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公开(公告)号：US12132241B2
公开(公告)日：2024-10-29
申请号：US18505880
申请日：2023-11-09
申请人： ESS TECH, INC.
发明人： Yang Song , Craig E. Evans
CPC分类号： H01M8/188 , H01M8/004 , H01M8/0693 , H01M8/20 , Y02E60/50
摘要： A method of rebalancing electrolytes in a redox flow battery system comprises directing hydrogen gas generated on the negative side of the redox flow battery system to a catalyst surface, and fluidly contacting the hydrogen gas with an electrolyte comprising a metal ion at the catalyst surface, wherein the metal ion is chemically reduced by the hydrogen gas at the catalyst surface, and a state of charge of the electrolyte and pH of the electrolyte remain substantially balanced.
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公开(公告)号：US20240079625A1
公开(公告)日：2024-03-07
申请号：US18505880
申请日：2023-11-09
申请人： ESS TECH, INC.
发明人： Yang Song , Craig E. Evans
CPC分类号： H01M8/188 , H01M8/004 , H01M8/0693 , H01M8/20 , Y02E60/50
摘要： A method of rebalancing electrolytes in a redox flow battery system comprises directing hydrogen gas generated on the negative side of the redox flow battery system to a catalyst surface, and fluidly contacting the hydrogen gas with an electrolyte comprising a metal ion at the catalyst surface, wherein the metal ion is chemically reduced by the hydrogen gas at the catalyst surface, and a state of charge of the electrolyte and pH of the electrolyte remain substantially balanced.
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公开(公告)号：US11909077B2
公开(公告)日：2024-02-20
申请号：US17727183
申请日：2022-04-22
IPC分类号： H01M8/0234 , H01M8/0206 , H01M8/0215 , H01M8/0221 , B60L50/64 , H01M8/18 , H01M8/20 , H01M8/0228
CPC分类号： H01M8/0234 , B60L50/64 , H01M8/0206 , H01M8/0215 , H01M8/0221 , H01M8/0228 , H01M8/188 , H01M8/20 , Y02E60/50 , Y02T10/70
摘要： Redox flow devices are described including a positive electrode current collector, a negative electrode current collector, and an ion-permeable membrane separating said positive and negative current collectors, positioned and arranged to define a positive electroactive zone and a negative electroactive zone; wherein at least one of said positive and negative electroactive zone comprises a flowable semi-solid composition comprising ion storage compound particles capable of taking up or releasing said ions during operation of the cell, and wherein the ion storage compound particles have a polydisperse size distribution in which the finest particles present in at least 5 vol % of the total volume, is at least a factor of 5 smaller than the largest particles present in at least 5 vol % of the total volume.
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公开(公告)号：US11855312B2
公开(公告)日：2023-12-26
申请号：US17653620
申请日：2022-03-04
申请人： ESS TECH, INC.
发明人： Craig E. Evans , Sean Casey , Yang Song
IPC分类号： H01M8/0258 , H01M8/18 , H01M8/0239 , H01M4/88 , H01M8/20 , H01M8/0245
CPC分类号： H01M8/0258 , H01M4/8803 , H01M4/8817 , H01M4/8828 , H01M8/0239 , H01M8/0245 , H01M8/188 , H01M8/20 , Y02E60/50
摘要： A redox flow battery may include: a membrane interposed between a first electrode positioned at a first side of the membrane and a second electrode positioned at a second side of the membrane opposite to the first side; a first flow field plate comprising a plurality of positive flow field ribs, each of the plurality of positive flow field ribs contacting the first electrode at first supporting regions on the first side; and the second electrode, including an electrode spacer positioned between the membrane and a second flow field plate, the electrode spacer comprising a plurality of main ribs, each of the plurality of main ribs contacting the second flow field plate at second supporting regions on the second side, each of the second supporting regions aligned opposite to one of the plurality of first supporting regions. As such, a current density distribution at a plating surface may be reduced.
