公开(公告)号：US20230131299A1

公开(公告)日：2023-04-27

申请号：US18088440

申请日：2022-12-23

Applicant: RAYTHEON TECHNOLOGIES CORPORATION

Inventor： James D. Saraidaridis ,  Zhiwei Yang

IPC: H01M8/04186 ,  H01M8/04082 ,  H01M8/0444 ,  H01M8/18

Abstract: A redox flow battery system with a redox flow battery includes a redox flow cell, and a supply/storage system external of the redox flow cell. The supply/storage system includes first and second electrolytes for circulation through the redox flow cell. At least the first electrolyte is a liquid electrolyte that has electrochemically active species with multiple, reversible oxidation states. A secondary cell is fluidly connected with the first electrolyte and is operable to monitor concentration of one or more of the electrochemically active species. The secondary cell includes a counter electrode, a working microelectrode, and an ionically conductive path formed by the first electrolyte between the counter electrode and the working microelectrode.

公开(公告)号：US20220376286A1

公开(公告)日：2022-11-24

申请号：US17326518

申请日：2021-05-21

Applicant: RAYTHEON TECHNOLOGIES CORPORATION

Inventor： Timothy Davenport ,  James D. Saraidaridis ,  Robert Mason Darling

IPC: H01M8/18

Abstract: A redox flow battery includes a redox flow cell and a supply and storage system external of the redox flow cell. The supply and storage system includes first and second electrolytes for circulation through the redox flow cell. The first electrolyte is a liquid electrolyte having electrochemically active manganese species with multiple, reversible oxidation states in the redox flow cell. The electrochemically active manganese species may undergo reactions that cause precipitation of manganese oxide solids. The first electrolyte includes an inhibitor that limits the self-discharge reactions. The inhibitor includes an oxoanion compound.

公开(公告)号：US11664518B2

公开(公告)日：2023-05-30

申请号：US17326518

申请日：2021-05-21

Applicant: RAYTHEON TECHNOLOGIES CORPORATION

Inventor： Timothy Davenport ,  James D. Saraidaridis ,  Robert Mason Darling

IPC: H01M8/18

CPC classification number: H01M8/188 ,  H01M2300/0014

Abstract: A redox flow battery includes a redox flow cell and a supply and storage system external of the redox flow cell. The supply and storage system includes first and second electrolytes for circulation through the redox flow cell. The first electrolyte is a liquid electrolyte having electrochemically active manganese species with multiple, reversible oxidation states in the redox flow cell. The electrochemically active manganese species may undergo reactions that cause precipitation of manganese oxide solids. The first electrolyte includes an inhibitor that limits the self-discharge reactions. The inhibitor includes an oxoanion compound.

公开(公告)号：US11923583B2

公开(公告)日：2024-03-05

申请号：US17521238

申请日：2021-11-08

Applicant: Raytheon Technologies Corporation

Inventor： James D. Saraidaridis ,  Zhiwei Yang

IPC: H01M8/18 ,  H01M8/04119 ,  H01M8/04186

CPC classification number: H01M8/188 ,  H01M8/04186 ,  H01M8/04164

Abstract: In a redox flow battery (RFB), the base solvent of the electrolytes tends to migrate across the barrier layer from one electrode toward the other. This can result in a volume and concentration imbalance between the electrolytes that is detrimental to battery efficiency and capacity. Compatible electrolytes can be mixed to rebalance the system, but for incompatible electrolytes mixing is not a viable option. To this end, the RFB herein includes a separator that recovers base solvent from the vapor phase of one of the electrolytes and returns the recovered base solvent to the other electrolyte to thereby reverse the imbalance.

公开(公告)号：US20230144710A1

公开(公告)日：2023-05-11

申请号：US17521238

申请日：2021-11-08

Applicant: Raytheon Technologies Corporation

Inventor： James D. Saraidaridis ,  Zhiwei Yang

IPC: H01M8/18 ,  H01M8/04186

CPC classification number: H01M8/188 ,  H01M8/04186 ,  H01M8/04164

Abstract: In a redox flow battery (RFB), the base solvent of the electrolytes tends to migrate across the barrier layer from one electrode toward the other. This can result in a volume and concentration imbalance between the electrolytes that is detrimental to battery efficiency and capacity. Compatible electrolytes can be mixed to rebalance the system, but for incompatible electrolytes mixing is not a viable option. To this end, the RFB herein includes a separator that recovers base solvent from the vapor phase of one of the electrolytes and returns the recovered base solvent to the other electrolyte to thereby reverse the imbalance.

公开(公告)号：US20220190364A1

公开(公告)日：2022-06-16

申请号：US17119408

申请日：2020-12-11

Applicant: Raytheon Technologies Corporation

Inventor： James D. Saraidaridis ,  Zhiwei Yang

IPC: H01M8/04186 ,  H01M8/18 ,  H01M8/04082

Abstract: A method for maintaining a redox flow includes draining a first battery electrolyte solution from a redox flow battery cell, the cell including a separator layer arranged between a first electrode and a second electrode, a first circulation loop configured to provide the first battery electrolyte solution to the first electrode and a second circulation loop configured to provide a second battery electrolyte solution to the second electrode; and flowing a non-battery electrolyte solution through the first electrode. The non-battery electrolyte removes at least a portion of the solid precipitates from at least one of the first electrode and the separator layer. The method also includes draining the non-battery electrolyte solution from the cell and returning the first battery electrolyte solution to the cell. A method for a redox flow battery and a redox flow battery are also disclosed.

公开(公告)号：US11271226B1

公开(公告)日：2022-03-08

申请号：US17119427

申请日：2020-12-11

Applicant: Raytheon Technologies Corporation

Inventor： James D. Saraidaridis ,  Michael L. Perry ,  Robert Mason Darling

IPC: H01M8/04186 ,  H01M8/18 ,  H01M8/08 ,  H01M8/04082

Abstract: A method for a redox flow battery includes using a cell of a redox flow battery to store electrical energy and discharge the stored electrical energy. The using includes circulating a first electrolyte solution through a first circulation loop in fluid connection with the first electrode of the cell; circulating a second electrolyte solution through a second circulation loop in fluid connection with the second electrode of the cell; and at least one of a first element from the first electrolyte solution in the first electrode permeates through the separator layer and precipitates as a first solid product in the second electrode and a second element from the second electrolyte solution permeates through the separator layer and precipitates a second solid product in the first electrode. The method also includes removing at least a portion of the first solid product or the second solid product from the first electrode and the second electrode, respectively.