Achieving fast oxygen diffusion in perovskites by cation ordering
TLDR
In this article, the authors showed that the oxygen diffusivity in Gd 0.5Ba0.5MnO3−δ can be enhanced by inducing crystallographic ordering among lanthanide and alkali-earth ions in the A-site sublattice.Abstract:
The oxygen-exchange behavior has been studied in half-doped manganese and cobalt perovskite oxides. We have found that the oxygen diffusivity in Gd0.5Ba0.5MnO3−δ can be enhanced by orders of magnitude by inducing crystallographic ordering among lanthanide and alkali-earth ions in the A-site sublattice. Transformation of a simple cubic perovskite, with randomly occupied A sites, into a layered crystal GdBaMn2O5+x (or isostructural GdBaCo2O5+x for cobalt oxide) with alternating lanthanide and alkali-earth planes reduces the oxygen bonding strength and provides disorder-free channels for ion motion, pointing to an efficient way to design new ionic conductors.read more
Citations
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Materials for Solid Oxide Fuel Cells
TL;DR: A short review of the types and properties of materials that have been considered for each of these components is presented with an emphasis on the requirements for operation at intermediate temperature (500−800 °C).
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A perspective on low-temperature solid oxide fuel cells
TL;DR: In this article, the authors provide a perspective on solid oxide fuel cells operating at low temperature, defined here to be the range from ∼400 °C to 650 °C, with a focus on materials that have demonstrated good properties and cell performance.
Journal ArticleDOI
Enhancing SOFC cathode performance by surface modification through infiltration
TL;DR: In this article, the authors reviewed recent progress in enhancing SOFC cathode performance by surface modification through a solution-based infiltration process, focusing on two backbone architectures, inherently functional and skeletal, infiltrated using wet-chemistry processes.
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Rapid oxygen ion diffusion and surface exchange kinetics in PrBaCo2O5+x with a perovskite related structure and ordered A cations
TL;DR: In this paper, the oxygen exchange kinetics of polycrystalline samples of the oxygen-deficient double perovskite PrBaCo2O5+x (PBCO) have been determined by electrical conductivity relaxation (ECR) and by oxygen-isotope exchange and depth profiling (IEDP).
Journal ArticleDOI
Synthesis, characterization and evaluation of cation-ordered LnBaCo2O5+δ as materials of oxygen permeation membranes and cathodes of SOFCs
TL;DR: In this article, a stable, cation-ordered oxides with layered lattice structures were obtained with medium-sized Ln 3+ ions over a wide range of oxygen partial pressures, a property essential for applications as oxygen separation membranes and solid oxide fuel cell cathodes.
References
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Materials for fuel-cell technologies
TL;DR: Recent progress in the search and development of innovative alternative materials in the development of fuel-cell stack is summarized.
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A high-performance cathode for the next generation of solid-oxide fuel cells
Zongping Shao,Sossina M. Haile +1 more
TL;DR: BSCF is presented as a new cathode material for reduced-temperature SOFC operation and demonstrated that BSCF is ideally suited to ‘single-chamber’ fuel-cell operation, where anode and cathode reactions take place within the same physical chamber.
Book
Science and Technology of Ceramic Fuel Cells
TL;DR: In this article, the authors provide a comprehensive treatise on solid oxide fuel cells and succeed in filling the gap in the market for a reference book in this field Directed towards scientists, engineers, and technical managers working with SOFCs as well as ceramic devices based on conducting materials, and in related fields, the book will also be invaluable as a textbook for science and engineering courses.
Journal ArticleDOI
Designing fast oxide-ion conductors based on La2Mo2O9
TL;DR: A family of solid oxides based on the parent compound La2Mo 2O9 (with a different crystal structure from all known oxide electrolytes) which exhibits fast oxide-ion conducting properties and is comparable to that of stabilized zirconia, the most widely used oxide electrolyte.
Journal ArticleDOI
Oxide-ion electrolytes
TL;DR: The performance of the oxide-ion electrolyte of a solid oxide fuel cell (SOFC) is critical to the development of an intermediate-temperature system as discussed by the authors, and there remains a strong motivation to search for new, improved oxide ion electrolytes.