▎ 摘　　要

NOVELTY - A cathode flow electrode solution comprises an electrolyte, a conductive agent, a redox active material and a solvent. USE - Solution used in cathode flow electrode chamber of flow electrode capacitance deionization device for purifying water (all claimed). ADVANTAGE - The cathode flow electrode solution is economical, reduces energy consumption, improves charge efficiency and removal efficiency (by adding redox active material), improves regeneration, stable cycle performance and resistance of the flow electrode capacitance deionization device, and can improve purification effect of the flow electrode capacitance deionization device on water bodies. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a flow electrode capacitance deionization device, which comprises an anode flow electrode chamber, a water inlet chamber, and a cathode flow electrode chamber containing the cathode flow electrode solution.