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Membranes
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Anion Exchange Membrane Fuel Cells (AEMFCs)
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Anion Exchange Membrane Fuel Cells (AEMFCs)

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".

Deadline for manuscript submissions: closed (10 June 2023) | Viewed by 5441

Special Issue Editors

Dr. Chih-Liang Wang

E-Mail Website
Guest Editor
Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung, Taiwan
Interests: thin-film solar cells; energy materials and devices; surface coating technologies
Prof. Dr. Hsiharng Yang

E-Mail Website
Guest Editor
Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung 402, Taiwan
Interests: AEM fuel cell; electrolyzer; gas diffusion electrode; bio-fuel cell; enzyme immobilization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Hydrogen-based electrochemical energy conversion provdes an altnative for the transformation of global energy production from fossil fuels to renewable energy technonlgies. Anion exchange membrane fuel cells (AEMFCs), membrane-based fuel cells based on the transport of alkaline anions, have drawn much attention recently due to the cost-effectivenss of non-platinum-group metal (non-PGM) electrocatalysts enabling sluggish oxygen reduction reaction (ORR) compared to proton exchange membrane fuel cells (PEMFCs) and the mitigation of the carbonate precipitation issue in KOH solutions in alkaline fuel cells (AFCs). However, achieving high-performance AEMFCs with long-term durability reamins challening and strongly relies on developments in the membrane–electrode assembly (MEA), which contains the membrane, the catalyst layers/ionomers, and the gas diffusion layers (GDLs), and the fundamental understaning of their interplay.

This Special Issue, titled “Anion Exchange Membrane Fuel Cells”, aims to encompass recent advances in the development and operation of MEAs, which have promising potency and persistence for AEMFCs, electrolyzers, and their related applications. The Special Issue will accept original research articles and reviews in subject areas, including the synthesis, fabrication, mathematical modeling, and simulation of anion exchange membranes, non-PGM catalysts, ionomers, gas diffusion layers, and other schemes related to their interplay or a comparative study of different fuel cell technologies to provide insight into the implementation of high-performance and long-durability anion exchange membrane fuel cells and related applications at large scale and low cost.

Dr. Chih-Liang Wang
Prof. Dr. Hsiharng Yang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Membranes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • membrane
  • non-platinum group metal (PGM)
  • ionomer
  • gas diffusion electrode
  • fuel cell
  • electrolyzer
  • hydrogen production

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Published Papers (2 papers)

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Research

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11 pages, 1424 KiB  
Article
Treatment of Spent Pickling Solutions by Diffusion Dialysis Using Anion-Exchange Membrane Neosepta-AFN
by Helena Bendová and Libor Dušek
Membranes 2023, 13(1), 9; https://doi.org/10.3390/membranes13010009 - 21 Dec 2022
Cited by 3 | Viewed by 1641
Abstract
This article presents the possibility of using diffusion dialysis for processing spent pickling solution from pickling stainless steels with a mixture of nitric acid and hydrofluoric acid. A counter-current two-compartment dialyzer equipped with an anion-exchange membrane Neosepta-AFN was used to study and compare [...] Read more.
This article presents the possibility of using diffusion dialysis for processing spent pickling solution from pickling stainless steels with a mixture of nitric acid and hydrofluoric acid. A counter-current two-compartment dialyzer equipped with an anion-exchange membrane Neosepta-AFN was used to study and compare the diffusion dialysis of model mixture of hydrofluoric acid and ferric nitrate and a real spent pickling solution. The separation efficiency was characterized by the acid recovery yield, the rejection coefficient of the metals, the permeability coefficient of the membrane, and the separation factor. These characteristics were calculated from the data obtained at steady state. For the real spent pickling solution tested, the permeability values of nitrates 1.7 × 10−6 m s−1, fluorides 0.4 × 10−6 m s−1, and ferric ions 1.1 × 10−7 m s−1 were achieved. The separation factor for nitrates/ferric ions was 15.7 and 3.6 for fluorides/ferric ions. Furthermore, the dependencies of recovery yield and rejection for different concentrations of hydrofluoric acid and ferric nitrate were determined. Full article
(This article belongs to the Special Issue Anion Exchange Membrane Fuel Cells (AEMFCs))
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Review

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19 pages, 14185 KiB  
Review
Computational Approaches to Alkaline Anion-Exchange Membranes for Fuel Cell Applications
by Cecil Naphtaly Moro Ouma, Kingsley Onyebuchi Obodo and Dmitri Bessarabov
Membranes 2022, 12(11), 1051; https://doi.org/10.3390/membranes12111051 - 27 Oct 2022
Cited by 4 | Viewed by 2837
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Anion Exchange Membrane Fuel Cells (AEMFCs))
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