Capacity recovery type neutral aqueous electrolyte and neutral aqueous organic flow battery

By adding inorganic salt additives to the positive and negative electrolytes of neutral aqueous organic liquid flow batteries, the problems of low utilization and poor stability of organic active molecules at high concentrations are solved, battery capacity recovery and life extension are achieved, and battery performance is improved.

CN120657189APending Publication Date: 2025-09-16XI AN JIAOTONG UNIV
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Patent Information

Application Number
CN202510818327.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-18
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

Neutral aqueous organic flow batteries have low utilization and poor stability of organic active molecules at high concentrations, resulting in low battery capacity utilization and short cycle life.

Method used

Inorganic salt additives, such as lithium salts, calcium salts, magnesium salts, barium salts, cerium salts, etc., are added to the positive and negative electrode electrolytes to form stable complexes with organic active molecules, thereby regulating their solubility and electrochemical state, inhibiting aggregation and side reactions, and optimizing electrolyte performance.

Benefits of technology

It improves the utilization rate of organic active molecules and battery stability, extends the battery cycle life, improves the battery's energy density and charge and discharge efficiency, broadens the electrolyte operating voltage window, and reduces the occurrence of side reactions.

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Abstract

The invention discloses a capacity recovery type neutral aqueous electrolyte and a neutral aqueous organic flow battery, and belongs to the technical field of large-scale energy storage of flow batteries. Aiming at the key problems of low capacity utilization rate, poor cycling stability and the like commonly existing in the existing neutral aqueous organic flow battery under the condition of high-concentration organic active molecules, a specific type of inorganic salt additive is introduced into positive and negative electrolyte. The introduction of the inorganic salt additive improves the ion mobility and the electronic conductivity of the electrolyte, optimizes the reaction kinetics at an electrode / electrolyte interface, and effectively improves the reversible reaction efficiency and the electrochemical utilization rate of organic active molecules. In addition, the additive can also inhibit the aggregation, induced failure and other reactions of organic molecules and charged intermediates thereof in the charging and discharging process, the existence state and microenvironment are regulated and controlled from the molecular level, the electrochemical stability of the organic active molecules is enhanced, the capacity fading is delayed, and the service life of the battery is remarkably prolonged.
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