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

Authors

Zhuo Jin Lao, University of WollongongFollow
Konstantin Konstantinov, University of WollongongFollow
Y Tournayre, University of WollongongFollow
See How Ng, University of WollongongFollow
Guoxiu Wang, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow

RIS ID

17962

Publication Details

Lao, Z, Konstantinov, KK, Tournaire, Y, Ng, S, Wang, G & Liu, HK (2006), Synthesis of vanadium pentoxide powders with enhanced surface-area for electrochemical capacitors, Journal of Power Sources, 162(2), pp. 1451-1454.

Abstract

Single-phase, chemically pure vanadium pentoxide (V₂O₅) 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 V₂O₅ powders have a high specific surface-area of 41 m² g⁻¹. V₂O₅ 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.