Solid Oxide Fuel Cell Cathodes: Importance
of Chemical Composition and Morphology

• Authors: Vladislav A. Sadykov , Vitaliy S. Muzykantov , Nikita F. Yeremeev , Vladimir V. Pelipenko , Ekaterina M. Sadovskaya , Alexey S. Bobin , Yulia E. Fedorova , Daiana G. Amanbaeva , Alevtina L. Smirnova
• Languages of publication: EN

Abstracts

EN

The main aspects of the cathode materials
morphology for Intermediate Temperature Solid Oxide Fuel
Cells (IT SOFC) are considered in this paper. The approaches
for estimation of their basic properties, e.g. oxygen mobility
and surface reactivity, are described and the results
of different techniques (e.g. weight and conductivity
relaxation, oxygen isotope exchange) application for studies
of powders and dense ceramic materials are compared.
The Ruddlesden-Popper type phases (e.g. Pr2NiO4) provide
enhanced oxygen mobility due to cooperative mechanism
of oxygen interstitial migration. For perovskites, the oxygen
mobility is increased by doping, which generates oxygen
vacancies or decreases metal-oxygen bond strength. Nonadditive
increasing of the oxygen diffusion coefficients
found that for perovskite-fluorite nanocomposites, it can be
explained by the fast oxygen migration along perovskitefluorite
interfaces. Functionally graded nanocomposite
cathodes provide the highest power density, the lowest
area specific polarization resistance, and the best stability
to degradation caused by the surface layer carbonization/
hydroxylation, thus being the most promising for thin film
IT SOFC design.

Keywords

EN

SOFC; Cathodes; Perovskites; Fluorites; Composites; Isotope exchange; Relaxation studies; Oxygen mobility; Power density

• Publisher: De Gruyter Open
• Journal: Catalysis for Sustainable Energy
• Year: 2014
• Volume: 2
• Issue: 1

Dates

accepted

25 - 10 - 2015

received

31 - 12 - 2014

online

31 - 12 - 2015

Contributors

author

Vladislav A. Sadykov

• Boreskov Institute of Catalysis, 630090 Novosibirsk,
  Russian Federation
• Novosibirsk State University, 630090
  Novosibirsk, Russian Federation

author

Vitaliy S. Muzykantov

• Boreskov Institute of Catalysis, 630090 Novosibirsk,
  Russian Federation

author

Nikita F. Yeremeev

• Boreskov Institute of Catalysis, 630090 Novosibirsk,
  Russian Federation

author

Vladimir V. Pelipenko

• Boreskov Institute of Catalysis, 630090 Novosibirsk,
  Russian Federation

author

Ekaterina M. Sadovskaya

• Boreskov Institute of Catalysis, 630090 Novosibirsk,
  Russian Federation

author

Alexey S. Bobin

• Boreskov Institute of Catalysis, 630090 Novosibirsk,
  Russian Federation

author

Yulia E. Fedorova

• Novosibirsk State Pedagogical University, 630126
  Novosibirsk, Russian Federation

author

Daiana G. Amanbaeva

• Novosibirsk State Technical University,
  630073 Novosibirsk, Russian Federation

author

Alevtina L. Smirnova

• South Dakota School of Mines & Technology,
  SD 57701, Rapid City, USA

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Identifiers

DOI

10.1515/cse-2015-0004