Special Issue "Proton Conducting Solid Oxide Fuel Cells"

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemistry".

Deadline for manuscript submissions: 28 February 2021.

Special Issue Editor

Dr. Liliya Dunyushkina
Website
Guest Editor
Institute of High Temperature Electrochemistry, 20 Akademicheskaya St, 620990 Ekaterinburg, Russia
Interests: transport properties of ionic systems; dynamics of interface processes; electrochemical generation of energy; optimization of electrolyte and electrode materials; chemical solution deposition of solid-oxide films; study of regularities and correlations in microstructure and transport properties of film solid-oxide electrolytes

Special Issue Information

Dear Colleagues,

Solid Oxide Fuel Cells (SOFCs) are efficient energy conversion devices that convert the chemical energy of a fuel into electricity via electrochemical reactions. Most of the challenges hindering SOFC commercialization arise from their high operating temperature (above 750 °C). At present, the reduction in operating temperatures to an intermediate temperature (IT) range (400–700 °C) is the main task for SOFC development. Consequently, proton-conducting oxides have attracted widespread interest as electrolyte materials, alternative to traditional oxygen ion conductors, for use in IT-SOFCs, due to their low activation energy and sufficiently high ionic conductivity.

In the few last decades, many efforts have been made to investigate electrolyte and electrode materials for proton-conducting SOFCs. Great research efforts have been focused on the fabrication and study of the electrochemical performance of proton-conducting SOFCs with different configurations (electrode-, electrolyte-, or metal-supported cells). Despite the impressive progress that has been achieved, significant challenges remain, especially with respect to minimizing the material interaction, the reduction in polarization losses, and the increase in cell durability, among others.
The Special Issue of Applied Sciences “Proton Conducting Solid Oxide Fuel Cells” aims to cover recent advances and new trends in the development of materials for different cell components and their processing and performance, the design, fabrication and testing of cells, cell performance modeling, and related activities in the field of the proton-conducting SOFCs.

Dr. Liliya Dunyushkina
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. Applied Sciences 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 1800 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

  • proton-conducting SOFC
  • proton-conducting electrolyte
  • IT-SOFC electrodes
  • IT-SOFC performance
  • proton-conducting SOFC design

Published Papers (3 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Open AccessFeature PaperArticle
Features of Electrophoretic Deposition of a Ba-Containing Thin-Film Proton-Conducting Electrolyte on a Porous Cathode Substrate
Appl. Sci. 2020, 10(18), 6535; https://doi.org/10.3390/app10186535 - 18 Sep 2020
Abstract
This paper presents the study of electrophoretic deposition (EPD) of a proton-conducting electrolyte of BaCe0.89Gd0.1Cu0.01O3-δ (BCGCuO) on porous cathode substrates of LaNi0.6Fe0.4O3−δ (LNFO) and La1.7Ba0.3NiO4+δ (LBNO). [...] Read more.
This paper presents the study of electrophoretic deposition (EPD) of a proton-conducting electrolyte of BaCe0.89Gd0.1Cu0.01O3-δ (BCGCuO) on porous cathode substrates of LaNi0.6Fe0.4O3−δ (LNFO) and La1.7Ba0.3NiO4+δ (LBNO). EPD kinetics was studied in the process of deposition of both a LBNO sublayer on the porous LNFO substrate and a BCGCuO electrolyte layer. Addition of iodine was shown to significantly increase the deposited film weight and decrease the number of EPD cycles. During the deposition on the LNFO cathode, Ba preservation in the electrolyte layer after sintering at 1450 °C was achieved only with a film thickness greater than 20 μm. The presence of a thin LBNO sublayer (10 μm) did not have a pronounced effect on the preservation of Ba in the electrolyte layer. When using the bulk LBNO cathode substrate as a Ba source, Ba was retained in a nominal amount in the BCGCuO film with a thickness of 10 μm. The film obtained on the bulk LBNO substrate, being in composition close to the nominal composition of the BCGCuO electrolyte, possessed the highest electrical conductivity among the films deposited on the various cathode substrates. The technology developed is a base step in the adaptation of the EPD method for fabrication of cathode-supported Solid Oxide Fuel Cells (SOFCs) with dense barium-containing electrolyte films while maintaining their nominal composition and functional characteristics. Full article
(This article belongs to the Special Issue Proton Conducting Solid Oxide Fuel Cells)
Show Figures

