Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.5
3.2
Journals
Energies
Special Issues
Hydrides: Science and Technology
energies-logo
Submit to Energies Review for Energies Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Hydrides: Science and Technology

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

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 8471

Special Issue Editor

Prof. Dr. Robert A. Varin

E-Mail Website
Guest Editor
Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada
Interests: nanostructured and amorphous materials for solid state hydrogen storage; nanostructure superconductors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the late 1940s, the synthesis methodologies and properties of hydrides have attracted the attention of chemists, physicists and engineers. From a purely scientific point of view, hydrides constitute fascinating materials with diverse crystallographic structures and bonding characteristics, exhibiting a whole spectrum of unusual chemical and physical properties. For the past 20 years they have also attracted the attention of engineers since they have the potential for very efficient generation and storage of hydrogen in the solid state. For reversible hydrides, their dehydrogenation/rehydrogenation phenomenon is an example of energy transformation that may be utilized as either hydrogen or heat storage system. Dehydrogenation of irreversible hydrides can supply very clean hydrogen gas (H2) that is a potential energy carrier. Hydrogen gas is necessary for the implementation of the world-wide hydrogen economy in which an efficient usage of fuel cells where H2 in contact with oxygen (O2) is converted into an electrical energy. Engineering systems for supplying H2 to fuel cells in the future hydrogen economy, based on solid hydrides, are the most attractive long-term solution. However, solid state hydrogen storage in the most important automotive sector is extremely challenging and requires high H2 capacity (>11wt.%) hydride systems, capable of dehydrogenation at low temperatures (<100°C) under 1 bar H2 pressure and exhibiting reasonably fast “on-board” reversibility. Unfortunately, a hydride system suitable for automotive H2 storage has not yet been found. However, there are a number of other potential applications for H2 generation systems, such as portable electronic devices, stationary auxiliary power, off-road vehicles, portable electronics and others that may not require “on-board” reversibility. Recently, substantial research efforts have also been devoted to newly developing areas in the application of metal and complex hydrides for Li-ion batteries and electrochemical storage.

I cordially invite you to submit manuscripts on all the above and other related topics for this Special Issue "Hydrides: Science and Technology”. Both theoretical and experimental contributions are welcomed.

Prof. Dr. Robert A. Varin
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. 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

  • metal hydrides
  • complex hydrides
  • nanocomposite hydride systems
  • confined hydrides
  • hydride ionic conductors
  • hydrides for rechargeable batteries (solid electrolytes and electrodes)
  • hydrides for solid state hydrogen generation and/or storage
  • hydrides for electrochemical hydrogen storage
  • engineering applications of hydrides
  • modelling
  • non-hydride materials for hydrogen storage

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

11 pages, 3449 KiB  
Article
Hydrogenation Ability of Mg-Li Alloys
by Magda Pęska, Tomasz Czujko and Marek Polański
Energies 2020, 13(8), 2080; https://doi.org/10.3390/en13082080 - 21 Apr 2020
Cited by 8 | Viewed by 2451
Abstract
The Mg-Li binary system is characterized by the presence of α-Mg(Li) and β-Li(Mg) phases, where magnesium exists in ordered and disordered forms that may affect the hydrogenation properties of magnesium. Therefore, the hydrogenation properties of an AZ31 alloy modified by the addition of [...] Read more.
The Mg-Li binary system is characterized by the presence of α-Mg(Li) and β-Li(Mg) phases, where magnesium exists in ordered and disordered forms that may affect the hydrogenation properties of magnesium. Therefore, the hydrogenation properties of an AZ31 alloy modified by the addition of 4.0 wt.%, 7.5 wt.% and 15.0 wt.% lithium were studied. The morphology (scanning electron microscopy (SEM)), structure, phase composition (X-ray diffraction (XRD)) and hydrogenation properties (differential scanning calorimetry (DSC)) of AZ31 with various lithium contents were investigated. It was found that the susceptibility of magnesium in the form of α-Mg(Li) to hydrogenation was higher than that for the magnesium occupying a disordered position in β-Li(Mg) solid solutions. Magnesium hydride was obtained as a result of hydrogenation of the AZ31 alloy that was modified with 4.0 wt.%, 7.5 wt.% and 15.0 wt.% additions of lithium, and was characterized by high hydrogen desorption activation energies of 250, 187 and 224 kJ/mol, respectively. Full article
(This article belongs to the Special Issue Hydrides: Science and Technology)
►▼ Show Figures

