Increasing reactant utilization in Fe/V flow batteries
US-11901598-B2 · Feb 13, 2024 · US
Manufacturing mixed Fe/V electrolytes for flow batteries
US12388104B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12388104-B2 |
| Application number | US-202217671948-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 15, 2022 |
| Priority date | Feb 15, 2022 |
| Publication date | Aug 12, 2025 |
| Grant date | Aug 12, 2025 |
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Abstract
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An electrolyte, a method for making the electrolyte, and a flow cell battery are provided. The electrolyte includes about 1.0 molar (M) to about 1.5 M iron ions and about 1.0 M to about 1.5 M vanadium ions.
First claim
Opening claim text (preview).
What is claimed is: 1. A mixed ion electrolyte solution for use in a flow cell battery, comprising, as prepared and prior to use in the flow cell battery: a base solution comprising hydrochloric acid; 1.25 molar (M) iron (Fe) ions; 1.25 M vanadium (V) ions having an average charge of about 3.5+; 6.6 M chloride (Cl − ) ions; and 0.8 M sulfate (SO 4 2− ) ions, wherein the flow cell battery is operated at temperatures 40° C. and higher. 2. The mixed ion electrolyte solution of claim 1 , wherein the mixed ion electrolyte solution is a catholyte for the flow cell battery. 3. The mixed ion electrolyte solution of claim 1 , wherein the mixed ion electrolyte solution is an anolyte for the flow cell battery. 4. The mixed ion electrolyte solution of claim 1 , wherein the V ions comprises about 50% V 4+ ions and 50% V 3+ ions. 5. A method for preparing a mixed ion electrolyte solution for use in a flow cell battery, comprising: heating an acid solution comprising a first vanadium salt comprising vanadium (III) oxide (V 2 O 3 ) and a second vanadium salt comprising vanadium (V) oxide (V 2 O 5 ) to dissolve said first and second vanadium salts, the acid solution comprising hydrochloric acid; and dissolving an iron salt comprising iron (II) chloride (FeCl 2 ) in the acid solution, wherein the mixed ion electrolyte solution comprises: 1.25 molar (M) iron (Fe) ions; 1.25 M vanadium (V) ions having an average charge of about 3.5 + ; 6.6 M chloride (Cl − ) ions; and 0.8 M sulfate (SO 4 2− ) ions, wherein the flow cell battery is operated at temperatures 40° C. and higher, and the mixed ion electrolyte solution has the above composition as prepared and prior to use in the flow cell battery. 6. The method of claim 5 , wherein the acid solution is heated at a temperature of about 60° C. 7. The method of claim 5 , wherein the acid solution is heated for about 12 hours.
Assignees
Inventors
Classifications
Acid electrolytes · CPC title
- H01M8/188Primary
by recharging of redox couples containing fluids; Redox flow type batteries · CPC title
Sulfuric acid-based · CPC title
Fuel cells with aqueous electrolytes · CPC title
characterised by the choice for a specific material, e.g. carbon, hydride, absorbent · CPC title
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Frequently asked questions
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- What does patent US12388104B2 cover?
- An electrolyte, a method for making the electrolyte, and a flow cell battery are provided. The electrolyte includes about 1.0 molar (M) to about 1.5 M iron ions and about 1.0 M to about 1.5 M vanadium ions.
- Who is the assignee on this patent?
- Saudi Arabian Oil Co
- What technology area does this patent fall under?
- Primary CPC classification H01M8/188. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 12 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).