Figure 1

Open AccessFeature PaperCommunication
One-Step Fabrication of Protonic Ceramic Fuel Cells Using a Convenient Tape Calendering Method
Appl. Sci. 2020, 10(7), 2481; https://doi.org/10.3390/app10072481 - 04 Apr 2020
Cited by 1
Abstract
The present paper reports the preparation of multilayer protonic ceramic fuel cells (PCFCs) using a single sintering step. The success of this fabrication approach is due to two main factors: the rational choice of chemically and mechanically compatible components, as well as the [...] Read more.
The present paper reports the preparation of multilayer protonic ceramic fuel cells (PCFCs) using a single sintering step. The success of this fabrication approach is due to two main factors: the rational choice of chemically and mechanically compatible components, as well as the selection of a convenient preparation (tape calendering) method. The PCFCs prepared in this manner consisted of a 30 µm BaCe0.5Zr0.3Dy0.2O3–δ (BCZD) electrolyte layer, a 500 μm Ni–BCZD supporting electrode layer and a 20 μm functional Pr1.9Ba0.1NiO4+δ (PBN)–BCZD cathode layer. These layers were jointly co-fired at 1350 °C for 5 h to reach excellent gas-tightness of the electrolyte and porous structures for the supported and functional electrodes. The adequate fuel cell performance of this PCFC design (400 mW cm−2 at 600 °C) demonstrates that the tape calendering method compares well with such conventional laboratory PCFC preparation techniques such as co-pressing and tape-casting. Full article
(This article belongs to the Special Issue Proton Conducting Solid Oxide Fuel Cells)
Show Figures

Graphical abstract

Open AccessFeature PaperArticle
Transport Properties of Film and Bulk Sr0.98Zr0.95Y0.05O3−δ Membranes
Appl. Sci. 2020, 10(7), 2229; https://doi.org/10.3390/app10072229 - 25 Mar 2020
Abstract
In electrode-supported solid oxide fuel cells (SOFCs) with a thin electrolyte, the electrolyte performance can be affected by its interaction with the electrode, therefore, it is particularly important to study the charge transport properties of thin electrode-supported electrolytes. The transport numbers of charged [...] Read more.
In electrode-supported solid oxide fuel cells (SOFCs) with a thin electrolyte, the electrolyte performance can be affected by its interaction with the electrode, therefore, it is particularly important to study the charge transport properties of thin electrode-supported electrolytes. The transport numbers of charged species in Ni-cermet supported Sr0.98Zr0.95Y0.05O3−δ (SZY) membranes were studied and compared to those of the bulk membrane. SZY films of 2.5 μm thickness were fabricated by the chemical solution deposition technique. It was shown that the surface layer of the films contained 1.5–2 at.% Ni due to Ni diffusion from the substrate. The Ni-cermet supported 2.5 μm-thick membrane operating in the fuel cell mode was found to possess the effective transport number of oxygen ions of 0.97 at 550 °C, close to that for the bulk SZY membrane (0.99). The high ionic transport numbers indicate that diffusional interaction between SZY films and Ni-cermet supporting electrodes does not entail electrolyte degradation. The relationship between SZY conductivity and oxygen partial pressure was derived from the data on effective conductivity and ionic transport numbers for the membrane operating under two different oxygen partial pressure gradients—in air/argon and air/hydrogen concentration cells. Full article
(This article belongs to the Special Issue Proton Conducting Solid Oxide Fuel Cells)
Show Figures

Figure 1

Back to TopTop