公开(公告)号：US11764369B2

公开(公告)日：2023-09-19

申请号：US17650513

申请日：2022-02-09

Applicant: ESS Tech, Inc.

Inventor： Yang Song ,  Yan Wu ,  Brady Thompson

IPC: H01M8/0247 ,  H01M8/0228 ,  H01M8/18

CPC classification number: H01M8/0247 ,  H01M8/0228 ,  H01M8/188

Abstract: Systems and methods are provided for electrochemical and/or chemical pretreatment of bipolar plates, for example, for plating electrodes in redox flow batteries. In one example, a method may include pretreating a bipolar plate for the redox flow battery by disrupting a surface of the bipolar plate. In some examples, pretreating the bipolar plate may include positioning the bipolar plate within the redox flow battery, and thereafter charging the redox flow battery at multiple discrete plating current densities for each of one or more initial charging cycles to electrochemically etch the surface. In additional or alternative examples, pretreating the bipolar plate may include soaking the bipolar plate in solution to chemically treat the surface. In this way, the bipolar plate may be pretreated via electrochemical etching and/or chemical treatment so as to reduce electrochemical performance losses and dendrite formation in the redox flow battery.

公开(公告)号：US20230378482A1

公开(公告)日：2023-11-23

申请号：US18363576

申请日：2023-08-01

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Yan Wu ,  Brady Thompson

IPC: H01M8/0247 ,  H01M8/0228 ,  H01M8/18

CPC classification number: H01M8/0247 ,  H01M8/0228 ,  H01M8/188

Abstract: Systems and methods are provided for electrochemical and/or chemical pretreatment of bipolar plates, for example, for plating electrodes in redox flow batteries. In one example, a method may include pretreating a bipolar plate for the redox flow battery by disrupting a surface of the bipolar plate. In some examples, pretreating the bipolar plate may include positioning the bipolar plate within the redox flow battery, and thereafter charging the redox flow battery at multiple discrete plating current densities for each of one or more initial charging cycles to electrochemically etch the surface. In additional or alternative examples, pretreating the bipolar plate may include soaking the bipolar plate in solution to chemically treat the surface. In this way, the bipolar plate may be pretreated via electrochemical etching and/or chemical treatment so as to reduce electrochemical performance losses and dendrite formation in the redox flow battery.

公开(公告)号：US20240387848A1

公开(公告)日：2024-11-21

申请号：US18612325

申请日：2024-03-21

Applicant: ESS TECH, INC.

Inventor： Yan Wu ,  Karana Dunn ,  Yang Song

IPC: H01M8/1039 ,  H01M8/04186 ,  H01M8/10 ,  H01M8/106 ,  H01M8/18

Abstract: Membranes for flow battery cells are provided herein. In one example, a membrane for a flow battery system includes a microporous substrate having a first surface and a second surface, opposite the first surface, and a coating of ion-conducting polymer on the first surface and the second surface, wherein one or more pores of the microporous substrate are at least partially filled with the ion-conducting polymer.

公开(公告)号：US20220278340A1

公开(公告)日：2022-09-01

申请号：US17650513

申请日：2022-02-09

Applicant: ESS Tech, Inc.

Inventor： Yang Song ,  Yan Wu ,  Brady Thompson

IPC: H01M8/0247 ,  H01M8/18 ,  H01M8/0228

Abstract: Systems and methods are provided for electrochemical and/or chemical pretreatment of bipolar plates, for example, for plating electrodes in redox flow batteries. In one example, a method may include pretreating a bipolar plate for the redox flow battery by disrupting a surface of the bipolar plate. In some examples, pretreating the bipolar plate may include positioning the bipolar plate within the redox flow battery, and thereafter charging the redox flow battery at multiple discrete plating current densities for each of one or more initial charging cycles to electrochemically etch the surface. In additional or alternative examples, pretreating the bipolar plate may include soaking the bipolar plate in solution to chemically treat the surface. In this way, the bipolar plate may be pretreated via electrochemical etching and/or chemical treatment so as to reduce electrochemical performance losses and dendrite formation in the redox flow battery.