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Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications
Anion-exchange membranes (AEMs) are key components in relatively novel technologies such as alkaline exchange-based membrane fuel cells and AEM-based water electrolyzers. The application of AEMs in these processes is made possible in an alkaline environment, where hydroxide ions (OH(−)) play the rol...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9693448/ https://www.ncbi.nlm.nih.gov/pubmed/36363606 http://dx.doi.org/10.3390/membranes12111051 |
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author | Ouma, Cecil Naphtaly Moro Obodo, Kingsley Onyebuchi Bessarabov, Dmitri |
author_facet | Ouma, Cecil Naphtaly Moro Obodo, Kingsley Onyebuchi Bessarabov, Dmitri |
author_sort | Ouma, Cecil Naphtaly Moro |
collection | PubMed |
description | Anion-exchange membranes (AEMs) are key components in relatively novel technologies such as alkaline exchange-based membrane fuel cells and AEM-based water electrolyzers. The application of AEMs in these processes is made possible in an alkaline environment, where hydroxide ions (OH(−)) play the role of charge carriers in the presence of an electrocatalyst and an AEM acts as an electrical insulator blocking the transport of electrons, thereby preventing circuit break. Thus, a good AEM would allow the selective transport of OH(−) while preventing fuel (e.g., hydrogen, alcohol) crossover. These issues are the subjects of in-depth studies of AEMs—both experimental and theoretical studies—with particular emphasis on the ionic conductivity, ion exchange capacity, fuel crossover, durability, stability, and cell performance properties of AEMs. In this review article, the computational approaches used to investigate the properties of AEMs are discussed. The different modeling length scales are microscopic, mesoscopic, and macroscopic. The microscopic scale entails the ab initio and quantum mechanical modeling of alkaline AEMs. The mesoscopic scale entails using molecular dynamics simulations and other techniques to assess the alkaline electrolyte diffusion in AEMs, OH(−) transport and chemical degradation in AEMs, ion exchange capacity of an AEM, as well as morphological microstructures. This review shows that computational approaches can be used to investigate different properties of AEMs and sheds light on how the different computational domains can be deployed to investigate AEM properties. |
format | Online Article Text |
id | pubmed-9693448 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96934482022-11-26 Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications Ouma, Cecil Naphtaly Moro Obodo, Kingsley Onyebuchi Bessarabov, Dmitri Membranes (Basel) Review Anion-exchange membranes (AEMs) are key components in relatively novel technologies such as alkaline exchange-based membrane fuel cells and AEM-based water electrolyzers. The application of AEMs in these processes is made possible in an alkaline environment, where hydroxide ions (OH(−)) play the role of charge carriers in the presence of an electrocatalyst and an AEM acts as an electrical insulator blocking the transport of electrons, thereby preventing circuit break. Thus, a good AEM would allow the selective transport of OH(−) while preventing fuel (e.g., hydrogen, alcohol) crossover. These issues are the subjects of in-depth studies of AEMs—both experimental and theoretical studies—with particular emphasis on the ionic conductivity, ion exchange capacity, fuel crossover, durability, stability, and cell performance properties of AEMs. In this review article, the computational approaches used to investigate the properties of AEMs are discussed. The different modeling length scales are microscopic, mesoscopic, and macroscopic. The microscopic scale entails the ab initio and quantum mechanical modeling of alkaline AEMs. The mesoscopic scale entails using molecular dynamics simulations and other techniques to assess the alkaline electrolyte diffusion in AEMs, OH(−) transport and chemical degradation in AEMs, ion exchange capacity of an AEM, as well as morphological microstructures. This review shows that computational approaches can be used to investigate different properties of AEMs and sheds light on how the different computational domains can be deployed to investigate AEM properties. MDPI 2022-10-27 /pmc/articles/PMC9693448/ /pubmed/36363606 http://dx.doi.org/10.3390/membranes12111051 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Review Ouma, Cecil Naphtaly Moro Obodo, Kingsley Onyebuchi Bessarabov, Dmitri Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications |
title | Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications |
title_full | Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications |
title_fullStr | Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications |
title_full_unstemmed | Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications |
title_short | Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications |
title_sort | computational approaches to alkaline anion-exchange membranes for fuel cell applications |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9693448/ https://www.ncbi.nlm.nih.gov/pubmed/36363606 http://dx.doi.org/10.3390/membranes12111051 |
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