Journal ArticleDOI
Colossal Ionic Conductivity at Interfaces of Epitaxial ZrO2:Y2O3/SrTiO3 Heterostructures
Javier Garcia-Barriocanal,Alberto Rivera-Calzada,Maria Varela,Zouhair Sefrioui,Enrique Iborra,Carlos León,Stephen J. Pennycook,Jacobo Santamaria +7 more
TLDR
It is proposed that the atomic reconstruction at the interface between highly dissimilar structures (such as fluorite and perovskite) provides both a large number of carriers and a high-mobility plane, yielding colossal values of the ionic conductivity.Abstract:
The search for electrolyte materials with high oxygen conductivities is a key step toward reducing the operation temperature of fuel cells, which is currently above 700 degrees C. We report a high lateral ionic conductivity, showing up to eight orders of magnitude enhancement near room temperature, in yttria-stabilized zirconia (YSZ)/strontium titanate epitaxial heterostructures. The enhancement of the conductivity is observed, along with a YSZ layer thickness-independent conductance, showing that it is an interface process. We propose that the atomic reconstruction at the interface between highly dissimilar structures (such as fluorite and perovskite) provides both a large number of carriers and a high-mobility plane, yielding colossal values of the ionic conductivity.read more
Citations
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Oxide-ion and proton conducting electrolyte materials for clean energy applications: structural and mechanistic features
TL;DR: This critical review presents an overview of the various classes of oxide materials exhibiting fast oxide-ion or proton conductivity for use as solid electrolytes in clean energy applications such as solid oxide fuel cells.
Journal ArticleDOI
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
A review of high temperature co-electrolysis of H2O and CO2 to produce sustainable fuels using solid oxide electrolysis cells (SOECs): advanced materials and technology
TL;DR: Insight into CO2 electrochemical conversions, solid oxide cell material behaviors and degradation mechanisms are highlighted to obtain a better understanding of the high temperature electrolysis process in SOECs.
Journal ArticleDOI
Review on microfabricated micro-solid oxide fuel cell membranes
TL;DR: In this article, the current status of development of micro-fabricated micro-solid oxide fuel cell membranes for power delivery is discussed and compared along with their microstructures.
Journal ArticleDOI
Oxygen diffusion in solid oxide fuel cell cathode and electrolyte materials: mechanistic insights from atomistic simulations
Alexander Chroneos,Alexander Chroneos,Bilge Yildiz,Albert Tarancón,David Parfitt,John A. Kilner +5 more
TL;DR: In this article, the authors illustrate the important role of modeling and simulations in providing direct atomic scale insights on the oxygen ion transport mechanisms and conduction properties in the cathode and electrolyte materials, and accelerate the progress from old materials to new concepts.
References
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Journal ArticleDOI
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.
Journal ArticleDOI
The ‘universal’ dielectric response
TL;DR: A review of dielectric data for a wide range of solids proves the existence of a remarkable "universality" of frequency and time responses which is essentially incompatible with the multiplicity of currently accepted detailed interpretations as discussed by the authors.
Book
The universal dielectric response
TL;DR: In this article, a brief description is given of the various manifestations of the universal fractional power law relaxation processes, which are contrasted with the classical or Debye law, and a novel very general approach based on the so-called energy criterion is introduced.
Journal ArticleDOI
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.
Journal ArticleDOI
Solid oxide fuel cells
TL;DR: In this article, the authors discuss the particular issues facing the development of a high temperature solid-state fuel cell and the inorganic materials currently used and under investigation for such cells, together with the problems associated with operating SOFCs on practical hydrocarbon fuels.
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