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公开(公告)号：US11831054B2
公开(公告)日：2023-11-28
申请号：US14888099
申请日：2013-05-03
IPC分类号： H01M8/18 , H01M8/20 , H01M8/04 , H01M8/04791 , H01M8/04313 , H01M8/04694 , H01M8/0444
CPC分类号： H01M8/04798 , H01M8/0444 , H01M8/04313 , H01M8/04694 , H01M8/188 , H01M8/20 , H01M2220/10 , Y02E60/50
摘要： A method of maintaining health of a flow battery includes determining an average oxidation state of a common electrochemically active elemental specie in first and second fluid electrolytes on, respectively, a positive side and a negative side of an electrochemical cell of a flow battery, and adjusting the average oxidation state in response to the average oxidation state deviating from a predefined average oxidation state value.
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公开(公告)号：US20230076847A1
公开(公告)日：2023-03-09
申请号：US17929863
申请日：2022-09-06
IPC分类号： H01M8/026 , H01M8/0263 , H01M8/0223 , H01M8/20 , H01M8/0258
摘要： The present inventions are directed to fluid flow assemblies, and systems incorporating such assemblies, each assembly comprising a conductive element disposed within a non-conductive element; the non-conductive element being characterized as framing the conductive central element and the elements together defining a substantially planar surface when engaged with one another; each of the conductive and non-conductive elements comprising channels which, when taken together, form a flow pattern on the substantially planar surface; and wherein the channels are restricted, terminated, or both restricted and terminated in the non-conductive element.
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公开(公告)号：US11600838B2
公开(公告)日：2023-03-07
申请号：US17391508
申请日：2021-08-02
发明人： Cy Fujimoto , Ehren Baca
IPC分类号： H01M8/20 , H01M8/1004
摘要： A fluoro sulfonated poly(phenylene) was rationally designed with an external hydrophobic shell and internal hydrophilic core in order to improve the durability and ion selectivity of a hydrocarbon membrane for vanadium redox flow batteries (VRFBs). The polymer was designed to prevent hydrophilic polymer chain aggregation by attaching acid moieties onto the polymer backbone, while functionalizing the external polymer shell with hydrophobic side chains to prevent excessive vanadium crossover associated with cation exchange membranes. As an example, the hydrophobic shell can be provided by pentafluorobenzoyl group functionalization of the pendent aryl groups on a Diels Alder poly(phenylene) backbone, while the internal polymer chain can contain sulfonic acid moieties to impart hydrophilic character.
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公开(公告)号：US20230028170A1
公开(公告)日：2023-01-26
申请号：US17937391
申请日：2022-09-30
申请人： ESS TECH, INC.
发明人： Yang Song , Craig E. Evans
摘要： A method of rebalancing electrolytes in a redox flow battery system comprises directing hydrogen gas generated on the negative side of the redox flow battery system to a catalyst surface, and fluidly contacting the hydrogen gas with an electrolyte comprising a metal ion at the catalyst surface, wherein the metal ion is chemically reduced by the hydrogen gas at the catalyst surface, and a state of charge of the electrolyte and pH of the electrolyte remain substantially balanced.
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公开(公告)号：US20220263104A1
公开(公告)日：2022-08-18
申请号：US17727183
申请日：2022-04-22
IPC分类号： H01M8/0234 , H01M8/0206 , H01M8/0215 , H01M8/0221 , H01M8/0228 , B60L50/64 , H01M8/18 , H01M8/20
摘要： Redox flow devices are described including a positive electrode current collector, a negative electrode current collector, and an ion-permeable membrane separating said positive and negative current collectors, positioned and arranged to define a positive electroactive zone and a negative electroactive zone; wherein at least one of said positive and negative electroactive zone comprises a flowable semi-solid composition comprising ion storage compound particles capable of taking up or releasing said ions during operation of the cell, and wherein the ion storage compound particles have a polydisperse size distribution in which the finest particles present in at least 5 vol % of the total volume, is at least a factor of 5 smaller than the largest particles present in at least 5 vol % of the total volume.
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公开(公告)号：US20220255107A1
公开(公告)日：2022-08-11
申请号：US17727904
申请日：2022-04-25
发明人： Arthur J. Esswein , John Goeltz , Desiree Amadeo
摘要： Stable solutions comprising high concentrations of charged coordination complexes, including iron hexacyanides are described, as are methods of preparing and using same in chemical energy storage systems, including flow battery systems. The use of these compositions allows energy storage densities at levels unavailable by other iron hexacyanide systems.
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