公开(公告)号：WO2022147477A1

公开(公告)日：2022-07-07

申请号：PCT/US2021/073200

申请日：2021-12-30

Applicant: UOP LLC

Inventor： NICHOLLS, Natalie L. ,  KENDER, William T. ,  HELM, Melissa L.

IPC: H01M8/18 ,  H01M8/04186

Abstract: A redox flow battery with an electrochemical balancing cell having first and second chambers. The first chamber includes a catalyst coated substrate and the second chamber includes an electrode. Each receives an electrolyte from the redox flow battery. There is a single interface between the two chambers. The balancing cell reverses parasitic reactions in the first chamber that occur in the redox flow battery. The products of the reversed reactions are carried away from the electrochemical balancing cell and back to the redox flow battery in the electrolyte that carried the reactant to the first chamber. Also, processes for reversing a parasitic reaction in a redox flow battery.

公开(公告)号：WO2023049751A1

公开(公告)日：2023-03-30

申请号：PCT/US2022/076785

申请日：2022-09-21

Applicant: UOP LLC

Inventor： MILLER, Stuart R. ,  DIGIULIO, Christopher D. ,  KENDER, William T.

IPC: H01M8/18 ,  H01M8/04276 ,  H01M8/0444 ,  H01M8/04791

Abstract: A flow battery system with a cathode cell including a first electrode, an anode cell includes a second electrode, and a membrane between the two cells. A first electrolyte tank includes a catholyte. A second electrolyte tank includes an anolyte. The system includes two rebalancing cells. A first rebalancing cell is in fluid communication between the cathode cell and the first electrolyte tank and is configured to reduce active species from the catholyte. The second rebalancing cell is in fluid communication with the first electrolyte tank and the second electrolyte tank such that the first electrolyte tank and the second electrolyte tank are in direct fluid communication. The second rebalancing cell is configured to reduce active species from the catholyte and the reduced catholyte may be combined directly with the anolyte. The second rebalancing cell may be a chemical reactor, a catalytic reactor, or an electrochemical reactor.

公开(公告)号：WO2023049702A1

公开(公告)日：2023-03-30

申请号：PCT/US2022/076715

申请日：2022-09-20

Applicant: UOP LLC

Inventor： KENDER, William T. ,  OSMAN, Zara

IPC: H01M8/18 ,  H01M8/04186 ,  H01M8/04276 ,  H01M8/04791

Abstract: A method of refreshing an asymmetric redox flow battery system is described. The redox flow battery system comprises: at least one rechargeable cell comprising a positive electrolyte, a negative electrolyte, and a separator positioned between the positive electrolyte and the negative electrolyte, the positive electrolyte in contact with a positive electrode, and the negative electrolyte in contact with a negative electrode; the positive electrolyte comprising water and a metal precursor and having a volume; the negative electrolyte comprising water and the metal precursor and having a volume; the negative electrolyte having a concentration of the metal precursor greater than a concentration of the metal precursor in the positive electrolyte. The flow of mixed electrolyte past the negative electrode is prevented, and the negative electrolyte and positive electrolyte are mixed together. The mixed solution is reapportioned to the negative and positive sides based on the initial negative and positive electrolyte volumes. Flow of the refreshed negative electrolyte past the negative electrode is then resumed.

公开(公告)号：WO2023049700A1

公开(公告)日：2023-03-30

申请号：PCT/US2022/076713

申请日：2022-09-20

Applicant: UOP LLC

Inventor： OSMAN, Zara ,  KENDER, William T.

IPC: H01M8/18 ,  H01M8/24

Abstract: A redox flow battery system having decreased cross-over of active species and decreased hydrogen generation, which is particularly important with less expensive polyethylene or polypropylene membranes. The redox flow battery system comprises at least one rechargeable cell comprising a positive electrolyte, a negative electrolyte, and a separator positioned between the positive electrolyte and the negative electrolyte. The positive electrolyte is in contact with a positive electrode, and the negative electrolyte is in contact with a negative electrode. The positive and negative electrolytes comprise water and a metal precursor, and the concentration of the metal precursor in the negative electrolyte is greater than the concentration of the metal precursor in the positive electrolyte. The metal in the metal precursor comprises iron, copper, zinc manganese, titanium, tin, silver, vanadium, or cerium.

公开(公告)号：WO2022140785A1

公开(公告)日：2022-06-30

申请号：PCT/US2021/073079

申请日：2021-12-22

Applicant: UOP LLC

Inventor： KENDER, William T.

IPC: H01M8/18 ,  H01M8/0258

Abstract: A redox flow battery system comprising a catholyte in fluid communication with a cathode, an anolyte in fluid communication with an anode, a membrane in fluid communication with the catholyte and the anolyte, and positive and negative terminals in contact with a power supply and a load. The positive and negative terminals configured to charge the redox flow battery in an opposite direction such that the anolyte is oxidized and the catholyte is reduced. The anolyte and the catholyte are kept separate and never mixed.