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Energies
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Novel 2D Energy Materials and Devices
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Novel 2D Energy Materials and Devices

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "D1: Advanced Energy Materials".

Deadline for manuscript submissions: closed (30 July 2022) | Viewed by 9481

Special Issue Editors

Dr. Venkata Kamalakar Mutta

E-Mail Website
Guest Editor
Department of Physics and Astronomy, Uppsala University, Box 516, SE 751 20, Uppsala, Sweden
Interests: graphene; two-dimensional crystals; nanomagnetic systems; advanced nanodevices; spintronics; graphene spintronics; flexible nanoelectronics and spintronics.
Dr. Soumya Jyoti Ray

E-Mail Website
Guest Editor
Department of Physics, Indian Institute of Technology Patna, Bihta 801 106, India
Interests: two-dimensional layered materials; nanoelectronics; spintronics; superconductivity; magnetism

Special Issue Information

Dear Colleagues,

Starting from graphene, the last decade has revealed the growth of a new class of atomically thin materials called two-dimensional (2D) materials. Like graphene, crystals such as hexagonal boron nitride, transition metal dichalcogenides, phosphorene, and their van der Waals’ heterostructures have shown extraordinary electronic properties, bringing unique prospects for low power nanoelectronics, optoelectronics, spintronics and next generation flexible electronic applications, while being extremely promising for energy harvesting, photovoltaics, energy generation and storage, catalysis, and thermoelectric applications. This special issue “Novel 2D energy materials and devices”, aims to bring together high-quality theoretical and experimental works to highlight the significance of emerging energy-related research in 2D materials.

Therefore, I take the pleasure of welcoming you to submit your manuscripts (full papers, communications, and review articles) covering the outlined and other energy relevant topics to this special issue.

Dr. Venkata Kamalakar Mutta
Dr. Soumya Jyoti Ray
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 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

  • Graphene
  • 2D materials
  • Transition Metal Dichalcogenides (TMDs)
  • Flexible 2D systems
  • Solar energy
  • Supercapacitors
  • Photovoltaics
  • Optoelectronics
  • Spintronics
  • Catalysis

Published Papers (3 papers)

