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Advanced Materials for Solid Oxide Electrochemical Cells

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

Deadline for manuscript submissions: closed (10 July 2022) | Viewed by 2556

Special Issue Editors

Energy and Environment Science and technology, Idaho National Laboratory, Idaho Falls, ID, USA
Interests: density functional theory; machine learning; battery; electrolyzer; fuel cell; catalysis
Center for Fuel Cell Innovation, School of Materials Science and Engineering, Huazhong University of Science & Technology, Wuhan, China
Interests: fuel cells; solid oxide electrochemical cell; advanced materials; cell and stack degradation; microstructure evaluation

Special Issue Information

Dear Colleagues,

Solid oxide electrochemical cells are involved in a variety of important processes, such as H2 production and CO2 conversion. They are attractive because of unrivalled conversion efficiencies—a result of favorable thermodynamics and kinetics at higher operating temperatures. To obtain the high performance, it is important to design and synthesize materials with desirable structures and compositions based on a thorough understanding of the system. This Special Issue aims to address the materials development for solid oxide electrochemical cells, to explore recent progress in this exciting field, and to overcome the remaining hurdles towards commercialization.

We sincerely invite researchers to contribute to the Special Issue on Advanced Materials for Solid Oxide Electrochemical Cells. The potential topics include, but are not limited to:

  • Solid oxide electrochemical cells;
  • Advance materials development;
  • Surface modification technologies;
  • Composition optimization technologies;
  • Configuration design;
  • Theoretical calculations for electrode/electrolyte materials;
  • Robust materials for extreme operations;
  • Material degradation and evolution during operation.

Dr. Meng Li
Prof. Dr. Dong Yan
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. 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

  • solid oxide electrochemical cells
  • advanced materials
  • electrocatalysis
  • material computations/simulations
  • material characterization
  • material manufacturing

Published Papers (1 paper)

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Research

17 pages, 5186 KiB  
Article
Al-Doped SrMoO3 Perovskites as Promising Anode Materials in Solid Oxide Fuel Cells
by Vanessa Cascos, María Teresa Fernández-Díaz and José Antonio Alonso
Materials 2022, 15(11), 3819; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15113819 - 27 May 2022
Cited by 3 | Viewed by 2143
Abstract
Two perovskite materials with SrMo1−xAlxO3−δ (x = 0.1, 0.2) compositions have been synthesized by reduction from the corresponding scheelite phases, with SrMo1−xAlxO4−δ stoichiometry; the pertinent characterization shows that the defective perovskites [...] Read more.
Two perovskite materials with SrMo1−xAlxO3−δ (x = 0.1, 0.2) compositions have been synthesized by reduction from the corresponding scheelite phases, with SrMo1−xAlxO4−δ stoichiometry; the pertinent characterization shows that the defective perovskites can be used as anode materials in solid oxide fuel cells, providing maximum output power densities of 633 mW/cm2 for x = 0.2. To correlate structure and properties, a neutron powder diffraction investigation was carried out for both perovskite and scheelite phases. Both perovskites are cubic, defined in the Pm-3m space group, displaying a random distribution of Mo and Al cations over the 1a sites of the structure. The introduction of Al at Mo positions produced conspicuous amounts of oxygen vacancies in the perovskite, detected by neutrons. This is essential to induce ionic diffusion, providing a mixed ionic and electronic conduction (MIEC), since in MIEC electrodes, charge carriers are combined in one single phase and the ionic conductivity can be one order of magnitude higher than in a conventional material. The thermal expansion coefficients of the reduced and oxidized samples demonstrated that these materials perfectly match with the La0.8Sr0.2Ga0.83Mg0.17O3−δ electrolyte, La0.4Ce0.6O2−δ buffer layer and other components of the cell. Scanning electron microscopy after the test in a real solid oxide fuel cell showed a very dense electrolyte and porous electrodes, essential requirements for this type of fuel. SrMo1−xAlxO3−δ perovskites are, thus, a good replacement of conventional biphasic cermet anodes in solid oxide fuel cells. Full article
(This article belongs to the Special Issue Advanced Materials for Solid Oxide Electrochemical Cells)
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