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    Electrolytes for iron flow battery
    21.
    发明授权
    Electrolytes for iron flow battery 有权

    公开(公告)号：US10586996B2

    公开(公告)日：2020-03-10

    申请号：US15436593

    申请日：2017-02-17

    Applicant: ESS TECH, INC.

    Inventor： Craig E. Evans ,  Yang Song

    IPC: H01M8/18 ,  H01M8/04186 ,  H01M8/04791 ,  H01M8/04701 ,  H01M8/20

    Abstract: A method of operating an iron redox flow battery system may comprise fluidly coupling a plating electrode of an iron redox flow battery cell to a plating electrolyte; fluidly coupling a redox electrode of the iron redox flow battery cell to a redox electrolyte; fluidly coupling a ductile plating additive to one or both of the plating electrolyte and the redox electrolyte; and increasing an amount of the ductile plating additive to the plating electrolyte in response to an increase in the plating stress at the plating electrode. In this way, ductile Fe can be plated on the negative electrode, and the performance, reliability and efficiency of the iron redox flow battery can be maintained. In addition, iron can be more rapidly produced and plated at the plating electrode, thereby achieving a higher charging rate for all iron flow batteries.

    ALTERNATIVE LOW COST ELECTRODES FOR HYBRID FLOW BATTERIES
    23.
    发明申请
    ALTERNATIVE LOW COST ELECTRODES FOR HYBRID FLOW BATTERIES 审中-公开

    公开(公告)号：US20170256803A1

    公开(公告)日：2017-09-07

    申请号：US15601560

    申请日：2017-05-22

    Applicant: ESS TECH, INC.

    Inventor： Craig E. Evans ,  Sean Casey ,  Yang Song

    IPC: H01M8/0258 ,  H01M8/18

    CPC classification number: H01M8/0258 ,  H01M4/8803 ,  H01M4/8817 ,  H01M4/8828 ,  H01M8/0239 ,  H01M8/0245 ,  H01M8/188 ,  H01M8/20 ,  Y02E60/528

    Abstract: 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.

    METHOD AND SYSTEM FOR REBALANCING ELECTROLYTES IN A REDOX FLOW BATTERY SYSTEM
    24.
    发明申请
    METHOD AND SYSTEM FOR REBALANCING ELECTROLYTES IN A REDOX FLOW BATTERY SYSTEM 有权
    在REDOX流量电池系统中重新分配电解质的方法和系统

    公开(公告)号：US20170040630A1

    公开(公告)日：2017-02-09

    申请号：US15297011

    申请日：2016-10-18

    Applicant: ESS TECH, INC.

    Inventor： Yang Song ,  Craig E. Evans

    IPC: H01M8/06 ,  H01M8/18 ,  H01M8/20

    CPC classification number: H01M8/0693 ,  H01M8/188 ,  H01M8/20 ,  Y02E60/528

    Abstract: A redox flow battery system is provided. The system includes a positive electrode in fluid communication with a positive electrolyte comprising a first metal ion and a negative electrode in fluid communication with a negative electrolyte comprising a second metal ion. An electrically insulating ion conducting surface is provided separating the positive electrode from the negative electrode. Further, the system includes a catalyst surface in fluid communication with the first metal ion, the second metal ion, or a combination thereof, and hydrogen gas, wherein the hydrogen gas and the first metal ion, the second metal ion, or a combination thereof are fluidly contacted at the catalyst surface.

    Abstract translation: 提供氧化还原液流电池系统。 该系统包括与包含与包含第二金属离子的负电解质流体连通的第一金属离子和负极的正电解质流体连通的正电极。 提供了将正极与负极分离的电绝缘离子传导表面。 此外，该系统包括与第一金属离子，第二金属离子或其组合流体连通的催化剂表面和氢气，其中氢气和第一金属离子，第二金属离子或其组合 在催化剂表面流体接触。

    METHOD AND SYSTEM FOR REBALANCING ELECTROLYTES IN A REDOX FLOW BATTERY SYSTEM
    25.
    发明申请
    METHOD AND SYSTEM FOR REBALANCING ELECTROLYTES IN A REDOX FLOW BATTERY SYSTEM 审中-公开
    在REDOX流量电池系统中重新分配电解质的方法和系统

    公开(公告)号：US20160293992A1

    公开(公告)日：2016-10-06

    申请号：US15182543

    申请日：2016-06-14

    Applicant: ESS TECH, INC.

    Inventor： Yang Song ,  Craig E. Evans

    IPC: H01M8/18 ,  H01M8/06 ,  H01M8/00 ,  H01M8/20

    CPC classification number: H01M8/188 ,  H01M8/004 ,  H01M8/20 ,  Y02E60/528

    Abstract: 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.

    Abstract translation: 在氧化还原液流电池系统中重新平衡电解质的方法包括将在氧化还原液流电池系统的负极侧产生的氢气引导到催化剂表面，并且在催化剂表面处将氢气与包含金属离子的电解液流体接触，其中 金属离子被催化剂表面的氢气化学还原，并且电解质的电荷状态和电解液的pH保持基本平衡。

    Hybrid redox fuel cell system
    28.
    发明授权
    Hybrid redox fuel cell system 有权

    公开(公告)号：US12087984B2

    公开(公告)日：2024-09-10

    申请号：US17929627

    申请日：2022-09-02

    Applicant: ESS TECH, INC.

    Inventor： Yang Song ,  Craig Evans

    IPC: H01M8/00 ,  H01M4/90 ,  H01M8/06 ,  H01M8/18

    CPC classification number: H01M8/188 ,  H01M4/9016 ,  H01M8/0693

    Abstract: A hybrid redox fuel cell system includes a hybrid redox fuel cell and an electrochemical cell. The hybrid redox fuel cell includes an anode side through which hydrogen is flowed and a cathode side through which liquid electrolyte is flowed, the liquid electrolyte including a metal ion at a higher oxidation state and the metal ion at a lower oxidation state. An anode side of the electrochemical cell is fluidly connected to the cathode side of the hybrid redox fuel cell. At the hybrid redox fuel cell, power is generated by reducing the metal ion at the higher oxidation state to the lower oxidation state at the cathode side while oxidizing the reductant at the anode side. At the anode side of the electrochemical cell, the metal ion at the lower oxidation state is oxidized to the higher oxidation state while the power is generated.

    HYBRID REDOX FUEL CELL SYSTEM
    29.
    发明公开
    HYBRID REDOX FUEL CELL SYSTEM 审中-公开

    公开(公告)号：US20240282995A1

    公开(公告)日：2024-08-22

    申请号：US18641100

    申请日：2024-04-19

    Applicant: ESS TECH, INC.

    Inventor： Yang Song ,  Craig Evans

    IPC: H01M8/18 ,  H01M8/04186

    CPC classification number: H01M8/188 ,  H01M8/04194

    Abstract: A hybrid redox fuel cell system includes a hybrid redox fuel cell including an anode side through which a reductant is flowed and a cathode side through which liquid electrolyte is flowed, and a catalyst bed fluidly connected to the cathode side of the hybrid redox fuel cell, the catalyst bed including a substrate layer and a catalyst layer spiral wound into a jelly roll structure. Furthermore, the liquid electrolyte includes a metal ion at a higher oxidation state and the metal ion at a lower oxidation state, and power is generated at the hybrid redox fuel cell by way of reducing the metal ion from the higher oxidation state to the lower oxidation state at the cathode side while oxidizing the reductant at the anode side.

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