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Research on Integration and Storage Technology of Hydrogen Energy: 2nd Edition

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A5: Hydrogen Energy".

Deadline for manuscript submissions: 5 March 2026 | Viewed by 649

Special Issue Editors


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Guest Editor
1. Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon, Geesthacht, Germany
2. Institute of Applied Material Science, Helmut-Schmidt University, Hamburg, Germany
Interests: energy storage; hydrogen; hydrogen energy; materials; system integration
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
1. Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon, Geesthacht, Germany
2. Institute of Applied Material Science, Helmut-Schmidt University, Hamburg, Germany
Interests: energy storage; hydrogen; hydrogen energy; materials; system integration
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With this Special Issue, we would like to address the importance of system integration for the implementation of hydrogen technology. Many of the applications have already reached a high technological readiness level. Therefore, system integration in real applications is becoming an increasingly important field of research and development. By system integration, we mean the spatial and technical integration of the components of the hydrogen chain. The hydrogen chain involves its production, storage and utilization in mobile or stationary applications. For this, the system integration must take into consideration not only mass flows but also temperature and pressure conditions for the respective application. In the forthcoming years, this field of research will gain further importance due to the impulse of hydrogen technology to reduce CO2 emissions and cover the growing energy demand. Against this background, we look forward to receiving exciting contributions to this Special Issue.

Prof. Dr. Julian Jepsen
Dr. Julian Puszkiel
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 250 words) can be sent to the Editorial Office for assessment.

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. Energies 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 2600 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 technology
  • system integration
  • hydrogen storage
  • hydrogen applications
  • energy storage
  • renewable sources
  • green hydrogen
  • hydrogen production
  • hydrogen utilization
  • experimental system integration
  • system simulation
  • finite element simulation
  • components design

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Published Papers (1 paper)

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Research

18 pages, 4870 KB  
Article
Characterization of Proton Exchange Membrane Fuel Cell Operating in Electrochemical Hydrogen Compression Mode
by Anamarija Stoilova Pavasović, Senka Gudić, Ivan Pivac and Frano Barbir
Energies 2026, 19(1), 257; https://doi.org/10.3390/en19010257 - 3 Jan 2026
Viewed by 325
Abstract
This study examines the performance of a proton exchange membrane fuel cell operated in electrochemical hydrogen compression (EHC) mode, focusing on the effects of temperature, relative humidity (RH), and pressure on water management and efficiency. Two humidification strategies were investigated: (i) a dry [...] Read more.
This study examines the performance of a proton exchange membrane fuel cell operated in electrochemical hydrogen compression (EHC) mode, focusing on the effects of temperature, relative humidity (RH), and pressure on water management and efficiency. Two humidification strategies were investigated: (i) a dry cathode with humidified anode hydrogen and (ii) a flooded cathode with controlled anode humidification. Experiments were conducted at different temperatures (from 35 to 70 °C), RH levels (from 0 to 100%), and compression ratios of 1 and 2, using polarization curves, electrochemical impedance spectroscopy, and linear sweep voltammetry (LSV). In the dry cathode configuration, optimal performance occurred at 70 °C with fully humidified anode gas, achieving current densities above 2 A cm−2 at voltages below 0.3 V. Partial humidification caused instability due to membrane dehydration. In the flooded cathode, high cathode pressure increased mass transport resistance, while excessive inlet humidification promoted flooding and consequently reduced the efficiency. LSV results highlighted the trade-off between proton conductivity and hydrogen back diffusion, particularly for thin membranes used in this study. The findings demonstrate that precise water balance is essential for stable and efficient EHC operation and provide guidelines for optimizing compression performance, supporting the development of high-efficiency and low-maintenance hydrogen compression systems for stationary and mobile applications. Full article
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