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

Yifu Zhang
Yifu Zhang
   | Feb 24, 2017
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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
© 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.

FE-SEM images of the template carbon spheres.
FE-SEM images of the template carbon spheres.

FE-SEM images of the as-obtained sample.
FE-SEM images of the as-obtained sample.

XRD patterns of the as-obtained hollow microspheres.
XRD patterns of the as-obtained hollow microspheres.

IR spectrum of the as-obtained HVOM.
IR spectrum of the as-obtained HVOM.

(a) Nitrogen adsorption-desorption isotherms and (b) BET curve of the as-obtained HVOM.
(a) Nitrogen adsorption-desorption isotherms and (b) BET curve of the as-obtained HVOM.

CV curves of HVOM in 1 mol·dm–3 LiNO3 at a scan rate 20 mV·s–1: (a) on various potential limits; (b) compared with foamed Ni.
CV curves of HVOM in 1 mol·dm–3 LiNO3 at a scan rate 20 mV·s–1: (a) on various potential limits; (b) compared with foamed Ni.

(a) Galvanostatic charge and discharge curves at different current densities of HVOM; (b) Ragone plot of HVOM.
(a) Galvanostatic charge and discharge curves at different current densities of HVOM; (b) Ragone plot of HVOM.

Cycling behavior of HVOM recorded by CV at 20 mV·s–1 scan rate.
Cycling behavior of HVOM recorded by CV at 20 mV·s–1 scan rate.

Cycling behavior of HVOM recorded at a current density of 1 A·g–1 by GCD: (a) galvanostatic charge and discharge curves; (b) cyclic stability of the specific capacitance.
Cycling behavior of HVOM recorded at a current density of 1 A·g–1 by GCD: (a) galvanostatic charge and discharge curves; (b) cyclic stability of the specific capacitance.

Comparison of specific capacitance of the HVOM with V2O5 materials reported in the previous literature.

Types of V2O5 materialElectrolytePotential range [V]Specific capacitance [F·g–1]Literature
V2O5 nanoflowers, nanoballs, nanowires, nanorods1 mol·dm–3 Na2SO40 to 1119, 161, 177, 235[28]
V2O5 nanobelts, nanoparticles, microspheres1 mol·dm–3 LiNO3–0.4 to 0.8140, 276, 308[3]
Electrospun V2O5 nanofibers2 mol·dm–3 KCl0 to 0.9 V190[26]
Electrospun V2O5 nanofibers1 mol·dm–3 LiClO4 in PC0 to 3250[26]
Nano porous V2O52 mol·dm–3 KCl–0.2 to 0.8214[38]
V2O5 powders2 mol·dm–3 KCl–0.2 to 0.7262[39]
Interconnected V2O5 nanoporous network0.5 mol·dm–3 K2SO40.2 to 0.8 V304[27]
V2O5 nanowires1 mol·dm–3 LiNO3–0.4 to 0.8351[24]
Hollow spherical V2O55 mol·dm–3 LiNO3–0.2 to 0.8479[22]
β-V2O5 thin films1 mol·dm–3 LiClO4 in PC–0.8 to 1.2346[40]
Hollow V2O5 microspheres1 mol·dm–3 LiNO3–0.4 to 0.6488This work
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