Development of a novel redox flow battery for electricity storage system

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

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19 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)197-203
Number of pages7
JournalJournal of Applied Electrochemistry
Volume33
Issue number2
DOIs
Publication statusPublished - 2003 Feb
Externally publishedYes

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Keywords

  • Electricity storage
  • Membrane
  • Redox flow battery
  • Vanadium
  • Vycor glass/silica glass

ASJC Scopus subject areas

  • Electrochemistry

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