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公开(公告)号：US20210305609A1
公开(公告)日：2021-09-30
申请号：US17270623
申请日：2019-10-23
发明人： Zachariah M. NORMAN , Alexander B. PAPANDREW , Steven Y. REECE , Rachel Christine KLET , Matthew MILLARD
IPC分类号： H01M8/06 , H01M8/18 , H01M8/08 , H01M50/497 , H01M50/414 , H01M4/90 , H01M4/86
摘要： The present disclosure provides methods and devices for preparing electrolyte solutions containing unwanted impurities at the pg/L levels. The methods generally comprise electrochemically reducing the impurity to a precipitated, plated, or volatilized form, and removing that reduced form from electrolyte solution. This disclosure describes the methods and devices for effecting such methods, and the electrochemical solutions derived or derivable from such methods.
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52.发明授权公开(公告)号：US10903511B2
公开(公告)日：2021-01-26
申请号：US15364206
申请日：2016-11-29
发明人： Adam Morris-Cohen
IPC分类号： H01M8/04276 , H01M8/04746 , H01M8/04186 , H01M8/04537 , H01M8/18 , H01M8/20
摘要： The circulation rates of the electrolyte solutions in a flow battery can impact operating performance. Adjusting the circulation rates can allow improved performance to be realized. Flow battery systems having adjustable circulation rates can include a first half-cell containing a first electrolyte solution, a second half-cell containing a second electrolyte solution, at least one pump configured to circulate the first electrolyte solution and the second electrolyte solution at adjustable circulation rates through at least one half-cell in response to a value of Pexit/I or I/Penter, and at least one sensor configured to measure net electrical power entering or exiting the flow battery system, and an amount of electrical current passing through the whole cell. I is the electrical power passing through the whole cell. Pexit is net electrical power exiting the system in a discharging mode, and Penter is net electrical power entering the system in a charging mode.
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公开(公告)号：US10833347B2
公开(公告)日：2020-11-10
申请号：US16509157
申请日：2019-07-11
IPC分类号： H01M8/18 , H01M8/0202 , H01M8/04186 , H01M8/04276 , H01M8/20 , H01M8/1023 , H01M8/1039
摘要： Parasitic reactions, such as production of hydrogen and oxidation by oxygen, can occur under the operating conditions of flow batteries and other electrochemical systems. Such parasitic reactions can undesirably impact operating performance by altering the pH and/or state of charge of one or both electrolyte solutions in a flow battery. Electrochemical balancing cells can allow rebalancing of electrolyte solutions to take place. Electrochemical balancing cells suitable for placement in fluid communication with both electrolyte solutions of a flow battery can include: a first chamber containing a first electrode, a second chamber containing a second electrode, a third chamber disposed between the first chamber and the second chamber, an ion-selective membrane forming a first interface between the first chamber and the third chamber, and a bipolar membrane forming a second interface between the second chamber and the third chamber.
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公开(公告)号：US10581103B2
公开(公告)日：2020-03-03
申请号：US15098276
申请日：2016-04-13
发明人： Steven Y. Reece
IPC分类号： H01M8/18 , H01M8/04186 , H01M8/04276 , H01M8/20
摘要： Parasitic reactions, such as production of hydrogen and oxidation by oxygen, can occur under the operating conditions of flow batteries and other electrochemical systems. Such parasitic reactions can undesirably impact operating performance by altering the pH and/or state of charge of one or both electrolyte solutions in a flow battery. Electrochemical balancing cells configured for addressing the effects of parasitic reactions can include: a first chamber containing a first electrode, a second chamber containing a second electrode, a third chamber disposed between the first chamber and the second chamber, an ion-selective membrane forming a first interface between the first chamber and the third chamber, and a bipolar membrane forming a second interface between the second chamber and the third chamber. Such electrochemical balancing cells can be placed in fluid communication with at least one half-cell of a flow battery.
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公开(公告)号：US10573899B2
公开(公告)日：2020-02-25
申请号：US15297071
申请日：2016-10-18
摘要： Electrochemical cells, such as those present within flow batteries, can include at least one electrode with one face being more hydrophilic than is the other. Such electrodes can lessen the incidence of parasitic reactions by directing convective electrolyte circulation toward a separator in the electrochemical cell. Flow batteries containing the electrochemical cells can include: a first half-cell containing a first electrode with a first face and a second face that are directionally opposite one another, a second half-cell containing a second electrode with a first face and a second face that are directionally opposite one another, and a separator disposed between the first half-cell and the second half-cell. The first face of both the first and second electrodes is disposed adjacent to the separator. The first face of at least one of the first electrode and the second electrode is more hydrophilic than is the second face.