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Research

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11 pages, 2608 KiB  
Article
Experimental and Theoretical Investigation of the Synthesis, Electronic and Magnetic Properties of MnFe2O4 Spinel Ferrite
by Khaoula Aghrich, Sara Mtougui, Fayçal Goumrhar, Mustapha Abdellaoui, Nabila Mamouni, Mohammed Fekhaoui, Amine El Moutaouakil and Omar Mounkachi
Energies 2022, 15(22), 8386; https://0-doi-org.brum.beds.ac.uk/10.3390/en15228386 - 09 Nov 2022
Cited by 5 | Viewed by 1732
Abstract
MnFe2O4 ferrite nanoparticle was synthesized via the sol–gel method, and structural, morphology and magnetic characteristics were investigated. X-ray diffraction analysis showed that the synthesized sample was in a single phase with a spinel-ferrite-like structure (space group Fd-3m). The scanning electron [...] Read more.
MnFe2O4 ferrite nanoparticle was synthesized via the sol–gel method, and structural, morphology and magnetic characteristics were investigated. X-ray diffraction analysis showed that the synthesized sample was in a single phase with a spinel-ferrite-like structure (space group Fd-3m). The scanning electron microscopy displayed homogenous spherical grains with an agglomeration of the particles. The chemical composition determined by energy-dispersive spectroscopy shows the absence of any impurities. To understand the role of magnetic interaction in MnFe2O4 spinel ferrites, the structural and magnetic properties of MnFe2O4 have been explored theoretically. Based on the first-principles methods via density functional theory and Monte Carlo simulations, the magnetic hysteresis cycle has been plotted. Using the generalized gradient and GGA-PBE approximation in the full-potential linearized augmented plane wave (FP-LAPW) method, the exchange coupling interactions between magnetic elements and local magnetic moment were evaluated. Furthermore, the theoretical magnetic properties of MnFe2O4 were found to match the experimental ones. They both revealed that MnFe2O4 is a soft ferromagnetic material. The theoretical curve of magnetization versus temperature indicates that the transition occurred at Tc = 580.0 K. This was also in good agreement with the experimental Curie temperature. Full article
(This article belongs to the Special Issue Novel 2D Energy Materials and Devices)
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10 pages, 2194 KiB  
Article
Stability, Electronic Structure and Thermodynamic Properties of Nanostructured MgH2 Thin Films
by Omar Mounkachi, Asmae Akrouchi, Ghassane Tiouitchi, Marwan Lakhal, Elmehdi Salmani, Abdelilah Benyoussef, Abdelkader Kara, Abdellah El Kenz, Hamid Ez-Zahraouy and Amine El Moutaouakil
Energies 2021, 14(22), 7737; https://0-doi-org.brum.beds.ac.uk/10.3390/en14227737 - 18 Nov 2021
Cited by 6 | Viewed by 2145
Abstract
Magnesium is an attractive hydrogen storage candidate due to its high gravimetric and volumetric storage capacities (7.6 wt.% and 110 gH2/l, respectively). Unfortunately, its use as a storage material for hydrogen is hampered by the high stability of its hydride, its [...] Read more.
Magnesium is an attractive hydrogen storage candidate due to its high gravimetric and volumetric storage capacities (7.6 wt.% and 110 gH2/l, respectively). Unfortunately, its use as a storage material for hydrogen is hampered by the high stability of its hydride, its high dissociation temperature of 573–673 K and its slow reaction kinetics. In order to overcome those drawbacks, an important advancement toward controlling the enthalpy and desorption temperatures of nano-structured MgH2 thin films via stress/strain and size effects is presented in this paper, as the effect of the nano-structuring of the bulk added to a biaxial strain on the hydrogen storage properties has not been previously investigated. Our results show that the formation heat and decomposition temperature correlate with the thin film’s thickness and strain/stress effects. The instability created by decreasing the thickness of MgH2 thin films combined with the stress/strain effects induce a significant enhancement in the hydrogen storage properties of MgH2. Full article
(This article belongs to the Special Issue Novel 2D Energy Materials and Devices)
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Review

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20 pages, 2242 KiB  
Review
A Review on MoS2 Energy Applications: Recent Developments and Challenges
by Omnia Samy and Amine El Moutaouakil
Energies 2021, 14(15), 4586; https://0-doi-org.brum.beds.ac.uk/10.3390/en14154586 - 29 Jul 2021
Cited by 35 | Viewed by 4917
Abstract
Molybdenum disulfide (MoS2) is a promising transition metal dichalcogenide (TMD) that has exceptional electronic, magnetic, optical, and mechanical properties. It can be semiconducting, superconducting, or an insulator according to its polymorph. Its bandgap structure changes from indirect to direct when moving [...] Read more.
Molybdenum disulfide (MoS2) is a promising transition metal dichalcogenide (TMD) that has exceptional electronic, magnetic, optical, and mechanical properties. It can be semiconducting, superconducting, or an insulator according to its polymorph. Its bandgap structure changes from indirect to direct when moving towards its nanostructures, which opens a door to bandgap engineering for MoS2. Its supercapacitive and catalytic activity was recently noticed and studied, in order to include this material in a wide range of energy applications. In this work, we present MoS2 as a future material for energy storage and generation applications, especially solar cells, which are a cornerstone for a clean and abundant source of energy. Its role in water splitting reactions can be utilized for energy generation (hydrogen evolution) and water treatment at the same time. Although MoS2 seems to be a breakthrough in the energy field, it still faces some challenges regarding its structure stability, production scalability, and manufacturing costs. Full article
(This article belongs to the Special Issue Novel 2D Energy Materials and Devices)
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