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Functional Materials for Energy Conversion and Storage (Second Volume)
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Functional Materials for Energy Conversion and Storage (Second Volume)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Energy Materials".

Deadline for manuscript submissions: closed (10 February 2024) | Viewed by 4584

Special Issue Editor

Dr. Sima Aminorroaya Yamini

E-Mail Website
Guest Editor
Department of Engineering and Mathematics, Sheffield Hallam University, Sheffield S1 1 WB, UK
Interests: design, fabrication, and characterisation of functional materials for advanced manufacturing applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The world’s ever-growing demand for energy, as well as environmental concerns arising from traditional fossil fuel sources, have inspired intensive research to develop clean and sustainable energy sources, as well as saving and utilizing energy as efficiently as possible. The science of functional materials, where physics meets chemistry, has attracted a great deal of attention because of its versatile techniques to achieve these goals.

This issue will focus on functional materials with specific electrical, thermal, magnetic, chemical, or electrochemical properties as a foundation for designing and fabricating new, desired materials enabling high-performance energy storage and conversion devices.

Dr. Sima Aminorroaya Yamini
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. Materials 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

  • energy storage
  • energy harvesting
  • functional materials
  • advanced materials

Published Papers (4 papers)

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Research

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13 pages, 2863 KiB  
Article
The Effect of Copper–Graphene Composite Architecture on Thermal Transport Efficiency
by Arseny M. Kazakov, Galiia F. Korznikova, Ilyas I. Tuvalev, Artem A. Izosimov and Elena A. Korznikova
Materials 2023, 16(22), 7199; https://doi.org/10.3390/ma16227199 - 17 Nov 2023
Cited by 1 | Viewed by 848
Abstract
This paper presents the results of molecular dynamic modeling, revealing that inserting confined graphene layers into copper crystal reduces the thermal conductivity of the whole composite, and the coefficient of thermal conductivity κ decreases upon an increase in the number of graphene layers. [...] Read more.
This paper presents the results of molecular dynamic modeling, revealing that inserting confined graphene layers into copper crystal reduces the thermal conductivity of the whole composite, and the coefficient of thermal conductivity κ decreases upon an increase in the number of graphene layers. The injection of one, two, and three layers of 15 nm graphene leads to a change in the coefficient of thermal conductivity from 380 W/(m·K) down to 205.9, 179.1, and 163.6 W/(m·K), respectively. Decreasing the length of graphene layers leads to a decrease in the density of defects on which heat is dissipated. With one, two, and three layers of 8 nm graphene, the coefficient of thermal conductivity of the composite is equal to 272.6, 246.8, and 240.8 W/(m·K), appropriately. Meanwhile the introduction of an infinite graphene layer results in the growth of κ to 414.2–803.3 W/(m·K). Full article
(This article belongs to the Special Issue Functional Materials for Energy Conversion and Storage (Second Volume))
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9 pages, 2037 KiB  
Article
The Synthesis and Thermoelectric Properties of the n-Type Solid Solution Bi2−xSbxTe3 (x < 1)
by Amélie Galodé, Tristan Barbier and Franck Gascoin
Materials 2023, 16(17), 5941; https://doi.org/10.3390/ma16175941 - 30 Aug 2023
Viewed by 713
Abstract
Commercial Peltier cooling devices and thermoelectric generators mostly use bismuth telluride-based materials, specifically its alloys with Sb2Te3 for the p-type legs and its alloys with Bi2Se3 for the n-type legs. If the p-type materials perform with zT [...] Read more.
Commercial Peltier cooling devices and thermoelectric generators mostly use bismuth telluride-based materials, specifically its alloys with Sb2Te3 for the p-type legs and its alloys with Bi2Se3 for the n-type legs. If the p-type materials perform with zT well above the unity around room temperature, the n-type counterpart is lacking efficiency in this temperature range, and has the disadvantage of containing selenium. Indeed, despite the fact that selenium is not environmentally benign and that its handling requires precautions, the use of selenium does not facilitate the optimization of thermoelectric performance at or around room temperature, as the presence of selenium results in a larger band gap. In this study, we investigate the feasibility of a selenium-free n-type (Bi, Sb)2Te3 using a simple two-step process: mechanical alloying synthesis followed by spark plasma sintering. All the members of the solid solution Bi2−xSbxTe3 with x < 1 are n-type materials, with zTs between 0.35 and 0.6. The zT is maximized at lower temperatures with an increasing Sb content, which is proof that the band gap is reduced accordingly. We also show here that an edge-free sintering process considerably improves thermoelectric performance. Full article
(This article belongs to the Special Issue Functional Materials for Energy Conversion and Storage (Second Volume))
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9 pages, 6429 KiB  
Article
Thermoelectric Properties of n-Type Bi4O4SeX2 (X = Cl, Br)
by Tao Wang, Wanghua Hu, Zhefeng Lou, Zhuokai Xu, Xiaohui Yang, Tian Le, Jialu Wang and Xiao Lin
Materials 2023, 16(12), 4329; https://doi.org/10.3390/ma16124329 - 12 Jun 2023
Cited by 1 | Viewed by 947
Abstract
The multiple anion superlattice Bi4O4SeCl2 has been reported to exhibit extremely low thermal conductivity along the stacking c-axis, making it a promising material for thermoelectric applications. In this study, we investigate the thermoelectric properties of Bi4 [...] Read more.
The multiple anion superlattice Bi4O4SeCl2 has been reported to exhibit extremely low thermal conductivity along the stacking c-axis, making it a promising material for thermoelectric applications. In this study, we investigate the thermoelectric properties of Bi4O4SeX2 (X = Cl, Br) polycrystalline ceramics with different electron concentrations by adjusting the stoichiometry. Despite optimizing the electric transport, the thermal conductivity remained ultra-low and approached the Ioffe–Regel limit at high temperatures. Notably, our findings demonstrate that non-stoichiometric tuning is a promising approach for enhancing the thermoelectric performance of Bi4O4SeX2 by refining its electric transport, resulting in a figure of merit of up to 0.16 at 770 K. Full article
(This article belongs to the Special Issue Functional Materials for Energy Conversion and Storage (Second Volume))
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Review

