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Metals
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Advanced Hydrogen Storage Metallic Materials/Nanomaterials
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Advanced Hydrogen Storage Metallic Materials/Nanomaterials

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 9308

Special Issue Editor

Prof. Dr. Mieczyslaw Jurczyk

E-Mail Website
Guest Editor
Institute of Materials Science and Engineering, Poznan University of Technology, M.Sklodowska-Curie 5 Sq., 60-965 Poznan, Poland
Interests: nanostructured materials; non-equilibrium processing and properties of advanced materials/nanomaterials; microstructural characterization; powder processing; composites/nanocomposites; porous metallic bionanomaterials/bionanocomposites; hydrogen storage materials/nanomaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Hydrogen storage is a topical goal in the development of a hydrogen economy. Increasing application of hydrogen energy is the only way forward to meet the objectives of Department of Energy (DOE), USA, i.e., reducing greenhouse gases, increasing energy security, and strengthening the developing countries economy.

One of the major impediments for the transition to a hydrogen-based energy system is the lack of satisfactory hydrogen storage alternatives. An improvement of the storage and kinetic properties of alloy hydrides can be achieved by a microstructure modification.

Nanotechnology could help to speed up the journey toward a hydrogen society. Nanocrystalline metal hydrides offer a breakthrough in the prospects for practical applications. Their excellent properties are a result of the combined engineering of many factors: alloy composition, surface properties, microstructure, grain size, and others. In the development of nanocrystalline hydrides, the goal is not only to improve operational properties of the existing hydrides but also (more importantly) to create a new generation of materials, with the properties being designed and controlled to fulfill the particular demands of different applications.

In the development of nanocrystalline hydrides, the goal is not only to improve the operational properties of the existing hydrides but also (more importantly) to create a new generation of materials, with the properties being designed and controlled to fulfill the particular demands of different applications.

For this Special Issue of Metals, we invite both original research papers and reviews, bringing together work focusing on new materials/nanomaterials, processing methods, characterization, testing, or a combination of methods and applications of hydrogen storage alloys as well as those that involve theoretical studies. In order to optimize the choice of the materials for a selected application, a better understanding of the role of each alloy constituent on the electronic properties of the material is crucial.

Prof. Dr. Mieczyslaw Jurczyk
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. Metals 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 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
  • Nanostructural materials
  • Mechanical alloying
  • Electrochemical reactions
  • Hydrogen storage
  • Ni–MHx batteries

Published Papers (4 papers)

