Synthesis and electrochemical properties of (Pr-Nd)1-ySryMnO3-δ and (Pr1-xNdx)0.7Sr0.3MnO3-δ as cathode materials for IT-SOFC

Mingfei Liu, Dehua Dong, Lei Chen, Jianfeng Gao, Xingqin Liu, Guangyao Meng

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23 Citations (Scopus)

Abstract

(Pr-Nd)1-ySryMnO3-δ (P-NSM, y = 0.2, 0.25, 0.3, 0.35) powders made from commercial Pr-Nd mixed oxide, as well as (Pr1-xNdx)0.7Sr0.3MnO3-δ (PN3SM, x = 0, 0.5, 0.7, 1) were synthesized by a glycine-nitrate process and characterized as cathode materials for intermediate temperature solid oxide fuel cell (IT-SOFC). XRD patterns showed the powders had formed pure perovskite phase after being calcined at 800 °C for 2 h. (Pr-Nd)0.7Sr0.3MnO3-δ (P-N3SM) achieved a high conductivity of 194 S cm-1 at 500 °C and showed a good chemical stability against YSZ at 1150 °C. And the thermal expansion coefficient of P-N3SM/YSZ cathode was 11.1 × 10-6 K-1, which well matched YSZ electrolyte film. The tubular SOFC with P-N3SM/YSZ cathode exhibited the maximum power densities of 415, 367, 327 and 282 mW cm-2 at 850, 800, 750 and 700 °C, respectively, which indicated P-N3SM was potentially applied in SOFC for low cost.

Original languageEnglish
Pages (from-to)107-111
Number of pages5
JournalJournal of Power Sources
Volume176
Issue number1
DOIs
Publication statusPublished - 21 Jan 2008
Externally publishedYes

Keywords

  • Cathode
  • Perovskite
  • Pr-Nd mixed oxides
  • Solid oxide fuel cell
  • Tubular

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