Development of a novel redox flow battery for electricity storage system

B. Fang, Y. Wei, T. Arai, S. Iwasa, M. Kumagai

研究成果: Article

19 引用 (Scopus)

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A novel cylindrical battery which uses carbon fibres with high specific surface area as electrodes and a porous silica glass with high chemical stability as membrane has been fabricated. The results obtained from electrolysis of 0.5 M K3Fe(CN)6-0.5 M KCl and of 85 mM V(IV) M H2SO4 indicate that the cell possesses excellent electrolytic efficiency. As a redox flow battery (RFB) its performance was investigated by employing all-vanadium sulfate electrolytes. The results of the cyclic voltammetry measurements indicate that at a glassy carbon electrode the electrochemical window for 2 M H2SO4 solution could reach 2.0 ∼ 2.4 V. Constant current charging-discharging tests indicate that the batteries could deliver a specific energy of 24 Wh L-1 at a current density of 55 mA cm-2. The open-circuit cell voltage, after full charging, remained constant at about 1.51 V for over 72 h, while the coulombic efficiency was over 91%, showing that there was negligible self-discharge due to active ions diffusion through the membrane during this period.

元の言語English
ページ(範囲)197-203
ページ数7
ジャーナルJournal of Applied Electrochemistry
33
発行部数2
DOI
出版物ステータスPublished - 2003 2 1
外部発表Yes

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ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry
  • Materials Chemistry

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