US 12,183,925 B2Granted

Redox flow battery for storing electrical energy in underground storage means, and use thereof

AssigneeFriedrich-Schiller-Universitaet Jena

InventorsUlrich Sigmar Schubert, Martin Hager

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Abstract

A redox flow battery for storing electrical energy is described, comprising a reaction cell with two electrode chambers for catholyte and anolyte, each of which is connected to at least one liquid reservoir, the electrode chambers being separated by a membrane, being equipped with electrodes, and each being filled with electrolyte solutions which contain redox-active components dissolved or dispersed in an aqueous electrolyte solvent, as well as conducting salts dissolved therein and possibly further additives. A second embodiment relates to a redox flow battery for storing electrical energy, comprising a reaction cell with an electrode chamber for an electrolyte solution, which is connected to at least one liquid reservoir, the electrode chamber being equipped with a cathode and an anode, and being filled with electrolyte solution which contains redox-active components dissolved or dispersed in an aqueous electrolyte solvent, as well as conductive salts dissolved therein and possibly further additives. The redox flow cells are characterized in that the at least one liquid reservois is an underground storage means in which temperatures of at least 30° C. prevail, in that the concentration of the salts dissolved in the electrolyte solutions is at least 10% by weight, and in that the catholyte or the electrolyte solution contains selected redox-active and temperature-stable components. In the first embodiment, the anolyte contains a water-soluble redox-active component and in the second embodiment, the anolyte or the electrolyte solution contains a zinc salt.

Claims17

Dependent claims

A redox-flow-battery for storing electrical energy comprising a reaction cell with two electrode chambers for a catholyte and an anolyte, which are each connected to at least one liquid reservoir, the electrode chambers being separated by a membrane, being equipped with electrodes, and each being filled with electrolyte solutions which contain redox-active components dissolved or dispersed in an aqueous electrolyte solvent, as well as conductive salts dissolved therein and possibly further additives, characterized in that

the at least one liquid reservoir is an underground storage means in which temperatures of at least 30° C. prevail, in that
the concentration of the salts dissolved in the electrolyte solutions is at least 10% by weight, in that
the anolyte contains a water-soluble or water-dispersible redox-active component, and
that the catholyte contains at least one compound or composition selected from one of the groups b), c), or d) as redox-active component, wherein
b) is an organic compound comprising at least one redox-active residue of formula (Ia)
in combination with hydrochloric acid and/or a salt selected from the group consisting of ammonium salts with inorganic or organic anions, salts with tetrafluoroborate anions or salts of trifluoromethanesulfonic acid,
c) is an organic compound comprising at least one redox-active residue of the formula (Ib)
d) is an organic compound comprising at least one redox-active residue of the formula (Ic)
R7, R8, R9 and R10 represent alkyl or each of R7 and R8 and R9 and R10 together with the common carbon atom form a cycloaliphatic or heterocyclic residue,
Q is —O—, —S—, —NH—, —NR13a, —, —NR13aR13b+—(Anm−)1/m, —PR13a— or —SiR13aR13b—,
R11 is —O or —S,
R12 is —CH2—, —O—, —S—, —SO—, —SO2——NR13— or —N+R13R14— (Anm−)1/m,
R13, R13a, R13b and R14 independently of one another are monovalent organic residues, and
An is an m-valent anion and m is an integer of 1-4.

11 more elements

A redox-flow-battery for storing electrical energy, comprising a reaction cell with an electrode chamber for an electrolyte solution, which is connected to at least one liquid reservoir, the electrode chamber being equipped with a cathode and an anode, the electrode chamber being filled with electrolyte solution which contains redox-active components dissolved or dispersed in an aqueous electrolyte solvent, as well as conductive salts dissolved therein and optionally further additives, characterized in that

the at least one liquid reservoir is an underground storage means in which temperatures of at least 30° C. prevail, in that
the concentration of the salts dissolved in the electrolyte solutions is at least 10% by weight, in that
anolyte contains a water-soluble or water-dispersible redox-active component, and
a catholyte contains at least one compound or composition selected from one of the groups b), c), or d) as redox-active component, wherein
b) is an organic compound comprising at least one redox-active residue of formula (Ia)
in combination with hydrochloric acid and/or a salt selected from the group consisting of ammonium salts with inorganic or organic anions, salts with tetrafluoroborate anions or salts of trifluoromethanesulfonic acid,
c) is an organic compound comprising at least one redox-active residue of the formula (Ib)
d) is an organic compound comprising at least one redox-active residue of the formula (Ic)
R7, R8, R9 and R10 represent alkyl or each of R7 and R8 and R9 and R10 together with the common carbon atom form a cycloaliphatic or heterocyclic residue,
Q is —O—, —S—, —NH—, —NR13a, —, —NR13aR13b+—(Anm−)1/m, —PR13a— or
—SiR13aR13b—,
R11 is —O or —S,
R12 is —CH2—, —O—, —S—, —SO—, —SO2——NR13— or —N+R13R14—(Anm−)1/m,
R13, R13a, R13b and R14 independently of one another are monovalent organic residues, and
An is an m-valent anion and m is an integer of 1-4.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/297,777Filed 27 Nov 2019
Priority: DE 10 2018 009 363.929 Nov 2018
Published: US 2022/0020990 A120 Jan 2022
Granted: 31 Dec 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H01M 4/60
Selection of substances as active materials, active masses, active liquids: of organic compounds
H01M 4/368
Selection of substances as active materials, active masses, active liquids: liquid depolarisers
H01M 8/188
Regeneration by electrochemical means: by recharging of redox couples containing fluids; Redox flow type batteries
Y02E 60/10
Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation: energy storage using batteries

Family

US 2022/0020990 A1Pre-grant publication · published 20 Jan 2022
US 12,183,925 B2This patent

From the US filing history. Foreign family members aren’t listed.

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