Simple solid oxide fuel cells

Bin Lin, Songlin Wang, Xingqin Liu*, Guangyao Meng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

A new concept of solid oxide fuel cells (SOFCs), the simple SOFCs, that is simply composed of an electronic conductor and an ionic conductor is investigated, which evidently simplifies the assembly and further maintenance of the cell system. High-performance interconnect material chromium deficient lanthanum calcium chromites La0.7Ca0.3Cr0.97O3-δ (LCC97) perovskite oxides are prepared by a modified Pechini method and examined as both anode and cathode materials for SOFCs based on the state-of-the-art YSZ electrolyte. Chemical compatibility, sintering character, electrical conductivity and thermal expansion are investigated to characterize the compatibilities of LCC97 with YSZ. The XRD analysis indicates LCC97 chemically compatible with YSZ. The LCC97 sintered at 1250 °C have the conductivity of 62.0 S cm-1 at 850 °C in air, which is about 2.6 times as high as that of La0.7Ca0.3CrO3-δ with no chromium deficiency. At 850 °C, the ASRs is only 0.15 Ω cm2 for LCC97-YSZ composite cathode. LCC97-based simple SOFCs (LCC97-YSZ/YSZ/LCC97-YSZ) offer promising performance using H2 as fuel and thick YSZ electrolytes. An open-circuit potential of 1.06 V, a maximum power density of 92.1 mW cm-2, and a polarization resistance of the electrodes of 2.17 Ω cm2 are achieved at 850 °C.

Original languageEnglish (US)
Pages (from-to)214-222
Number of pages9
JournalJournal of Alloys and Compounds
Volume490
Issue number1-2
DOIs
StatePublished - Feb 4 2010
Externally publishedYes

Keywords

  • Anode
  • Cathode
  • Interconnect
  • Simple solid oxide fuel cell

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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