Properties of La2-xPrxNiO4 cathode for intermediate-temperature solid oxide fuel cells

Shunsuke Nishimoto, Suguru Takahashi, Yoshikazu Kameshima, Motohide Matsuda, Michihiro Miyake

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A series of K2NiF4-type compounds, La 2-xPrxNiO4 (x = 0, 0.6, 1.0, 1.4, and 2.0), were synthesized by solid state reaction for use as cathodes in an intermediate-temperature (500700° C) solid oxide fuel cell (IT-SOFC). La2-xPrxNiO4 (x = 0 and 0.6) crystallize in the Fmmm space group, while La2-xPrxNiO4 (x = 1.0, 1.4, and 2.0) belong to the Bmab space group. The electrical conductivity increased by Pr doping and La2-xPrxNiO4 (x = 0.6, 1.0, and 1.4) exhibited electrical conductivities similar to one another while Pr2NiO4 had the highest. Single test-cells consisting of samarium oxide doped ceria (SDC) as an electrolyte, NiSDC cermet as an anode and La2-xPrxNiO4 as a cathode, were fabricated for measurements of cell performance at 500700° C. Current interruption measurements revealed that the overpotential losses mainly decreased with increasing Pr content. Pr2NiO4 was found to exhibit the best cathode characteristics; maximum test-cell power densities of 14.1, 45.1, and 104.4mW/cm2 were obtained at 500, 600, and 700°C, respectively.

Original languageEnglish
Pages (from-to)246-250
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume119
Issue number1387
DOIs
Publication statusPublished - Mar 2011

Keywords

  • Catalytic activity
  • Cathode
  • Electrical conductivity
  • IT-SOFC

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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