Flow battery balancing cells with bipolar membranes for simultaneous regulation of negative and positive electrolyte solutions
A technology of electrolyte solution and flow battery, applied in electrolyte flow processing, aqueous electrolyte, fuel cell, etc.
Active Publication Date: 2021-01-05
LOCKHEED MARTIN ADVANCED ENERGY STORAGE
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Furthermore, since the rate of parasitic reactions is often highly variable, it is sometimes difficult to add an external acid or base at a rate sufficient to maintain the desired pH window in the electrolyte solution
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[0026] The present invention relates, in part, to electrochemically balanced cells that can simultaneously adjust the pH of two electrolyte solutions. The invention also relates, in part, to a flow battery in fluid communication with an electrochemically balanced cell that can simultaneously adjust the pH of two electrolyte solutions. The present invention also relates in part to a method of simultaneously adjusting the pH of two electrolyte solutions using an electrochemical balance cell.
[0027]The invention can be understood more readily by reference to the following description taken in conjunction with the accompanying drawings and examples, all of which form a part hereof. It should be understood that the invention is not limited to the specific products, methods, conditions or parameters described and / or illustrated herein. Furthermore, the terminology used herein is for the purpose of describing particular embodiments by way of example only and is not intended to be ...
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Abstract
Parasitic reactions such as hydrogen production and oxidation by oxygen can occur under the operating conditions of flow batteries and other electrochemical systems. Such parasitic reactions can adversely affect operational performance by altering the pH and / or state of charge of one or both electrolyte solutions in a flow battery. An electrochemically balanced cell rebalances the electrolyte solution. An electrochemically balanced cell adapted to be in fluid communication with two electrolyte solutions of a flow battery may include a first chamber containing a first electrode, a second chamber containing a second electrode, disposed between the first chamber and the second chamber A third chamber, an ion-selective membrane forming a first interface between the first and third chambers, and a bipolar membrane forming a second interface between the second and third chambers.
Description
[0001] Cross References to Related Applications [0002] Pursuant to 35 U.S.C. §119, this application claims priority to U.S. Provisional Patent Application No. 62 / 206,933, filed August 19, 2015, and U.S. Provisional Patent Application No. 62 / 147,034, filed April 14, 2015 , the entire contents of which are incorporated herein by reference. [0003] Statement Regarding Federally Sponsored Research or Development [0004] Not applicable. technical field [0005] The present invention relates broadly to energy storage, and more particularly to electrochemically balanced cells for flow batteries and methods of their use. Background technique [0006] Electrochemical energy storage systems such as batteries, supercapacitors, etc. have been widely used for large-scale energy storage applications. Various battery designs including flow batteries have been considered for this purpose. Compared with other types of electrochemical energy storage systems, flow batteries are advanta...
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IPC IPC(8): H01M8/04298H01M8/18H01M10/42
CPCH01M8/1023H01M8/1039H01M8/04186H01M8/04276H01M8/188Y02E60/50H01M8/0202H01M8/20
Inventor 史蒂文·Y·莉斯约翰·戈尔茨约瑟夫·约翰尼斯·亨里克斯·皮珀斯帕拉瓦斯图·巴迪日纳瑞雅南
Owner LOCKHEED MARTIN ADVANCED ENERGY STORAGE