Stable and easily sintered (Pr0.5Nd0.5) 0.7Ca0.3CrO3-δ/Sm0.2Ce 0.8O1.9 composite interconnect materials for IT-solid oxide fuel cells

Yanzhi Ding, Xiaoyong Lu, Yonghong Chen, Lin Bin, Xingqin Liu*, Guangyao Meng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

(Pr0.5Nd0.5)0.7Ca0.3CrO 3-δ (PNCC) interconnect materials are stable in SOFC operating conditions. To improve the sintering ability and electrical conductivity of PNCC, a composite of PNCC/SDC interconnect materials was synthesized by a sol-gel auto-ignition process. The XRD results indicate that PNCC is chemically stable against reaction with SDC at high temperatures. Additionally, SDC-doped PNCC has enhanced sintering activity and electrical conductivity compared to PNCC alone. For 5 wt.% SDC, the relative density of the sample was 95.8% after sintering at 1400 °C, and the electrical conductivity of the sample reached 59.6 S cm-1 in air and 4.48 S cm-1 in H2 at 650 °C. Both of these values are higher than those of pure PNCC. The average thermal expansion coefficient of the samples is close to that of other components of SOFCs. Our results indicate that PNCC/SDC composites are promising intermediate materials for IT-SOFCs.

Original languageEnglish (US)
Pages (from-to)2075-2079
Number of pages5
JournalJournal of Power Sources
Volume196
Issue number4
DOIs
StatePublished - Feb 15 2011

Keywords

  • (PrNd)CaCrO
  • Interconnect materials
  • Sintering ability
  • SmCeO
  • Stability

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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