Graphical abstract

13 pages, 10591 KiB  
Article
The Influence of Cerium on the Hydrogen Storage Properties of La1-xCexNi5 Alloys
by Magda Pęska, Julita Dworecka-Wójcik, Tomasz Płociński and Marek Polański
Energies 2020, 13(6), 1437; https://doi.org/10.3390/en13061437 - 19 Mar 2020
Cited by 14 | Viewed by 2591
Abstract
La1-xCexNi5 alloys (x = 0, 0.09, 0.25 and 0.5) were investigated in terms of their structures, phase contents, hydrogen storage properties and microhardness. It was confirmed that a cerium addition to the reference (LaNi5) alloy caused [...] Read more.
La1-xCexNi5 alloys (x = 0, 0.09, 0.25 and 0.5) were investigated in terms of their structures, phase contents, hydrogen storage properties and microhardness. It was confirmed that a cerium addition to the reference (LaNi5) alloy caused structural changes such as lattice shrinkage and, as a result, changed both the absorption and desorption pressures and the enthalpies of formation and decomposition. The alloy with the highest cerium content was found to possess a two-phase structure, probably as a result of nonequilibrium cooling conditions during its manufacturing process. The microhardness was found to increase to some extent with the cerium content and decrease for samples with the highest cerium content. Full article
(This article belongs to the Special Issue Hydrides: Science and Technology)
►▼ Show Figures

Graphical abstract

12 pages, 2365 KiB  
Article
Enhancement Effect of Bimetallic Amide K2Mn(NH2)4 and In-Situ Formed KH and Mn4N on the Dehydrogenation/Hydrogenation Properties of Li–Mg–N–H System
by Gökhan Gizer, Hujun Cao, Julián Puszkiel, Claudio Pistidda, Antonio Santoru, Weijin Zhang, Teng He, Ping Chen, Thomas Klassen and Martin Dornheim
Energies 2019, 12(14), 2779; https://doi.org/10.3390/en12142779 - 19 Jul 2019
Cited by 9 | Viewed by 2717
Abstract
In this work, we investigated the influence of the K2Mn(NH2)4 additive on the hydrogen sorption properties of the Mg(NH2)2 + 2LiH (Li–Mg–N–H) system. The addition of 5 mol% of K2Mn(NH2)4 [...] Read more.
In this work, we investigated the influence of the K2Mn(NH2)4 additive on the hydrogen sorption properties of the Mg(NH2)2 + 2LiH (Li–Mg–N–H) system. The addition of 5 mol% of K2Mn(NH2)4 to the Li–Mg–N–H system leads to a decrease of the dehydrogenation peak temperature from 200 °C to 172 °C compared to the pristine sample. This sample exhibits a constant hydrogen storage capacity of 4.2 wt.% over 25 dehydrogenation/rehydrogenation cycles. Besides that, the in-situ synchrotron powder X-ray diffraction analysis performed on the as prepared Mg(NH2)2 + 2LiH containing K2Mn(NH2)4 indicates the presence of Mn4N. However, no crystalline K-containing phases were detected. Upon dehydrogenation, the formation of KH is observed. The presence of KH and Mn4N positively influences the hydrogen sorption properties of this system, especially at the later stage of rehydrogenation. Under the applied conditions, hydrogenation of the last 1 wt.% takes place in only 2 min. This feature is preserved in the following three cycles. Full article
(This article belongs to the Special Issue Hydrides: Science and Technology)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop