Positive electrode electrolyte for alkaline total-iron flow battery and preparation method of positive electrode electrolyte

The invention discloses a positive electrode electrolyte for an alkaline total iron flow battery and a preparation method thereof, the positive electrode electrolyte is prepared from ferrocyanide, a stabilizer, an oxygen evolution inhibitor, an alkaline component, an auxiliary electrolyte and water at a certain temperature, the total iron concentration is 0.1-2.0 mol/L, the molar ratio of the stabilizer to Fe is 0.05-1.0, the concentration of the oxygen evolution inhibitor is 0.5-10 mg/L, the alkaline component is 0.5-3.0 mol/L, the auxiliary electrolyte is 0.5-1.0 mol/L, the auxiliary electrolyte is 0.5-1.0 mol/L, and the water is 0.5-1.0 mol/L; and 0-1.0 mol/L of an auxiliary electrolyte. According to the positive electrode electrolyte for the alkaline total iron flow battery, the oxygen evolution overpotential of the strong alkaline positive electrode electrolyte can be improved, the oxygen evolution rate can be reduced, the electrochemical activity of ferrocyanide can be improved, generation of ferric hyd