Intermediate temperature solid oxide electrolysis cell using LaGaO 3-base oxide

Tatsumi Ishihara, Shotaro Matsushita, Takaaki Sakai, Hiroshige Matsumoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

NiFe oxide composite was studied as cathode of steam electrolysis cell using LaGaO 3 based oxide for electrolyte and it was found that H 2 formation rate at 1.6 V was much improved by combination of oxygen ion conducting oxide with NiFe (9:1) bimetallic alloy. In particular, a combination with La 0.6Sr 0.4Fe 0.9Mn 0.1O 3 (LSFM) or Ce 0.8Sm 0.2O 2 (SDC) is highly effective for increasing current density. Impedance plots for cathode consisted of two semicircles, which could be assigned to a diffusion and an activation overpotential in low and high frequency region, respectively. Compared with NiFe, mixing with SDC is much more effective for decreasing the diffusion overpotential. This might be assigned to increase in three phase boundary and porosity of cathode.

Original languageEnglish
Pages (from-to)77-80
Number of pages4
JournalSolid State Ionics
Volume225
DOIs
Publication statusPublished - Oct 4 2012

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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