Thermomechanical analysis of porous solid oxide fuel cell by using peridynamics

Hanlin Wang, Erkan Oterkus, Selahattin Celik, Serkan Toros

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Solid oxide fuel cell (SOFC) is widely used in hybrid marine propulsion systems due to its high power output, excellent emission control and wide fuel suitability. However, the operating temperature in SOFC will rise up to 800–1000 ℃ due to redox reaction among hydrogen and oxygen ions. This provides a suitable environment for ions transporting through ceramic materials. Under such operation temperatures, degradation may occur in the electrodes and electrolyte. As a result, unstable voltage, low capacity and cell failure may eventually occur. This study presents thermomechanical analysis of a porous SOFC cell plate which contains electrodes, electrolytes and pores. A microscale specimen in the shape of a plate is considered in order to maintain uniform temperature loading and increase the accuracy of estimation. A new computational technique, peridynamics, is utilized to calculate the deformations and stresses of the cell plate. Moreover, the crack formation and propagation are also obtained by using peridynamics. According to the numerical results, damage evolution depends on the electrolyte/electrode interface strength during the charging process. For weak interface strength case, damage emerges at the electrode/electrolyte interface. On the other hand, for stronger interface cases, damage emerges on pore boundaries especially with sharp corner.
LanguageEnglish
Pages585-600
Number of pages16
JournalAIMS Energy
Volume5
Issue number4
DOIs
Publication statusPublished - 12 Jun 2017

Fingerprint

Solid oxide fuel cells (SOFC)
Electrolytes
Electrodes
Ship propulsion
Redox reactions
Emission control
Ions
Ceramic materials
Crack initiation
Temperature
Crack propagation
Degradation
Hydrogen
Oxygen
Electric potential

Keywords

  • peridynamics
  • SOFC
  • numerical simulation
  • porous electrode
  • damage
  • solid oxide fuel cell
  • degradation
  • thermomechanical analysis
  • pore boundaries

Cite this

Wang, Hanlin ; Oterkus, Erkan ; Celik, Selahattin ; Toros, Serkan. / Thermomechanical analysis of porous solid oxide fuel cell by using peridynamics. In: AIMS Energy. 2017 ; Vol. 5, No. 4. pp. 585-600.
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Thermomechanical analysis of porous solid oxide fuel cell by using peridynamics. / Wang, Hanlin; Oterkus, Erkan; Celik, Selahattin; Toros, Serkan.

In: AIMS Energy, Vol. 5, No. 4, 12.06.2017, p. 585-600.

Research output: Contribution to journalArticle

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