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43 pages, 23940 KiB  
Review
State of the Art in Development of Heat Exchanger Geometry Optimization and Different Storage Bed Designs of a Metal Hydride Reactor
by Viktor Kudiiarov, Roman Elman, Natalia Pushilina and Nikita Kurdyumov
Materials 2023, 16(13), 4891; https://doi.org/10.3390/ma16134891 - 07 Jul 2023
Cited by 4 | Viewed by 1693
Abstract
The efficient operation of a metal hydride reactor depends on the hydrogen sorption and desorption reaction rate. In this regard, special attention is paid to heat management solutions when designing metal hydride hydrogen storage systems. One of the effective solutions for improving the [...] Read more.
The efficient operation of a metal hydride reactor depends on the hydrogen sorption and desorption reaction rate. In this regard, special attention is paid to heat management solutions when designing metal hydride hydrogen storage systems. One of the effective solutions for improving the heat and mass transfer effect in metal hydride beds is the use of heat exchangers. The design of modern cylindrical-shaped reactors makes it possible to optimize the number of heat exchange elements, design of fins and cooling tubes, filter arrangement and geometrical distribution of metal hydride bed elements. Thus, the development of a metal hydride reactor design with optimal weight and size characteristics, taking into account the efficiency of heat transfer and metal hydride bed design, is the relevant task. This paper discusses the influence of different configurations of heat exchangers and metal hydride bed for modern solid-state hydrogen storage systems. The main advantages and disadvantages of various configurations are considered in terms of heat transfer as well as weight and size characteristics. A comparative analysis of the heat exchangers, fins and other solutions efficiency has been performed, which makes it possible to summarize and facilitate the choice of the reactor configuration in the future. Full article
(This article belongs to the Special Issue Functional Materials for Energy Conversion and Storage (Second Volume))
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