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Membranes
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Membrane Electrode Assembly (MEA)
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Membrane Electrode Assembly (MEA)

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

Deadline for manuscript submissions: closed (20 June 2022) | Viewed by 19407

Special Issue Editor

Dr. Kimihiko Sugiura

E-Mail Website
Guest Editor
Department of Technological Systems, Mechanical Engineering Course, Osaka Prefecture University College of Technology, Osaka 572-8572, Japan
Interests: molten carbonate fuel cell; direct carbon fuel cell; hydrogen production; CO2 facilitated transport membrane; water management in PEFC; inkjet coating printer for PEFC

Special Issue Information

Dear Colleagues,

In recent years, many natural disasters such as floods and landslides caused by heavy rains, which are thought to be caused by global warming, have occurred around the world. In order to solve these problems, countries around the world are beginning to move toward the realization of decarbonization in order to comply with the Paris Agreement. Under these circumstances, the transition from fossil fuels to hydrogen is becoming necessary, and the commercialization and widespread use of fuel cells—which are the foundation for the construction of a hydrogen society—is an important issue. In particular, PEFCs are most commercialized close to consumers, and for further dissemination, it is desirable to improve the performance and lower the cost of MEAs, which are the main components of PEFCs. The journal Membranes is also a forum for the discussion of polymer application technologies, and this Special Issue in particular is dedicated to MEAs to promote discussions on reducing the cost and improving the performance of PEFCs. We are pleased to invite you to submit your research on the current status of MEA technology. In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: structure of catalyst layer and membrane, manufacturing process of MEA, new catalysts/membranes, platinum and ionomer alternatives, and degradation mechanisms of catalysts/membranes.

We look forward to receiving your contributions.

Dr. Kimihiko Sugiura
Guest Editor

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 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

  • PEFC
  • MEA
  • core–shell platinum catalysts
  • new catalyst materials
  • new membranes
  • degradation of MEA
  • MEA manufacturing process

Published Papers (3 papers)

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Research

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25 pages, 8123 KiB  
Article
Effect of Different Hot-Pressing Pressure and Temperature on the Performance of Titanium Mesh-Based MEA for DMFC
by Xingxing Wang, Yujie Zhang, Yu Zhu, Shuaishuai Lv, Hongjun Ni, Yelin Deng and Yinnan Yuan
Membranes 2022, 12(4), 431; https://doi.org/10.3390/membranes12040431 - 16 Apr 2022
Cited by 6 | Viewed by 3395
Abstract
The hot-pressing process of the membrane electrode assembly (MEA) is one of the research hotspots in the field of the fuel cell. To obtain suitable titanium mesh-based MEA hot pressing process parameters, titanium mesh was used as electrode substrate material. The anode and [...] Read more.
The hot-pressing process of the membrane electrode assembly (MEA) is one of the research hotspots in the field of the fuel cell. To obtain suitable titanium mesh-based MEA hot pressing process parameters, titanium mesh was used as electrode substrate material. The anode and cathode of MEA were prepared by the drip-coated method, and the titanium mesh-based MEA was prepared under different hot-pressing pressure and temperature, respectively. The performance of titanium mesh-based MEA was studied by morphological observation, elemental analysis, thickness measurement, single cell test and numerical fitting analysis. The results demonstrated that: with increasing hot-pressing pressure from 0 MPa to 10 MPa, the forming thickness of titanium mesh-based MEA is getting thin gradually, and the peak power density of titanium mesh-based MEA first increased and then gradually decreased; with increasing hot-pressing temperature from 115 °C to 155 °C, the peak power density of titanium mesh-based MEA enhanced at the beginning and then also gradually decreased. Under the premise of a hot-pressing time of 180 s and the optimal operating temperature of DMFC of 60 °C, the appropriate hot-pressing process conditions of titanium mesh-based MEA are a hot-pressing pressure of 5 MPa and a hot-pressing temperature of 135 °C. The results can provide a technological reference for the preparation of titanium mesh MEA for DMFC. Full article
(This article belongs to the Special Issue Membrane Electrode Assembly (MEA))
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Review

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24 pages, 5899 KiB  
Review
A Review of the Transition Region of Membrane Electrode Assembly of Proton Exchange Membrane Fuel Cells: Design, Degradation, and Mitigation
by Daijun Yang, Yongle Tan, Bing Li, Pingwen Ming, Qiangfeng Xiao and Cunman Zhang
Membranes 2022, 12(3), 306; https://doi.org/10.3390/membranes12030306 - 9 Mar 2022
Cited by 17 | Viewed by 5880
Abstract
As the core component of a proton exchange fuel cell (PEMFC), a membrane electrode assembly (MEA) consists of function region (active area), structure region, and transition region. Situated between the function and structure regions, the transition region influences the reliability and durability of [...] Read more.
As the core component of a proton exchange fuel cell (PEMFC), a membrane electrode assembly (MEA) consists of function region (active area), structure region, and transition region. Situated between the function and structure regions, the transition region influences the reliability and durability of the MEA. The degradation of the electrolyte membrane in this region can be induced by mechanical stress and chemical aggression. Therefore, prudent design, reliable and robust structure of the transition region can greatly help avoid early failure of MEAs. This review begins with the summarization of current structural concepts of MEAs, focusing on the transition region structures. It can be seen that aiming at better repeatability and robustness, partly or total integration of the materials in the transition region is becoming a development trend. Next the degradation problem at the transition region is introduced, which can be attributed to the hygro-thermal environment, free radical aggression, air pressure shock, and seal material decomposition. Finally, the mitigation approaches for the deterioration at this region are summarized, with a principle of avoiding the exposure of the membrane at the edge of the catalyst-coated membrane (CCM). Besides, durability test methods of the transition region are included in this review, among which temperature and humidity cycling are frequently used. Full article
(This article belongs to the Special Issue Membrane Electrode Assembly (MEA))
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33 pages, 3332 KiB  
Review
Preparation, Performance and Challenges of Catalyst Layer for Proton Exchange Membrane Fuel Cell
by Meng Xie, Tiankuo Chu, Tiantian Wang, Kechuang Wan, Daijun Yang, Bing Li, Pingwen Ming and Cunman Zhang
Membranes 2021, 11(11), 879; https://doi.org/10.3390/membranes11110879 - 15 Nov 2021
Cited by 30 | Viewed by 9279
Abstract
In this paper, the composition, function and structure of the catalyst layer (CL) of a proton exchange membrane fuel cell (PEMFC) are summarized. The hydrogen reduction reaction (HOR) and oxygen reduction reaction (ORR) processes and their mechanisms and the main interfaces of CL [...] Read more.
In this paper, the composition, function and structure of the catalyst layer (CL) of a proton exchange membrane fuel cell (PEMFC) are summarized. The hydrogen reduction reaction (HOR) and oxygen reduction reaction (ORR) processes and their mechanisms and the main interfaces of CL (PEM|CL and CL|MPL) are described briefly. The process of mass transfer (hydrogen, oxygen and water), proton and electron transfer in MEA are described in detail, including their influencing factors. The failure mechanism of CL (Pt particles, CL crack, CL flooding, etc.) and the degradation mechanism of the main components in CL are studied. On the basis of the existing problems, a structure optimization strategy for a high-performance CL is proposed. The commonly used preparation processes of CL are introduced. Based on the classical drying theory, the drying process of a wet CL is explained. Finally, the research direction and future challenges of CL are pointed out, hoping to provide a new perspective for the design and selection of CL materials and preparation equipment. Full article
(This article belongs to the Special Issue Membrane Electrode Assembly (MEA))
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