Real-time electrochemical impedance spectroscopy diagnosis of the solid oxide fuel cell for marine power applications

Research output: Contribution to journalArticle

Abstract

We have investigated the behavior of an operating solid oxide fuel cell (SOFC) with supplying a simulated syngas to develop diagnosis method of the SOFC for marine power applications fueled with liquefied natural gas (LNG). We analyze the characteristics of a syngas-fueled intermediate temperature microtubular SOFC at 500 C for accelerated deterioration by carbon deposition as a model case by electrochemical impedance spectroscopy (EIS) to in-situ find parameters useful for the real-time diagnosis. EIS analyses are performed by complex nonlinear least squares (CNLS) curve fitting to measured impedance spectra with an equivalent electric circuit model consisting of several resistances and capacitances attributed to the anode and cathode processes as well as Ohmic resistance of the cell. The characteristic changes of those circuit parameters by internal reforming and anode degradation are extracted, showing that they can be used for the real-time diagnosis of operating SOFCs.

Original languageEnglish
Pages (from-to)2551-2558
Number of pages8
JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
Volume54
Issue number8
DOIs
Publication statusPublished - Aug 1 2018

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solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Electrochemical impedance spectroscopy
synthesis gas
impedance
anodes
liquefied natural gas
spectroscopy
Anodes
supplying
curve fitting
deterioration
Acoustic impedance
Networks (circuits)
Curve fitting
Reforming reactions
cathodes
capacitance
Liquefied natural gas
degradation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

Cite this

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abstract = "We have investigated the behavior of an operating solid oxide fuel cell (SOFC) with supplying a simulated syngas to develop diagnosis method of the SOFC for marine power applications fueled with liquefied natural gas (LNG). We analyze the characteristics of a syngas-fueled intermediate temperature microtubular SOFC at 500 ∘C for accelerated deterioration by carbon deposition as a model case by electrochemical impedance spectroscopy (EIS) to in-situ find parameters useful for the real-time diagnosis. EIS analyses are performed by complex nonlinear least squares (CNLS) curve fitting to measured impedance spectra with an equivalent electric circuit model consisting of several resistances and capacitances attributed to the anode and cathode processes as well as Ohmic resistance of the cell. The characteristic changes of those circuit parameters by internal reforming and anode degradation are extracted, showing that they can be used for the real-time diagnosis of operating SOFCs.",
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