A study of solid oxide fuel cell stack failure by inducing abnormal behavior in a single cell test

Lim, Hyung Tae; Virkar, Anil V.

doi:10.1016/j.jpowsour.2008.07.051

Cited by 52 publications

(23 citation statements)

References 9 publications

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“…(19) through (21) (for a one dimensional case) assuming transport parameters are constant, independent of position, gives …”

Section: +˚(22)mentioning

confidence: 99%

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Transport through mixed proton, oxygen ion and electron (hole) conductors: Goldman–Hodgkin–Katz-type equation

Virkar

2009

Journal of Power Sources

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“…(19) through (21) (for a one dimensional case) assuming transport parameters are constant, independent of position, gives …”

Section: +˚(22)mentioning

confidence: 99%

“…In such a case, the chemical potentials of H 2 and O 2 within the electrolyte are not mathematically bounded. There are some situations in which stack failure can occur as described previously [16,19].…”

Section: Significance Of Equations Describing Chemical Potentials Insmentioning

confidence: 99%

Transport through mixed proton, oxygen ion and electron (hole) conductors: Goldman–Hodgkin–Katz-type equation

Virkar

2009

Journal of Power Sources

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“…30)32) In the case of pure ionic conducting materials, such as YSZ, the cell showed significant degradation after negative voltage operation with the observation of anode delamination due to high internal partial pressure in the electrolyte close to the anode side. 29) From this point of view, BCY cells were expected to be resistant to degradation caused by negative voltage operation (in fact, any delamination was observed after the tests in the present work). However, their performance was significantly degraded after abnormal operation (negative cell voltage conditions).…”

Section: Resutls and Discussionmentioning

confidence: 74%

Degradation study of yttria-doped barium cerate (BCY) electrolyte in protonic ceramic fuel cells under various operating conditions

Park

Kim

Lim

2015

J. Ceram. Soc. Japan

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Yttria doped barium cerate (BCY) electrolyte, Ni+BCY anode supported cells were fabricated, and their stability and the mechanism of their degradation were investigated through constant current tests under various operating conditions, especially negative cell voltage operation (with respect to degradation phenomenon due to cell imbalance in a series connected stack). The results of electrochemical tests (IV characteristics and impedance spectra) indicate that the degradation rate was significant when the cell was operated under higher current densities (regardless of the sign of cell voltage) and only the ambient air was used for the cathode. Post-material analyses revealed that microstructural and compositional changes were obvious in the BCY electrolyte and the BCY of the cathode functional layer because of BCY decomposition in the wet atmosphere at the cathode. Thus, the present work concludes that the degradation rate of BCY electrolyte-based cell depends on operating conditions, i.e., the amount of current density (the water vapor production rate at the cathode) and the air flow rate (flushing water vapor at the cathode).

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“…Virkar [17,18] and Lim and Virkar [19] have been developing a solid oxide cell degradation model based on non-equilibrium thermodynamics. Currently, Virkar [20] is extending this modeling approach to SOEC also.…”

Section: Modeling Of Soec Degradation By University Of Utahmentioning

confidence: 99%

Degradation Issues in Solid Oxide Cells During High Temperature Electrolysis

Sohal

O’Brien

Stoots

et al. 2010

ASME 2010 8th International Fuel Cell Science, Engineering and Technology Conference: Volume 1

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Idaho National Laboratory (INL) is performing hightemperature electrolysis (HTE) research to generate hydrogen using solid oxide electrolysis cells (SOECs). The project goals are to address the technical and degradation issues associated with the SOECs. This paper provides a summary of ongoing INL and INL-sponsored activities aimed at addressing SOEC degradation. These activities include stack testing, post-test examination, degradation modeling, and issues that need to be addressed in the future.Major degradation issues relating to solid oxide fuel cells (SOFC) are relatively better understood than those for SOECs. Some of the degradation mechanisms in SOFCs include contact problems between adjacent cell components, microstructural deterioration (coarsening) of the porous electrodes, and blocking of the reaction sites within the electrodes. Contact problems include delamination of an electrode from the electrolyte, growth of a poorly (electronically) conducting oxide layer between the metallic interconnect plates and the electrodes, and lack of contact between the interconnect and the electrode.

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A study of solid oxide fuel cell stack failure by inducing abnormal behavior in a single cell test

Cited by 52 publications

References 9 publications

Transport through mixed proton, oxygen ion and electron (hole) conductors: Goldman–Hodgkin–Katz-type equation

Transport through mixed proton, oxygen ion and electron (hole) conductors: Goldman–Hodgkin–Katz-type equation

Degradation study of yttria-doped barium cerate (BCY) electrolyte in protonic ceramic fuel cells under various operating conditions

Degradation Issues in Solid Oxide Cells During High Temperature Electrolysis

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