Topical Collection "Materials and Technologies for Hydrogen and Fuel Cells"

A topical collection in Materials (ISSN 1996-1944). This collection belongs to the section "Energy Materials".

Editors

Dr. Antonino Salvatore Aricò
E-Mail Website1 Website2
Collection Editor
Istituto di Tecnologie Avanzate per l'Energia, Consiglio Nazionale delle Ricerche, 98126 Messina, Italy
Interests: materials for energy, electrochemistry, systems, fuel cells, electrolysis, photo-electrochemical cells, batteries, physico-chemical characterisation
Special Issues and Collections in MDPI journals
Dr. Vincenzo Baglio
E-Mail Website
Collection Editor
CNR-ITAE Institute for Advanced Energy Technologies “N. Giordano”, Via Salita S. Lucia sopra Contesse 5, 98126 Messina, Italy
Interests: polymer electrolyte fuel cells; direct alcohol fuel cells; water electrolysis; metal–air batteries; dye-sensitized solar cells; photo-electrolysis; carbon dioxide electro-reduction
Special Issues and Collections in MDPI journals
Dr. Francesco Lufrano
E-Mail Website
Collection Editor
CNR—ITAE, Istituto di Tecnologie Avanzate per l’Energia “Nicola Giordano”, Via Salita S. Lucia sopra Contesse n. 5, 98126 S. Lucia-Messina, Italy
Interests: polymers, membranes, nano carbon materials, metal oxides and hybrid materials, fuel cells, supercapacitors, electrochemistry
Special Issues and Collections in MDPI journals

Topical Collection Information

After publishing the Special Issue “Hydrogen and Fuel Cells: From Materials to Systems”, we would like to announce the publication of a collection on “Materials and Technologies for Hydrogen and Fuel Cells”. The objective is to highlight new results and advances in materials science, processing, characterization, technology development and system testing of various types of fuel cells and hydrogen processes. As is well known, the diffusion of efficient and sustainable energy conversion technologies and zero-emission vehicles on a wide scale is largely required to address urgent environmental issues such as polluting emissions, global warming and climate change. Fuel cells can provide an effective solution and hydrogen together with electricity can become the main energy vectors in the future energy system, covering most of the energy chain. These technologies comply with the requirement of a low carbon economy by 2050, where both hydrogen and a highly efficient distributed power generation using fuel cells, providing both electrical power and heat, can significantly reduce the emission of greenhouse gases. Original papers are solicited on all types of fuel cells and hydrogen production technologies. Recent developments in advanced materials, processes, characterization, stack designs, and systems are of particular interest together with contributions addressing emerging fields and new applications of these technologies. Articles and reviews dealing with fuel cells and hydrogen for different market applications, including zero-emission vehicles, grid-balancing service, power-to-gas, portable power systems, combined heat and power (CHP) production, consumer devices and distributed energy systems are very welcome.

Dr. Antonino Salvatore Aricò
Dr. Vincenzo Baglio
Dr. Francesco Lufrano
Guest Editors

Manuscript Submission Information

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Published Papers (3 papers)

