Synthesis of vanadium pentoxide powders with enhanced surface-area for electrochemical capacitors

Single-phase, chemically pure vanadium pentoxide (V 2O 5) powders are prepared by co-precipitation and further calcination at 300 °C. The materials obtained are agglomerated in sub-micron particles, and BET analysis shows that the as-prepared V 2O 5 powders have a high specific surface-area of 41 m...

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Bibliographic Details
Published in:Journal of power sources 2006-11, Vol.162 (2), p.1451-1454
Main Authors: Lao, Z.J., Konstantinov, K., Tournaire, Y., Ng, S.H., Wang, G.X., Liu, H.K.
Format: Article
Language:English
Subjects:
Applied sciences
Capacitors. Resistors. Filters
Co-precipitation
Electrical engineering. Electrical power engineering
Electrochemical capacitor
Exact sciences and technology
Specific surface-area
Vanadium pentoxide
Various equipment and components
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Summary:Single-phase, chemically pure vanadium pentoxide (V 2O 5) powders are prepared by co-precipitation and further calcination at 300 °C. The materials obtained are agglomerated in sub-micron particles, and BET analysis shows that the as-prepared V 2O 5 powders have a high specific surface-area of 41 m 2 g −1. V 2O 5 shows the highest capacitance in 2 M KCl electrolyte when compared with other electrolytes such as 2 M NaCl and 2 M LiCl. It yields a maximum specific capacitance of 262 F g −1. The higher specific surface-area may be the reason for the high capacitance compared with previously published results.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2006.07.060