Electrolyte for electrolyte circulation-type battery, and electrolyte circulation-type battery system

摘要

Provided is an electrolyte for an electrolyte circulation-type battery that is supplied to an electrolyte circulation-type battery, wherein the total concentration of elemental ions from groups 1-8 and 13-16 of the fifth period of the periodic table, and elemental ions from groups 1, 2, 4-8 and 13-15 of the sixth period of the periodic table, which are impurity elemental ions which participate in the generation of gas containing elemental hydrogen, does not exceed 610 mg/L, the concentration of vanadium ions is 1 mol/L to 3 mol/L, the concentration of free sulfuric acid is 1 mol/L to 4 mol/L, the concentration of phosphoric acid is from 1.0 × 10