Electrochemical Study of Symmetrical Intermediate Temperature - Solid Oxide Fuel Cells based on La0.6Sr0.4MnO3 / Ce0.9Gd0.1O1.95 for Operation in Direct Methane / Air

Caterina Sanna, Enrico Squizzato, Paola Costamagna*, Peter Holtappels, Antonella Glisenti

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

16 Downloads (Pure)

Abstract

La0.6Sr0.4MnO3 (LSM), which is considered a state-of-the-art solid oxide fuel cell (SOFC) cathode, is investigated for application as an anode in direct methane intermediate temperature - solid oxide fuel cells (IT-SOFCs). Ce0.9Gd0.1O1.95 (CGO) is used as the electrolyte. The characterized electrode is a composite LSM/CGO, prepared in two different configurations: LSM crushed electrospun nanofibers / GDC powders, and LSM powders / GDC powders. The electrodes are tested in both air and direct methane conditions. At 815°C, the polarization resistance Rp = 1.6 Ωcm2 in air, and Rp = 0.15 Ωcm2 in methane. Since perovskite-type manganites may show poor stability in reducing atmosphere, electrode stability is investigated. It is found that LSM shows a reversible modification of the crystal structure, assuming a Ruddlesden-Popper (RP) structure when exposed to methane. The RP structure is expected to be more stable compared to the LSM single perovskite. Furthermore, the composite electrode is expected to benefit from the presence of CGO, which is stable in reducing conditions.
Original languageEnglish
Article number139939
JournalElectrochimica Acta
Volume409
Number of pages14
ISSN0013-4686
DOIs
Publication statusPublished - 2022

Keywords

  • Direct Methane Fuel Cell (DMFC)
  • Electrochemical Impedance Spectroscopy (EIS)
  • Equivalent Circuit Modeling (ECM)
  • Gerischer
  • Intermediate Temperature
  • Solid Oxide Fuel Cell (IT-SOFC)
  • La0.6Sr0.4MnO3 (LSM)
  • Mixed Ionic-Electronic Conductor (MIEC)

Fingerprint

Dive into the research topics of 'Electrochemical Study of Symmetrical Intermediate Temperature - Solid Oxide Fuel Cells based on La0.6Sr0.4MnO3 / Ce0.9Gd0.1O1.95 for Operation in Direct Methane / Air'. Together they form a unique fingerprint.

Cite this