MITIGATION OF CROSSOVER WITHIN FLOW BATTERIES
First Claim
1. A flow battery comprising:
- a first half-cell containing a first electrolyte solution, the first electrolyte solution comprising a coordination complex as a first active material;
wherein the coordination complex comprises a redox-active metal center and an organic compound bound to the redox-active metal center; and
a second half-cell containing a second electrolyte solution, the second electrolyte solution comprising an unbound form of the organic compound, or a corresponding oxidized or reduced variant thereof, as a second active material.
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Accused Products
Abstract
Crossover of active materials in an electrochemical cell can detrimentally impact operating performance, particularly for flow batteries. Flow batteries with tolerance toward crossover of active materials can incorporate a first half-cell containing a first electrolyte solution that includes a coordination complex as a first active material, and a second half-cell containing a second electrolyte solution that includes an unbound form of an organic compound as a second active material. The coordination complex contains a redox-active metal center and an organic compound bound to the redox-active metal center. The unbound form of the organic compound in the second electrolyte solution is the same as the bound organic compound in the first electrolyte solution, or an oxidized or reduced variant thereof. Catechol and substituted catechols can be particularly desirable organic compounds for inclusion in the coordination complex and the second electrolyte solution.
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Citations
24 Claims
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1. A flow battery comprising:
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a first half-cell containing a first electrolyte solution, the first electrolyte solution comprising a coordination complex as a first active material; wherein the coordination complex comprises a redox-active metal center and an organic compound bound to the redox-active metal center; and a second half-cell containing a second electrolyte solution, the second electrolyte solution comprising an unbound form of the organic compound, or a corresponding oxidized or reduced variant thereof, as a second active material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A flow battery comprising:
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a first half-cell containing a first electrolyte solution, the first electrolyte solution comprising a coordination complex as a first active material and the first half-cell being a negative half-cell; wherein the coordination complex comprises a redox-active metal center and an organic compound comprising catechol, a substituted catechol, or any combination thereof bound to the redox-active metal center; and a second half-cell containing a second electrolyte solution, the second electrolyte solution comprising an unbound form of the organic compound, or a corresponding quinone variant thereof, as a second active material and the second half-cell being a positive half-cell. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method comprising:
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providing a first electrolyte solution comprising a coordination complex as a first active material; wherein the coordination complex comprises a redox-active metal center and an organic compound comprising catechol, a substituted catechol, or any combination thereof bound to the redox-active metal center; providing a second electrolyte solution comprising an unbound form of the organic compound, or a corresponding quinone variant thereof, as a second active material; disposing the first electrolyte solution and the second electrolyte solution on opposing sides of a separator in a flow battery; and operating the flow battery by reducing the redox-active metal center of the coordination complex in the first electrolyte solution and oxidizing the catechol or substituted catechol in the second electrolyte solution to the corresponding quinone variant, or oxidizing the redox-active metal center of the coordination complex in the first electrolyte solution and reducing the corresponding quinone variant in the second electrolyte solution to catechol or the substituted catechol. - View Dependent Claims (21, 22, 23, 24)
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Specification