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Research

13 pages, 6349 KiB  
Article
Hydrogen Accumulation and Distribution in Titanium Coatings at Gas-Phase Hydrogenation
by Andrey Lider, Viktor Kudiiarov, Egor Kashkarov, Maxim Syrtanov, Tatyana Murashkina, Anton Lomygin, Ivan Sakvin, Dmitri Karpov and Alexander Ivanov
Metals 2020, 10(7), 880; https://doi.org/10.3390/met10070880 - 02 Jul 2020
Cited by 6 | Viewed by 1855
Abstract
This work is devoted to studying the accumulation of hydrogen in titanium coatings to use a completely new concept of hydrogen accumulators based on a system of easily replaceable cartridges. Modern hydrogen accumulators based on magnesium powder have several problems associated with uneven [...] Read more.
This work is devoted to studying the accumulation of hydrogen in titanium coatings to use a completely new concept of hydrogen accumulators based on a system of easily replaceable cartridges. Modern hydrogen accumulators based on magnesium powder have several problems associated with uneven heating during hydrogen desorption. Increasing the efficiency of hydrogen accumulators and the possibility of their reuse and/or repair remains a topical problem. For the analysis of the microstructure of the received titanium coatings, scanning electron microscopy (SEM) was used, the structural-phase state was studied using x-ray diffraction (XRD) analysis. The coatings were hydrogenation by gas-phase saturation at 450–550 °C. Increased film thickness reduced the storage capacity of coatings. Besides hydrogenation at 450 °C, 20 µm of titanium coatings accumulated 3.96 wt.%, while 80 µm of coatings accumulated 3.98 wt.%. The chemical composition of the coatings before and after the hydrogenation was controlled using glow-discharge optical emission spectroscopy. Full article
(This article belongs to the Special Issue Advanced Hydrogen Storage Metallic Materials/Nanomaterials)
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10 pages, 2141 KiB  
Article
In Situ Time-Resolved Decomposition of β-Hydride Phase in Palladium Nanoparticles Coated with Metal-Organic Framework
by Mikhail V. Kirichkov, Aram L. Bugaev, Alina A. Skorynina, Vera V. Butova, Andriy P. Budnyk, Alexander A. Guda, Alexander L. Trigub and Alexander V. Soldatov
Metals 2020, 10(6), 810; https://doi.org/10.3390/met10060810 - 17 Jun 2020
Cited by 1 | Viewed by 2376
Abstract
The formation of palladium hydrides is a well-known phenomenon, observed for both bulk and nanosized samples. The kinetics of hydrogen adsorption/desorption strongly depends on the particle size and shape, as well as the type of support and/or coating of the particles. In addition, [...] Read more.
The formation of palladium hydrides is a well-known phenomenon, observed for both bulk and nanosized samples. The kinetics of hydrogen adsorption/desorption strongly depends on the particle size and shape, as well as the type of support and/or coating of the particles. In addition, the structural properties of hydride phases and their distribution also depend on the particle size. In this work, we report on the in situ characterization of palladium nanocubes coated with HKUST-1 metal-organic framework (Pd@HKUST-1) during desorption of hydrogen by means of synchrotron-based time-resolved X-ray powder diffraction. A slower hydrogen desorption, compared to smaller sized Pd nanoparticles was observed. Rietveld refinement of the time-resolved data revealed the remarkable stability of the lattice parameters of α- and β-hydride phases of palladium during the α- to β- phase transition, denoting the behavior more similar to the bulk materials than nanoparticles. The stability in the crystal sizes for both α- and β-hydride phases during the phase transition indicates that no sub-domains are formed within a single particle during the phase transition. Full article
(This article belongs to the Special Issue Advanced Hydrogen Storage Metallic Materials/Nanomaterials)
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12 pages, 1794 KiB  
Article
Effect of Substitutional Elements on the Thermodynamic and Electrochemical Properties of Mechanically Alloyed La1.5Mg0.5Ni7−xMx alloys (M = Al, Mn)
by Marek Nowak, Mateusz Balcerzak and Mieczyslaw Jurczyk
Metals 2020, 10(5), 578; https://doi.org/10.3390/met10050578 - 28 Apr 2020
Cited by 7 | Viewed by 1966
Abstract
The A2B7-type La-Mg-Ni-M-based (M = Al, Mn) intermetallic compounds were produced by mechanical alloying and annealing. The thermodynamic and electrochemical properties of these materials were studied. The nickel substitution by aluminum and manganese in the La-Mg-Ni system improves the [...] Read more.
The A2B7-type La-Mg-Ni-M-based (M = Al, Mn) intermetallic compounds were produced by mechanical alloying and annealing. The thermodynamic and electrochemical properties of these materials were studied. The nickel substitution by aluminum and manganese in the La-Mg-Ni system improves the kinetics of hydrogen absorption. The hydrogen desorption capacity of Mn substituted compounds is improved significantly, and it reaches the value of 1.79 wt.% at 303 K when the composition is La1.5Mg0.5Ni6.80Mn0.20. On the other hand, the La1.5Mg0.5Ni6.85Al0.15 shows a much higher reversible electrochemical capacity than the La1.5Mg0.5Ni7 materials at the 50th cycle. The electrochemical discharge capacity stability increases with the increasing value of Al and Mn up to x = 0.2 and 0.3, respectively. Additionally, a reduction in the discharge capacity was measured for the Al and Mn content above x = 0.25 and 0.5, respectively. From the practical aspect, only La1.5Mg0.5Ni6.80Mn0.20 has a potential in the application as a hydrogen storage material. Full article
(This article belongs to the Special Issue Advanced Hydrogen Storage Metallic Materials/Nanomaterials)
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16 pages, 9082 KiB  
Article
Nickel, Graphene, and Yttria-Stabilized Zirconia (YSZ)-Added Mg by Grinding in Hydrogen Atmosphere for Hydrogen Storage
by Myoung Youp Song, Eunho Choi and Young Jun Kwak
Metals 2019, 9(12), 1347; https://doi.org/10.3390/met9121347 - 14 Dec 2019
Cited by 5 | Viewed by 2484
Abstract
Magnesium (Mg) has good hydrogen storage features except for its slow reaction kinetics with hydrogen and high hydride decomposition temperature. Yttria (Y2O3)-stabilized zirconia (ZrO2) (YSZ), nickel (Ni), and graphene were picked as additives to Mg to solve [...] Read more.
Magnesium (Mg) has good hydrogen storage features except for its slow reaction kinetics with hydrogen and high hydride decomposition temperature. Yttria (Y2O3)-stabilized zirconia (ZrO2) (YSZ), nickel (Ni), and graphene were picked as additives to Mg to solve these problems. Samples with a composition of 92.5 wt% Mg + 2.5 wt% YSZ + 2.5 wt% Ni + 2.5 wt% graphene (designated as Mg + YSZ + Ni + graphene) were prepared by grinding in hydrogen atmosphere. The activation of Mg + YSZ + Ni + graphene was finished at the third cycle (n = 3). Mg + YSZ + Ni + graphene had an efficient hydrogen storage capacity (the amount of hydrogen absorbed for 60 min) over 7 wt% (7.11 wt%) at n = 1. Mg + YSZ + Ni + graphene contained Mg2Ni phase after cycling. The addition of Ni and Ni + YSZ greatly increased the initial hydride formation and decomposition rates, and the amount of hydrogen absorbed and released for 60 min, Ha (60 min) and Hd (60 min), respectively, of a 95 wt% Mg + 5 wt% graphene sample (Mg + graphene). Rapid nucleation of the Mg2Ni-H solid solution in Ni-containing samples is believed to have led to higher initial decomposition rates than Mg + graphene and Mg. The addition of YSZ also enhanced the initial decomposition rate and Hd (60 min) compared to a sample with a composition of 95 wt% Mg + 2.5 wt% Ni + 2.5 wt% graphene (Mg + Ni + graphene). Full article
(This article belongs to the Special Issue Advanced Hydrogen Storage Metallic Materials/Nanomaterials)
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