Modeling Electrochemical and Rheological Characteristics of Suspension-Based Electrodes for Redox Flow Cells
Flowable suspension-based electrodes (FSEs) have gained attention in recent years, as the integration of solid materials into electrochemical flow cells can offer improved performance and flexible operation. However, under conditions that engender favorable electrochemical properties (e.g., high par...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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The Electrochemical Society
2024
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| Online Access: | https://hdl.handle.net/1721.1/157787 |
| _version_ | 1824457926503301120 |
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| author | Majji, Madhu V Neyhouse, Bertrand J Matteucci, Nicholas J Lennon, Kyle R Mallia, Christopher T Fenton Jr., Alexis M Swan, James W Brushett, Fikile R |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Majji, Madhu V Neyhouse, Bertrand J Matteucci, Nicholas J Lennon, Kyle R Mallia, Christopher T Fenton Jr., Alexis M Swan, James W Brushett, Fikile R |
| author_sort | Majji, Madhu V |
| collection | MIT |
| description | Flowable suspension-based electrodes (FSEs) have gained attention in recent years, as the integration of solid materials into electrochemical flow cells can offer improved performance and flexible operation. However, under conditions that engender favorable electrochemical properties (e.g., high particle loading, high conductivity, high surface area), FSEs can exhibit non-Newtonian characteristics that impose large pumping losses and flow-dependent transport rates. These multifaceted trade-offs motivate the use of models to broadly explore scaling relationships and better understand design rules for electrochemical devices. To this end, we present a one-dimensional model, integrating porous electrode theory with FSE rheology as well as flow-dependent electron and mass transport under pressure-driven flow. We study FSE behavior as a function of material properties and operating conditions, identifying key dimensionless groups that describe the underlying physical processes. We assess flow cell performance by quantifying electrode polarization and relative pumping losses, establishing generalized property-performance relationships for FSEs. Importantly, we expound relevant operating regimes—based on a subset of dimensionless groups—that inform practical operating envelopes, ultimately helping to guide FSE and cell engineering for electrochemical systems. |
| first_indexed | 2025-02-19T04:17:45Z |
| format | Article |
| id | mit-1721.1/157787 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2025-02-19T04:17:45Z |
| publishDate | 2024 |
| publisher | The Electrochemical Society |
| record_format | dspace |
| spelling | mit-1721.1/1577872024-12-23T06:00:29Z Modeling Electrochemical and Rheological Characteristics of Suspension-Based Electrodes for Redox Flow Cells Majji, Madhu V Neyhouse, Bertrand J Matteucci, Nicholas J Lennon, Kyle R Mallia, Christopher T Fenton Jr., Alexis M Swan, James W Brushett, Fikile R Massachusetts Institute of Technology. Department of Chemical Engineering Massachusetts Institute of Technology. Department of Materials Science and Engineering Flowable suspension-based electrodes (FSEs) have gained attention in recent years, as the integration of solid materials into electrochemical flow cells can offer improved performance and flexible operation. However, under conditions that engender favorable electrochemical properties (e.g., high particle loading, high conductivity, high surface area), FSEs can exhibit non-Newtonian characteristics that impose large pumping losses and flow-dependent transport rates. These multifaceted trade-offs motivate the use of models to broadly explore scaling relationships and better understand design rules for electrochemical devices. To this end, we present a one-dimensional model, integrating porous electrode theory with FSE rheology as well as flow-dependent electron and mass transport under pressure-driven flow. We study FSE behavior as a function of material properties and operating conditions, identifying key dimensionless groups that describe the underlying physical processes. We assess flow cell performance by quantifying electrode polarization and relative pumping losses, establishing generalized property-performance relationships for FSEs. Importantly, we expound relevant operating regimes—based on a subset of dimensionless groups—that inform practical operating envelopes, ultimately helping to guide FSE and cell engineering for electrochemical systems. 2024-12-06T17:09:45Z 2024-12-06T17:09:45Z 2023-05-01 2024-12-06T17:00:01Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/157787 Madhu V. Majji et al 2023 J. Electrochem. Soc. 170 050532 en 10.1149/1945-7111/accb74 Journal of The Electrochemical Society Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ application/pdf The Electrochemical Society The Electrochemical Society |
| spellingShingle | Majji, Madhu V Neyhouse, Bertrand J Matteucci, Nicholas J Lennon, Kyle R Mallia, Christopher T Fenton Jr., Alexis M Swan, James W Brushett, Fikile R Modeling Electrochemical and Rheological Characteristics of Suspension-Based Electrodes for Redox Flow Cells |
| title | Modeling Electrochemical and Rheological Characteristics of Suspension-Based Electrodes for Redox Flow Cells |
| title_full | Modeling Electrochemical and Rheological Characteristics of Suspension-Based Electrodes for Redox Flow Cells |
| title_fullStr | Modeling Electrochemical and Rheological Characteristics of Suspension-Based Electrodes for Redox Flow Cells |
| title_full_unstemmed | Modeling Electrochemical and Rheological Characteristics of Suspension-Based Electrodes for Redox Flow Cells |
| title_short | Modeling Electrochemical and Rheological Characteristics of Suspension-Based Electrodes for Redox Flow Cells |
| title_sort | modeling electrochemical and rheological characteristics of suspension based electrodes for redox flow cells |
| url | https://hdl.handle.net/1721.1/157787 |
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