Special Issue "Solid State Materials for Energy Applications"

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

Deadline for manuscript submissions: 31 May 2020.

Special Issue Editor

Dr. Cristina Flox
Website
Guest Editor
Department of Chemistry and Materials Science, School of Chemical Technology, Aalto University, Helsinki, Kemistintie 1, 02150 Espoo, Finland
Interests: solid-state electrolytes; energy storage; electrocatalyst; batteries; supercap; nanomaterials

Special Issue Information

Dear Colleagues,

All solid-state based systems will play a key role in the coming years in order to face the challenge of global warming and the depletion of fossil fuels. They can provide a solution for safe, lower toxicity, longer lifespan and higher energy density and, potentially cheaper solutions, overcoming the limitations of the current energy storage systems.

Therefore, this special issue is aimed at covering the present as well as the next generation of solid state devices in energy applications, bringing an overview based on materials, testing evaluation, cell design, modelling and simulation studies, costs, real application, or other contributions developed in the field. All authors with expertise in these topics are cordially invited to submit their manuscripts to the Materials. Noteworthy and highly original research papers and review articles covering the current state of the art are welcome.

This Special Issue is focused on the development of solid-state materials for energy storage and conversion devices, including, but not limited to, the following topics:

-Theoretical and modelling design of solid-state materials (ab initio and DFT calculation);

-Latest developments in solid-state materials for solid oxide fuel cell (SOFC), batteries, supercapacitors (including hydrogels)

-Solid state thermoelectric devices.

-New trends in the synthesis and processing as well as their structural and mechanical characterization in energy devices

-Cost analysis, life cycle assessment, and ageing testing

-Engineering, design, and scale-up of devices. -Identifying failure mechanisms as well as encapsulation methodologies

-Organic ionic plastic crystals for energy applications

Dr. Cristina Flox
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 papers will be 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 2000 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

  • nanomaterials
  • solid state electrolyte
  • energy applications
  • storage devices
  • ionic transportation mechanism
  • solid electrolyte/electrode interphases.

Published Papers (4 papers)