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56.发明授权公开(公告)号：US10388978B2
公开(公告)日：2019-08-20
申请号：US15027228
申请日：2014-11-06
发明人： Adam Morris-Cohen , Kean Duffey , Peter F. Hays , Sophia Lee
IPC分类号： H01M8/18 , H01M8/04537 , G01N27/30 , G01N27/416 , H01M8/04186 , H01M8/20 , H02J7/00
摘要： The invention concerns methods of determining the state of charge of a half-cell within a redox flow battery, the method comprising: (i) measuring the rate of change in equilibrium half-cell reduction potential of the electrolyte as charge is passed into the electrolyte solution within the cell; and (ii) correlating said rate of change in equilibrium half-cell reduction potential with the state of charge of said half-cell. Other aspects of the invention concern balancing the state of charge of a flow battery and methods of calibrating an oxidation/reduction probe.
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公开(公告)号：US10381674B2
公开(公告)日：2019-08-13
申请号：US15093598
申请日：2016-04-07
IPC分类号： H01M8/2404 , H01M8/0286 , H01M8/2465 , H01M8/0273 , H01M8/18 , H01M8/20 , H01M4/86
摘要： Flow batteries can be constructed by combining multiple electrochemical unit cells together with one another in a cell stack. High-throughput processes for fabricating electrochemical unit cells can include providing materials from rolled sources for forming a soft goods assembly and a hard goods assembly, supplying the materials to a production line, and forming an electrochemical unit cell having a bipolar plate disposed on opposite sides of a separator. The electrochemical unit cells can have configurations such that bipolar plates are shared between adjacent electrochemical unit cells in a cell stack, or such that bipolar plates between adjacent electrochemical unit cells are abutted together with one another in a cell stack.
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公开(公告)号：US10347925B2
公开(公告)日：2019-07-09
申请号：US15143344
申请日：2016-04-29
IPC分类号： H01M8/04186 , H01M8/18 , H01M8/08 , H01M8/1053 , H01M8/1067 , H01M4/90 , H01M8/1018
摘要： Parasitic reactions, such as evolution of hydrogen at the negative electrode, can occur under the operating conditions of flow batteries and other electrochemical systems. Such parasitic reactions can undesirably impact operating performance by altering the pH and/or state of charge of one or both electrolyte solutions in a flow battery. Electrochemical balancing cells can allow adjustment of electrolyte solutions to take place. Electrochemical balancing cells suitable for placement in fluid communication with both electrolyte solutions of a flow battery can include: a first chamber containing a first electrode, a second chamber containing a second electrode, a third chamber disposed between the first chamber and the second chamber, a cation-selective membrane forming a first interface between the first chamber and the third chamber, and a bipolar membrane, a cation-selective membrane, or a membrane electrode assembly forming a second interface between the second chamber and the third chamber.
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公开(公告)号：US10153502B2
公开(公告)日：2018-12-11
申请号：US14963147
申请日：2015-12-08
IPC分类号： H01M8/18 , G01R31/36 , G01N21/552 , H01M8/0444 , H01M8/04537 , G01N21/85
摘要： State of charge determination within electrochemical systems, such as flow batteries, can often be difficult to measure, particularly in an in situ manner. Methods for assaying the condition of an electrochemical system can include: interacting electromagnetic radiation with a first electrolyte solution at a location within the electrochemical system, the electromagnetic radiation being delivered through an optical material configured to exhibit attenuated total reflectance at an interface between the optical material and the first electrolyte solution; receiving at a detector electromagnetic radiation that has interacted with the first electrolyte solution via one or more attenuated total reflectances within the optical material; and measuring an absorbance of at least one of an oxidized form or a reduced form of a first coordination compound within the first electrolyte solution via the electromagnetic radiation that is received at the detector.
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公开(公告)号：US20240332580A1
公开(公告)日：2024-10-03
申请号：US18738459
申请日：2024-06-10
发明人： Zachariah M. NORMAN , Alexander B. PAPANDREW , Steven Y. REECE , Rachel Christine KLET , Matthew MILLARD
IPC分类号： H01M8/06 , H01M4/86 , H01M4/90 , H01M8/08 , H01M8/18 , H01M50/414 , H01M50/497
CPC分类号： H01M8/0693 , H01M4/8605 , H01M4/9016 , H01M4/9041 , H01M8/08 , H01M8/188 , H01M50/414 , H01M50/497 , H01M4/8657 , H01M2300/0002
摘要： The present disclosure provides methods and devices for preparing electrolyte solutions containing unwanted impurities at the μg/L levels. The methods generally comprise electrochemically reducing the impurity to a precipitated, plated, or volatilized form, and removing that reduced form from electrolyte solution. This disclosure describes the methods and devices for effecting such methods, and the electrochemical solutions derived or derivable from such methods.
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