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Polymers
Special Issues
Hydrogen and Fuel Cells: Clean and Energy Efficiency
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Hydrogen and Fuel Cells: Clean and Energy Efficiency

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (23 February 2024) | Viewed by 3893

Special Issue Editors

Prof. Dr. José Javier López Cascales

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Guest Editor
Department of Chemical and Environmental Engineering, Universidad Politécnica de Cartagena, 30203 Cartagena, Spain
Interests: fuel cells; catalyst deposition; electrospray; gas diffusion layer technology; electrolyzers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Loreto Daza Bertrand

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Guest Editor
Instituto de Catálisis y Petroleoquímica (CSIC), Campus Cantoblanco, C/Marie Curie 2, 28049 Madrid, Spain
Interests: hydrogen; fuel cells; catalysts; Pt; PEMFC

Special Issue Information

Dear Colleagues,

Hydrogen is attracting significant interest for the eventual substitution of fossil fuels in a huge number of stationary and mobile applications. In this context, polymers play a special role in the development of critical parts of fuel cells and electrolyzers, as do proton membranes, polymer binders in the catalyst inks, and polymer bipolar plates, to improve their performance and durability. The H2-FC binomial will make it possible to supply clean and efficient energy, contributing to decarbonizing society. This Special Issue entitled “Hydrogen and Fuel Cells: Clean and Energy Efficiency” aims to collect the main advances in these technologies: fuel cells, as an efficient energy transformation system, and hydrogen production as a clean fuel. It will cover both basic and applied aspects, from the study and development of new components for fuel cells to the design and manufacture of prototypes. It will also present advances in hydrogen production, distribution, storage, and supply systems.

This Special Issue is also in cooperation with the congress Iberconappice-2023 and welcomes submissions from participants to the Congress

Prof. Dr. José Javier López Cascales
Prof. Dr. Loreto Daza Bertrand
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. Polymers is an international peer-reviewed open access semimonthly 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 2700 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

  • hydrogen
  • fuel cells
  • components
  • applications
  • hydrogen production
  • hydrogen storage

Published Papers (2 papers)

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Research

17 pages, 2059 KiB  
Article
Integrated Heat Recovery System Based on Mixed Ionic–Electronic Conducting Membrane for Improved Solid Oxide Co-Electrolyzer Performance
by José Sánchez-Luján, Ángel Molina-García and José Javier López-Cascales
Polymers 2024, 16(7), 932; https://doi.org/10.3390/polym16070932 - 28 Mar 2024
Viewed by 718
Abstract
The current state of mixed ionic–electronic conducting ceramic membrane technology presents significant advancements with potential applications in various fields including solid oxide electrolyzers, fuel cells, hydrogen production, CO2 reduction, and membrane reactors for chemical production and oxygen separation. Particularly in oxygen separation [...] Read more.
The current state of mixed ionic–electronic conducting ceramic membrane technology presents significant advancements with potential applications in various fields including solid oxide electrolyzers, fuel cells, hydrogen production, CO2 reduction, and membrane reactors for chemical production and oxygen separation. Particularly in oxygen separation applications, optimal conditions closely align with the conditions of oxygen-rich air streams emitted from the anode of solid oxide co-electrolyzers. This paper describes and analyzes a novel integrated heat recovery system based on mixed ionic–electronic conducting membranes. The system operates in two stages: firstly, oxygen is separated from the anode output stream using mixed ionic–electronic conducting membranes aided by a vacuum system, followed by the heat recovery process. Upon oxygen separation, the swept gas stream is recirculated at temperatures near thermoneutral conditions, resulting in performance improvements at both cell and system levels. Additionally, an oxygen stream is generated for various applications. An Aspen HYSYS® model has been developed to calculate heat and material balances, demonstrating the efficiency enhancements of the proposed system configuration. Full article
(This article belongs to the Special Issue Hydrogen and Fuel Cells: Clean and Energy Efficiency)
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24 pages, 3894 KiB  
Article
Effects of Cathode GDL Gradient Porosity Distribution along the Flow Channel Direction on Gas–Liquid Transport and Performance of PEMFC
by Ruijie Zhu, Zhigang Zhan, Heng Zhang, Qing Du, Xiaosong Chen, Xin Xiang, Xiaofei Wen and Mu Pan
Polymers 2023, 15(7), 1629; https://doi.org/10.3390/polym15071629 - 24 Mar 2023
Cited by 5 | Viewed by 2295
Abstract
The gas diffusion layer (GDL) is an important component of proton exchange membrane fuel cells (PEMFCs), and its porosity distribution has considerable effects on the transport properties and durability of PEMFCs. A 3-D two-phase flow computation fluid dynamics model was developed in this [...] Read more.
The gas diffusion layer (GDL) is an important component of proton exchange membrane fuel cells (PEMFCs), and its porosity distribution has considerable effects on the transport properties and durability of PEMFCs. A 3-D two-phase flow computation fluid dynamics model was developed in this study, to numerically investigate the effects of three different porosity distributions in a cathode GDL: gradient-increasing (Case 1), gradient-decreasing (Case 3), and uniform constant (Case 2), on the gas–liquid transport and performance of PEMFCs; the novelty lies in the porosity gradient being along the channel direction, and the physical properties of the GDL related to porosity were modified accordingly. The results showed that at a high current density (2400 mA·cm−2), the GDL of Case 1 had a gas velocity of up to 0.5 cm·s−1 along the channel direction. The liquid water in the membrane electrode assembly could be easily removed because of the larger gas velocity and capillary pressure, resulting in a higher oxygen concentration in the GDL and the catalyst layer. Therefore, the cell performance increased. The voltage in Case 1 increased by 8% and 71% compared to Cases 2 and 3, respectively. In addition, this could ameliorate the distribution uniformity of the dissolved water and the current density in the membrane along the channel direction, which was beneficial for the durability of the PEMFC. The distribution of the GDL porosity at lower current densities had a less significant effect on the cell performance. The findings of this study may provide significant guidance for the design and optimization of the GDL in PEMFCs. Full article
(This article belongs to the Special Issue Hydrogen and Fuel Cells: Clean and Energy Efficiency)
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