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Portrait of Reine Wallenberg. Photo: Kennet Ruona

Reine Wallenberg

Professor, Coordinator Materials Science

Portrait of Reine Wallenberg. Photo: Kennet Ruona

Effect of impurities on structural and electrochemical properties of the Ni-YSZ interface.

Author

  • K V Jensen
  • Reine Wallenberg
  • I Chorkendorff
  • M Mogensen

Summary, in English

The changes in interface structure and chemical composition of a 99.995% pure nickel/yttria-stabilised zirconia (YSZ) interface were examined after heat treatment at 1000 °C in 97% H2/3% H2O with and without polarisation. Impedance spectroscopy was used for electrochemical characterisation. The results were compared to earlier investigations of a less pure nickel/YSZ interface.



The pure interface developed different structures depending on whether or not the samples were polarised. Despite the purity of the nickel, impurities were found in the interfacial region. The pure electrodes/interfaces showed area specific polarisation resistances 10 times lower than the impure interfaces.

Department/s

  • Centre for Analysis and Synthesis

Publishing year

2003

Language

English

Pages

27-37

Publication/Series

Solid State Ionics

Volume

160

Issue

1-2

Document type

Journal article

Publisher

Elsevier

Topic

  • Chemical Sciences

Keywords

  • Foreign phases
  • Polarisation resistance
  • Ni–YSZ interface
  • SOFC
  • Anode

Status

Published

ISBN/ISSN/Other

  • ISSN: 0167-2738