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Formation of nickel nanoparticles in nickel – ceramic anodes during operation of solid-oxide fuel cells

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Published/Copyright: May 23, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 5

Abstract

The microstructure of solid-oxide fuel cell anodes, consisting of nickel particles embedded in either doped zirconia or ceria, was characterized in three different stages: (i) as sintered, (ii) after reduction, and (iii) after fuel cell operation for 500 h in an atmosphere of moist hydrogen. After 500 h of operation, we found that both types of anodes, those based on zirconia and those based on ceria, contained nanoparticles of elemental nickel. We propose that these nanoparticles form from nickel hydroxide, synthesized during fuel cell operation and precipitating elemental nickel where the partial pressure of water is low at the periphery of triple-phase boundaries or on cooling down from the operating temperature to room temperature.

Keywords: Solid-oxide fuel cells; Ni nanoparticles; Scanning electron microscopy; X-ray energy-dispersive spectroscopy
* Correspondence address, Prof. Frank Ernst, Department of Materials Science and Engineering, Case Western Reserve University 10900 Euclid Avenue, Cleveland, Ohio 44106-7204, USA Tel.: +1 216 368 0611E-mail:

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Received: 2007-11-21
Accepted: 2008-2-5
Published Online: 2013-05-23
Published in Print: 2008-05-01

© 2008, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.101663
Keywords for this article
Solid-oxide fuel cells; Ni nanoparticles; Scanning electron microscopy; X-ray energy-dispersive spectroscopy

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Prof. Dr. Reiner Kirchheim
  5. Review
  6. Laser-assisted atom probe tomography and nanosciences
  7. Heusler films and multilayers: X-ray resonant magnetic scattering and polarized neutron reflectivity studies on the relation between structure and magnetism
  8. Perovskite-type hydrides – synthesis, structures and properties
  9. Basic
  10. Interface width of immiscible layered elements
  11. The decomposition reaction of lithium amide studied by anelastic spectroscopy and thermogravimetry
  12. Migration of faceted high-angle grain boundaries in Zn
  13. EELS analysis of internal metal – oxide interfaces
  14. Effect of Chemical Confinement on the mechanical relaxation spectra of poly(ethene-co-methacrylic acid) copolymers
  15. Applied
  16. Properties of hydrogen absorption by nano-structured FeTi alloys
  17. A subnanoscale study of the nucleation, growth, and coarsening kinetics of Cu-rich precipitates in a multicomponent Fe – Cu based steel
  18. Hydrogen absorption in 3.1 nanometre sized palladium samples: does structure matter?
  19. Ultrasonic study of short-range hydrogen ordering in Pd-hydride
  20. Homogeneity of mechanically alloyed nano-crystalline Fe – Cu-powders
  21. Formation of nickel nanoparticles in nickel – ceramic anodes during operation of solid-oxide fuel cells
  22. Characterisation of complex hydrides synthesised or modified by ball milling
  23. On the small scale character of the stress and hydrogen concentration fields at the tip of an axial crack in steel pipeline: effect of hydrogen-induced softening on void growth
  24. Notifications
  25. DGM News
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