveVO, 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

Parole chiave
VO, hollow microspheres, electrical properties, supercapacitor, pseudocapacitance