Redox flow battery that uses complexes of cobalt and iron with amino-alcohol ligands in alkaline electrolytes to store electrical energy

A redox flow battery system, comprising:

• one or more power sources;
• and
• a redox flow battery connected to said one or more power sources via an AC/DC converter, wherein said redox flow battery is configured to store electrical energy from said one or more power sources via said AC/DC converter, wherein said redox flow battery comprises:
• a first electrolyte storage, wherein said first electrolyte storage comprises a first metal complex selected from a first-row of transition metal ions with a first amino-alcohol ligand as an electroactive species in an alkaline electrolyte;
• a second electrolyte storage, wherein said second electrolyte storage comprises a second metal complex selected from said first-row of transition metal ions with a second amino-alcohol ligand as an electroactive species in said alkaline electrolyte;
• an electrochemical cell connected to said first and second electrolyte storages, wherein said electrochemical cell comprises a first half-cell and a second half-cell, wherein said first half-cell comprises a first high surface area electrode functioning as an anode, wherein said second half-cell comprises a second high surface area electrode functioning as a cathode, wherein said first and second half-cells are separated from each other by an ion exchange membrane;
• and
• a first and a second pump for circulating said electrolytes in said first and second electrolyte storages, respectively, in said anode and said cathode, respectively.