Water-mediated ion transport in an anion exchange membrane
Abstract Water is a critical component in polyelectrolyte anion exchange membranes (AEMs). It plays a central role in ion transport in electrochemical systems. Gaining a better understanding of molecular transport and conductivity in AEMs has been challenged by the lack of a general methodology capa...
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Nature Portfolio
2025-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-55621-z |
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| author | Zhongyang Wang Ge Sun Nicholas H. C. Lewis Mrinmay Mandal Abhishek Sharma Mincheol Kim Joan M. Montes de Oca Kai Wang Aaron Taggart Alex B. Martinson Paul A. Kohl Andrei Tokmakoff Shrayesh N. Patel Paul F. Nealey Juan J. de Pablo |
| author_facet | Zhongyang Wang Ge Sun Nicholas H. C. Lewis Mrinmay Mandal Abhishek Sharma Mincheol Kim Joan M. Montes de Oca Kai Wang Aaron Taggart Alex B. Martinson Paul A. Kohl Andrei Tokmakoff Shrayesh N. Patel Paul F. Nealey Juan J. de Pablo |
| author_sort | Zhongyang Wang |
| collection | DOAJ |
| description | Abstract Water is a critical component in polyelectrolyte anion exchange membranes (AEMs). It plays a central role in ion transport in electrochemical systems. Gaining a better understanding of molecular transport and conductivity in AEMs has been challenged by the lack of a general methodology capable of capturing and connecting water dynamics, water structure, and ionic transport over time and length scales ranging from those associated with individual bond vibrations and molecular reorientations to those pertaining to macroscopic AEM performance. In this work, we use two-dimensional infrared spectroscopy and semiclassical simulations to examine how water molecules are arranged into successive solvation shells, and we explain how that structure influences the dynamics of bromide ion transport processes in polynorbornene-based materials. We find that the transition to the faster transport mechanism occurs when the reorientation of water molecules in the second solvation shell is fast, allowing a robust hydrogen bond network to form. Our findings provide molecular-level insights into AEMs with inherent transport of halide ions, and help pave the way towards a comprehensive understanding of hydroxide ion transport in AEMs. |
| format | Article |
| id | doaj-art-9d8272ea33da4e5090e4ab1e755956b8 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-9d8272ea33da4e5090e4ab1e755956b82025-02-02T12:32:00ZengNature PortfolioNature Communications2041-17232025-01-0116111010.1038/s41467-024-55621-zWater-mediated ion transport in an anion exchange membraneZhongyang Wang0Ge Sun1Nicholas H. C. Lewis2Mrinmay Mandal3Abhishek Sharma4Mincheol Kim5Joan M. Montes de Oca6Kai Wang7Aaron Taggart8Alex B. Martinson9Paul A. Kohl10Andrei Tokmakoff11Shrayesh N. Patel12Paul F. Nealey13Juan J. de Pablo14Pritzker School of Molecular Engineering, University of ChicagoPritzker School of Molecular Engineering, University of ChicagoDepartment of Chemistry, James Franck Institute, The University of ChicagoSchool of Chemical and Biomolecular Engineering, Georgia Institute of TechnologyPritzker School of Molecular Engineering, University of ChicagoPritzker School of Molecular Engineering, University of ChicagoPritzker School of Molecular Engineering, University of ChicagoPritzker School of Molecular Engineering, University of ChicagoMaterials Science Division, Argonne National LaboratoryMaterials Science Division, Argonne National LaboratorySchool of Chemical and Biomolecular Engineering, Georgia Institute of TechnologyDepartment of Chemistry, James Franck Institute, The University of ChicagoPritzker School of Molecular Engineering, University of ChicagoPritzker School of Molecular Engineering, University of ChicagoPritzker School of Molecular Engineering, University of ChicagoAbstract Water is a critical component in polyelectrolyte anion exchange membranes (AEMs). It plays a central role in ion transport in electrochemical systems. Gaining a better understanding of molecular transport and conductivity in AEMs has been challenged by the lack of a general methodology capable of capturing and connecting water dynamics, water structure, and ionic transport over time and length scales ranging from those associated with individual bond vibrations and molecular reorientations to those pertaining to macroscopic AEM performance. In this work, we use two-dimensional infrared spectroscopy and semiclassical simulations to examine how water molecules are arranged into successive solvation shells, and we explain how that structure influences the dynamics of bromide ion transport processes in polynorbornene-based materials. We find that the transition to the faster transport mechanism occurs when the reorientation of water molecules in the second solvation shell is fast, allowing a robust hydrogen bond network to form. Our findings provide molecular-level insights into AEMs with inherent transport of halide ions, and help pave the way towards a comprehensive understanding of hydroxide ion transport in AEMs.https://doi.org/10.1038/s41467-024-55621-z |
| spellingShingle | Zhongyang Wang Ge Sun Nicholas H. C. Lewis Mrinmay Mandal Abhishek Sharma Mincheol Kim Joan M. Montes de Oca Kai Wang Aaron Taggart Alex B. Martinson Paul A. Kohl Andrei Tokmakoff Shrayesh N. Patel Paul F. Nealey Juan J. de Pablo Water-mediated ion transport in an anion exchange membrane Nature Communications |
| title | Water-mediated ion transport in an anion exchange membrane |
| title_full | Water-mediated ion transport in an anion exchange membrane |
| title_fullStr | Water-mediated ion transport in an anion exchange membrane |
| title_full_unstemmed | Water-mediated ion transport in an anion exchange membrane |
| title_short | Water-mediated ion transport in an anion exchange membrane |
| title_sort | water mediated ion transport in an anion exchange membrane |
| url | https://doi.org/10.1038/s41467-024-55621-z |
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