Improved reoxidation tolerance of Ni-Fe metal support for LaGaO 3 thin film electrolyte cell

Young Wan Ju, Shintaro Ida, Toru Inagaki, Tatsumi Ishihara

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Effects of reoxidation and reduction treatment of a Ni-Fe metallic anode substrate were investigated as a function of reoxidation period and temperature. The NiFe 2O 4 composite anode substrate was highly dense before the reduction treatment. However, after reduction for 2 h in H 2 atmosphere, the dense oxide composite substrate was changed to a porous metal substrate consisting of a Ni-Fe alloy. The metallic substrate was then reoxidized in 100% O 2. When the reoxidation treatment was performed, the porous substrate regained its original density. However, XRD patterns of the reoxidized substrate still exhibited strong Ni base alloy peaks. Moreover, SEM-EDX analysis showed that a large part of the reoxidized substrate was porous and a dense iron base oxide layer formed at the surface of the substrate. In addition, after reduction for 2 h with hydrogen gas, the substrate returned to a porous metal substrate again. Therefore, in spite of slightly increased anodic IR loss and a small fuel-leakage, which was observed after the reoxidation and reduction cycles, the Ni-Fe metal supported cell showed an excellent reoxidation tolerance at 973 K.

Original languageEnglish
Pages (from-to)58-63
Number of pages6
JournalSolid State Ionics
Volume216
DOIs
Publication statusPublished - May 28 2012

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Electrolytes
Metals
electrolytes
Thin films
Substrates
thin films
cells
metals
Oxides
Anodes
anodes
composite materials
oxides
Composite materials
Energy dispersive spectroscopy
Hydrogen
leakage
Iron
Gases
iron

All Science Journal Classification (ASJC) codes

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

Cite this

Improved reoxidation tolerance of Ni-Fe metal support for LaGaO 3 thin film electrolyte cell. / Ju, Young Wan; Ida, Shintaro; Inagaki, Toru; Ishihara, Tatsumi.

In: Solid State Ionics, Vol. 216, 28.05.2012, p. 58-63.

Research output: Contribution to journalArticle

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abstract = "Effects of reoxidation and reduction treatment of a Ni-Fe metallic anode substrate were investigated as a function of reoxidation period and temperature. The NiFe 2O 4 composite anode substrate was highly dense before the reduction treatment. However, after reduction for 2 h in H 2 atmosphere, the dense oxide composite substrate was changed to a porous metal substrate consisting of a Ni-Fe alloy. The metallic substrate was then reoxidized in 100{\%} O 2. When the reoxidation treatment was performed, the porous substrate regained its original density. However, XRD patterns of the reoxidized substrate still exhibited strong Ni base alloy peaks. Moreover, SEM-EDX analysis showed that a large part of the reoxidized substrate was porous and a dense iron base oxide layer formed at the surface of the substrate. In addition, after reduction for 2 h with hydrogen gas, the substrate returned to a porous metal substrate again. Therefore, in spite of slightly increased anodic IR loss and a small fuel-leakage, which was observed after the reoxidation and reduction cycles, the Ni-Fe metal supported cell showed an excellent reoxidation tolerance at 973 K.",
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N2 - Effects of reoxidation and reduction treatment of a Ni-Fe metallic anode substrate were investigated as a function of reoxidation period and temperature. The NiFe 2O 4 composite anode substrate was highly dense before the reduction treatment. However, after reduction for 2 h in H 2 atmosphere, the dense oxide composite substrate was changed to a porous metal substrate consisting of a Ni-Fe alloy. The metallic substrate was then reoxidized in 100% O 2. When the reoxidation treatment was performed, the porous substrate regained its original density. However, XRD patterns of the reoxidized substrate still exhibited strong Ni base alloy peaks. Moreover, SEM-EDX analysis showed that a large part of the reoxidized substrate was porous and a dense iron base oxide layer formed at the surface of the substrate. In addition, after reduction for 2 h with hydrogen gas, the substrate returned to a porous metal substrate again. Therefore, in spite of slightly increased anodic IR loss and a small fuel-leakage, which was observed after the reoxidation and reduction cycles, the Ni-Fe metal supported cell showed an excellent reoxidation tolerance at 973 K.

AB - Effects of reoxidation and reduction treatment of a Ni-Fe metallic anode substrate were investigated as a function of reoxidation period and temperature. The NiFe 2O 4 composite anode substrate was highly dense before the reduction treatment. However, after reduction for 2 h in H 2 atmosphere, the dense oxide composite substrate was changed to a porous metal substrate consisting of a Ni-Fe alloy. The metallic substrate was then reoxidized in 100% O 2. When the reoxidation treatment was performed, the porous substrate regained its original density. However, XRD patterns of the reoxidized substrate still exhibited strong Ni base alloy peaks. Moreover, SEM-EDX analysis showed that a large part of the reoxidized substrate was porous and a dense iron base oxide layer formed at the surface of the substrate. In addition, after reduction for 2 h with hydrogen gas, the substrate returned to a porous metal substrate again. Therefore, in spite of slightly increased anodic IR loss and a small fuel-leakage, which was observed after the reoxidation and reduction cycles, the Ni-Fe metal supported cell showed an excellent reoxidation tolerance at 973 K.

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