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Related Concept Videos

Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Related Experiment Video

Updated: Dec 31, 2025

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
15:08

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

Published on: September 20, 2012

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An Anisotropic Microstructure Evolution in a Solid Oxide Fuel Cell Anode.

Grzegorz Brus1, Hiroshi Iwai2, Janusz S Szmyd3

  • 1Department of Fundamental Research in Energy Engineering, AGH University of Science and Technology, 30 Mickiewicza Ave., Krakow, 30-059, Poland. brus@agh.edu.pl.

Nanoscale Research Letters
|January 5, 2020
PubMed
Summary
This summary is machine-generated.

Long-term solid oxide fuel cell operation causes significant anisotropic changes in anode microstructure, affecting electron and gas transport. These findings are vital for accurate fuel cell simulations.

Keywords:
Fuel cellsMicrostructureNanotomographyTortuosity

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Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems
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Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems
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Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Chemical Engineering

Background:

  • Solid oxide fuel cells (SOFCs) are advanced energy conversion devices.
  • Anode material degradation impacts SOFC performance and longevity.
  • Understanding microstructural evolution is key to improving SOFC durability.

Purpose of the Study:

  • To investigate the long-term operational effects on SOFC anode microstructure.
  • To quantify anisotropic changes in anode material phases.
  • To assess the impact of microstructural evolution on transport phenomena.

Main Methods:

  • Utilized electron nanotomography to visualize anode microstructure before and after aging.
  • Estimated microstructural parameters from 3D digital representations.
  • Analyzed changes in nickel, pore, and yttria-stabilized zirconia phases.

Main Results:

  • Observed substantial anisotropic changes in nickel and pore phases after 3800 hours of operation.
  • Yttria-stabilized zirconia phase remained isotropic.
  • Anode material transitioned from isotropic to anisotropic properties.
  • Microscale changes significantly impacted electron and gas transport.

Conclusions:

  • Long-term SOFC operation induces significant anode anisotropy.
  • Anisotropic transport phenomena must be considered in numerical simulations.
  • Homogeneous models need to incorporate microstructural anisotropy for accuracy, especially with post-operational data.