2021

Jump to: 2020, 2019

Open AccessArticle
Flexible Supercapacitors Based on Graphene/Boron Nitride Nanosheets Electrodes and PVA/PEI Gel Electrolytes
Materials 2021, 14(8), 1955; https://doi.org/10.3390/ma14081955 - 14 Apr 2021
Viewed by 452
Abstract
All-solid-state supercapacitors have gained increasing attention as wearable energy storage devices, partially due to their flexible, safe, and lightweight natures. However, their electrochemical performances are largely hampered by the low flexibility and durability of current polyvinyl alcohol (PVA) based electrolytes. Herein, a novel [...] Read more.
All-solid-state supercapacitors have gained increasing attention as wearable energy storage devices, partially due to their flexible, safe, and lightweight natures. However, their electrochemical performances are largely hampered by the low flexibility and durability of current polyvinyl alcohol (PVA) based electrolytes. Herein, a novel polyvinyl alcohol-polyethyleneimine (PVA-PEI) based, conductive and elastic hydrogel was devised as an all-in-one electrolyte platform for wearable supercapacitor (WSC). For proof-of-concept, we assembled all-solid-state supercapacitors based on boron nitride nanosheets (BNNS) intercalated graphene electrodes and PVA-PEI based gel electrolyte. Furthermore, by varying the electrolyte ions, we observed synergistic effects between the hydrogel and the electrode materials when KOH was used as electrolyte ions, as the Graphene/[email protected] WSCs exhibited a significantly improved areal capacitance of 0.35 F/cm2 and a smaller ESR of 6.02 ohm/cm2. Moreover, due to the high flexibility and durability of the PVA-PEI hydrogel electrolyte, the developed WSCs behave excellent flexibility and cycling stability under different bending states and after 5000 cycles. Therefore, the conductive, yet elastic, PVA-PEI hydrogel represents an attractive electrolyte platform for WSC, and the Graphene/[email protected] WSCs shows broad potentials in powering wearable electronic devices. Full article
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2020

Jump to: 2021, 2019

Open AccessArticle
Characterization of Glass-Ceramic Sealant for Solid Oxide Fuel Cells at Operating Conditions by Electrochemical Impedance Spectroscopy
Materials 2020, 13(21), 4702; https://doi.org/10.3390/ma13214702 - 22 Oct 2020
Viewed by 510
Abstract
A commercially available glass-ceramic composition is applied on a ferritic stainless steel (FSS) substrate reproducing a type of interface present in solid oxide fuel cells (SOFCs) stacks. Electrochemical impedance spectroscopy (EIS) is used to study the electrical response of the assembly in the [...] Read more.
A commercially available glass-ceramic composition is applied on a ferritic stainless steel (FSS) substrate reproducing a type of interface present in solid oxide fuel cells (SOFCs) stacks. Electrochemical impedance spectroscopy (EIS) is used to study the electrical response of the assembly in the temperature range of 380–780 °C and during aging for 250 h at 780 °C. Post-experiment analyses, performed by means of X-ray diffraction (XRD), and along cross-sections by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis, highlight the microstructural changes promoted by aging conditions over time. In particular, progressive crystallization of the glass-ceramic, high temperature corrosion of the substrate and diffusion of Fe and Cr ions from the FSS substrate into the sealant influence the electrical response of the system under investigation. The electrical measurements show an increase in conductivity to 5 × 10−6 S∙cm−1, more than one order of magnitude below the maximum recommended value. Full article
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Graphical abstract

2019

Jump to: 2021, 2020

Open AccessReview
Alanates, a Comprehensive Review
Materials 2019, 12(17), 2724; https://doi.org/10.3390/ma12172724 - 25 Aug 2019
Cited by 3 | Viewed by 1165
Abstract
Hydrogen storage is widely recognized as one of the biggest not solved problem within hydrogen technologies. The slow development of the materials and systems for hydrogen storage has resulted in a slow spread of hydrogen applications. There are many families of materials that [...] Read more.
Hydrogen storage is widely recognized as one of the biggest not solved problem within hydrogen technologies. The slow development of the materials and systems for hydrogen storage has resulted in a slow spread of hydrogen applications. There are many families of materials that can store hydrogen; among them, the alanate family can be of interest. Basic research papers and reviews have been focused on alanates of group 1 and 2. However, there are many alanates of transition metals, main group, and lanthanides that deserve attention in a review. This work is a comprehensive compilation of all known alanates. The approaches towards tuning the kinetics and thermodynamics of alanates are also covered in this review. These approaches are the formation of reactive composites, double cation alanates, or anion substitution. The crystallographic and X-ray diffraction characteristics of each alanate are presented along with this review. In the final sections, a discussion of the infrared, Raman, and thermodynamics was included. Full article
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