REDOX FLOW BATTERY

摘要

Disclosed are: a redox flow battery (RF battery) that can minimize the precipitation of precipitates while still producing a high emf; and a method for running a redox flow battery. The disclosed RF battery (100) charges and discharges a battery cell by supplying a positive-electrode electrolyte solution and a negative-electrode electrolyte solution thereto. Said battery cell is provided with a positive electrode (104), a negative electrode (105), and a barrier membrane (101) interposed between the electrodes (104 and 105). The positive-electrode electrolyte solution contains either manganese ions or both manganese ions and titanium ions. The negative-electrode electrolyte solution contains at least one of the following metal ions: titanium ions, vanadium ions, chromium ions, zinc ions, and lead ions. By including titanium ions in the positive-electrode electrolyte solution and running the RF battery (100) such that the charging depth of the positive-electrode electrolyte solution is at most 90%, the precipitation of precipitates such as MnO2 is minimized, resulting in good charging and discharging characteristics. Also, the disclosed RF battery (100) produces an emf equivalent to or greater than that of conventional vanadium redox flow batteries.