Dimethyl ether fueled intermediate temperature SOFC using LaGaO3-based perovskite electrolytes

Shizhong Wang, Tatsumi Ishihara, Yusaku Takita

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Intermediate temperature solid oxide fuel cells (SOFCs) fueled with dimethyl ether (DME) were investigated. The performance of a single cell, Ni/La0.9Sr0.1Ga0.8Mg0.2O3 /Sm0.5Sr0.5O3, fueled with DME was comparable to that of the cell fueled with hydrogen at 1073 K. However, the power density of the DME cell decreased dramatically with decreasing temperature and showed lower maximum power density than H2 cell at 973 K due to high anodic overpotential. The oxidation of DME on Ni was rather complex, and there were at least two arcs in the impedance spectra under polarization, while there was only one arc when the anode was exposed to H2. The activity of the anode was improved greatly by using Ni-Sm3+ doped ceria (Ni-SDC) composite anode or Ni-SDC/SDC bilayer anode. DME decomposition into CH4, CO, and H2 takes place at the first step, and the overall reaction is close to the partial oxidation of DME into CO and H2 with increasing current density.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume5
Issue number8
DOIs
Publication statusPublished - Aug 2002
Externally publishedYes

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solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Perovskite
Electrolytes
Ethers
ethers
electrolytes
Anodes
anodes
Cerium compounds
Carbon Monoxide
cells
Temperature
temperature
radiant flux density
arcs
Oxidation
oxidation
dimethyl ether
perovskite

All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Materials Science(all)

Cite this

Dimethyl ether fueled intermediate temperature SOFC using LaGaO3-based perovskite electrolytes. / Wang, Shizhong; Ishihara, Tatsumi; Takita, Yusaku.

In: Electrochemical and Solid-State Letters, Vol. 5, No. 8, 08.2002.

Research output: Contribution to journalArticle

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AB - Intermediate temperature solid oxide fuel cells (SOFCs) fueled with dimethyl ether (DME) were investigated. The performance of a single cell, Ni/La0.9Sr0.1Ga0.8Mg0.2O3 /Sm0.5Sr0.5O3, fueled with DME was comparable to that of the cell fueled with hydrogen at 1073 K. However, the power density of the DME cell decreased dramatically with decreasing temperature and showed lower maximum power density than H2 cell at 973 K due to high anodic overpotential. The oxidation of DME on Ni was rather complex, and there were at least two arcs in the impedance spectra under polarization, while there was only one arc when the anode was exposed to H2. The activity of the anode was improved greatly by using Ni-Sm3+ doped ceria (Ni-SDC) composite anode or Ni-SDC/SDC bilayer anode. DME decomposition into CH4, CO, and H2 takes place at the first step, and the overall reaction is close to the partial oxidation of DME into CO and H2 with increasing current density.

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