Granted Patent
B2
US 12,731,806 · App. 18/031,751 · Granted Sep 8, 2026
Electrolyte regeneration for organic redox flow batteries based on water-soluble phenazine-based compounds
Inventors:
Olga Ekkert (Hanau, DE); Evgeny Larionov (Hanau, DE); Jan Hartwig (Alezenau, DE); Eduard Baal (Offenbach, DE)
Assignee:
CMBLU Energy AG
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Abstract
The present invention provides a process for the regeneration of an electrolyte solution of a redox-flow battery containing at least one (preferably substituted) phenazine compound, said process comprising at least one of the following steps (a), (b) and (c): (a) treatment of the electrolyte solution to be regenerated in order to convert organic degradation compounds contained therein to a (substituted) phenazine compound; (b) removal of precipitated material from the electrolyte solution and subsequent modification of the precipitated organic degradation compounds to obtain a (substituted) phenazine compound; and (c) separation of redox active compounds other than (substituted) phenazine compounds in particular inorganic electrolytes, from an electrolyte solution containing (substituted) phenazine compounds, and/or separation of (substituted) phenazine compounds from a solution containing redox active compounds other than (substituted) phenazine compounds.
Claims (7)
1 . A process for the regeneration of an electrolyte solution of a redox-flow battery containing at least one phenazine compound, the process comprising:
treating the electrolyte solution to be regenerated to convert organic degradation compounds contained therein to a phenazine compound;
wherein the phenazine compound is selected from the group consisting of:
2 . The process of claim 1 , wherein the electrolyte solution is an aqueous solution.
3 . The process of claim 1 , wherein the electrolyte solution further contains a base, wherein the base is sodium or potassium hydroxide.
4 . The process of claim 1 , wherein the electrolyte solution is treated with an oxidizing agent.
5 . The process of claim 4 , wherein the oxidizing agent is O 2 or H 2 O 2 .
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Sep 22, 2025
From: EKKERT, OLGA; LARIONOV, EVGENY; BAAL, EDUARD
To: CMBLU ENERGY AG
Reel/Frame 072323/0073 →
Continuity (1)
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