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Research

Open AccessArticle
Ab Initio Screening of Doped Mg(AlH4)2 Systems for Conversion-Type Lithium Storage
Materials 2019, 12(16), 2599; https://doi.org/10.3390/ma12162599 - 15 Aug 2019
Cited by 1
Abstract
In this work, we have explored the potential applications of pure and various doped Mg(AlH4)2 as Li-ion battery conversion electrode materials using density functional theory (DFT) calculations. Through the comparisons of the electrochemical specific capacity, the volume change, the average [...] Read more.
In this work, we have explored the potential applications of pure and various doped Mg(AlH4)2 as Li-ion battery conversion electrode materials using density functional theory (DFT) calculations. Through the comparisons of the electrochemical specific capacity, the volume change, the average voltage, and the electronic bandgap, the Li-doped material is found to have a smaller bandgap and lower average voltage than the pure system. The theoretical specific capacity of the Li-doped material is 2547.64 mAhg−1 with a volume change of 3.76% involving the electrode conversion reaction. The underlying reason for property improvement has been analyzed by calculating the electronic structures. The strong hybridization between Lis-state with H s-state influences the performance of the doped material. This theoretical research is proposed to help the design and modification of better light-metal hydride materials for Li-ion battery conversion electrode applications. Full article
(This article belongs to the Special Issue Solid State Materials for Energy Applications)
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Open AccessArticle
Design, Synthesis, Structure and Properties of Ba-Doped Derivatives of SrCo0.95Ru0.05O3−δ Perovskite as Cathode Materials for SOFCs
Materials 2019, 12(12), 1957; https://doi.org/10.3390/ma12121957 - 18 Jun 2019
Abstract
We have designed and prepared a novel cathode material for solid oxide fuel cell (SOFC) based on SrCo0.95Ru0.05O3−δ perovskite. We have partially replaced Sr by Ba in Sr0.9Ba0.1Co0.95Ru0.05O3−δ (SBCRO) [...] Read more.
We have designed and prepared a novel cathode material for solid oxide fuel cell (SOFC) based on SrCo0.95Ru0.05O3−δ perovskite. We have partially replaced Sr by Ba in Sr0.9Ba0.1Co0.95Ru0.05O3−δ (SBCRO) in order to expand the unit-cell size, thereby improving the ionic diffusion of O2− through the crystal lattice. The characterization of this new oxide has been studied at room temperature by X-ray diffraction (XRD) and neutron powder diffraction (NPD) experiments. At room temperature, SBCRO perovskite crystallizes in the P4/mmm tetragonal space group, as observed from NDP data. The maximum conductivity value of 18.6 S cm−1 is observed at 850 °C. Polarization resistance measurements on LSGM electrolyte demonstrate an improvement in conductivity with respect to the parent Sr-only perovskite cathode. A good chemical compatibility and an adequate thermal expansion coefficient make this oxide auspicious for using it as a cathode in SOFC. Full article
(This article belongs to the Special Issue Solid State Materials for Energy Applications)
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Open AccessArticle
Dual Oxygen Defects in Layered La1.2Sr0.8−xBaxInO4+δ (x = 0.2, 0.3) Oxide-Ion Conductors: A Neutron Diffraction Study
Materials 2019, 12(10), 1624; https://doi.org/10.3390/ma12101624 - 17 May 2019
Cited by 2
Abstract
The title compounds exhibit a K2NiF4-type layered perovskite structure; they are based on the La1.2Sr0.8InO4+δ oxide, which was found to exhibit excellent features as fast oxide-ion conductor via an interstitial oxygen mechanism. These new [...] Read more.
The title compounds exhibit a K2NiF4-type layered perovskite structure; they are based on the La1.2Sr0.8InO4+δ oxide, which was found to exhibit excellent features as fast oxide-ion conductor via an interstitial oxygen mechanism. These new Ba-containing materials were designed to present a more open framework to enhance oxygen conduction. The citrate-nitrate soft-chemistry technique was used to synthesize such structural perovskite-type materials, followed by annealing in air at moderate temperatures (1150 °C). The subtleties of their crystal structures were investigated from neutron powder diffraction (NPD) data. They crystallize in the orthorhombic Pbca space group. Interstitial O3 oxygen atoms were identified by difference Fourier maps in the NaCl layer of the K2NiF4 structure. At variance with the parent compound, conspicuous oxygen vacancies were found at the O2-type oxygen atoms for x = 0.2, corresponding to the axial positions of the InO6 octahedra. The short O2–O3 distances and the absence of steric impediments suggest a dual oxygen-interstitial mechanism for oxide-ion conduction in these materials. Conductivity measurements show that the activation energy values are comparable to those typical of ionic conductors working by simple vacancy mechanisms (~1 eV). The increment of the total conductivity for x = 0.2 can be due to the mixed mechanism driving both oxygen vacancies and interstitials, which is original for these potential electrolytes for solid-oxide fuel cells. Full article
(This article belongs to the Special Issue Solid State Materials for Energy Applications)
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Open AccessArticle
Micro-Segregated Liquid Crystal Haze Films for Photovoltaic Applications: A Novel Strategy to Fabricate Haze Films Employing Liquid Crystal Technology
Materials 2018, 11(11), 2188; https://doi.org/10.3390/ma11112188 - 05 Nov 2018
Abstract
Herein, a novel strategy to fabricate haze films employing liquid crystal (LC) technology for photovoltaic (PV) applications is reported. We fabricated a high optical haze film composed of low-molecular LCs and polymer and applied the film to improve the energy conversion efficiency of [...] Read more.
Herein, a novel strategy to fabricate haze films employing liquid crystal (LC) technology for photovoltaic (PV) applications is reported. We fabricated a high optical haze film composed of low-molecular LCs and polymer and applied the film to improve the energy conversion efficiency of PV module. The technique utilized to fabricate our haze film is based on spontaneous polymerization-induced phase separation between LCs and polymers. With optimized fabrication conditions, the haze film exhibited an optical haze value over 95% at 550 nm. By simply attaching our haze film onto the front surface of a silicon-based PV module, an overall average enhancement of 2.8% in power conversion efficiency was achieved in comparison with a PV module without our haze film. Full article
(This article belongs to the Special Issue Solid State Materials for Energy Applications)
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