Self-assembled three-dimensional hierarchical porous V₂O₅/graphene hybrid aerogels for supercapacitors with high energy density and long cycle life

Abstract

A self-assembled three-dimensional hierarchical porous V2O5/graphene hybrid aerogel for high-performance supercapacitor was synthesized.

Hydrothermal preparation and supercapacitive performance of flower-like WO3·H2O/reduced graphene oxide composite

“…Generally, transition metal (Ru, Mn, Ni, Co, and V) oxides have been http://dx.doi.org/10.1016/j.colsurfa.2015.06.040 0927-7757/© 2015 Elsevier B.V. All rights reserved. employed as pseudocapacitor electrodes and have shown good pseudocapacitive performances [3][4][5][6][7][8][9]. Moreover, it has been found that the electrochemical performances of the electrode materials are strongly dependent on their sizes, morphologies and structures.…”

Novel three-dimensional island-chain structured V2O5/graphene/MWCNT hybrid aerogels for supercapacitors with ultralong cycle life

“…(GN and MWCNT). 13,22,40 Since the specic capacitance is proportional to the area of CV curve, the largest curve area also indicates that WMNA possess larger specic capacitance than that of raw V 2 O 5 powder and V 2 O 5 aerogels. This may be a consequence of developed surface area, the synergistic effect and improved the electrical conductivity by GN and MWCNT.…”

“…22,25 The electrodes were prepared by homogeneous mixing active materials, acetylene black and poly(vinylidene uoride) (PVDF) dispersed in N-methylpyrrolidone (NMP) at the mass ratio of 8 : 1 : 1. The obtained mixture was coated onto graphite papers (1 cm  3 cm) and the area is about 1 cm 2 , and nally dried in a vacuum oven at 120 C for 12 hours.…”

Recent Advances in Nanostructured Vanadium Oxides and Composites for Energy Conversion

“…[10a,192] The specific capacitance and capacitance retention have been dramatically improved with the induce of rGO (Figure 16c). [193] Similarly, V 2 O 5 /rGO hybrid aerogels can be prepared following the procedures as shown in Figure 16d, where V 2 O 5 nanowires were grown on the rGO surface (Figure 16e). [193a] V 2 O 5 /rGO aerogel was measured to have a higher specific surface area and better capacitive performance than V 2 O 5 aerogel (Figure 16f).…”