Design guidelines for the manufacturing of the electrode-electrolyte interface of solid oxide fuel cells

Chih-Che Chueh, Antonio Bertei, Cristiano Nicolella

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The advent of 3D printing has ushered in the scope for designing microstructures for solid oxide fuel cells (SOFCs) with enhanced power density and lifetime. Additive manufacturing can introduce structural modifications such as dense electrolyte pillars embedded within the porous electrode domain to facilitate ion transport. This study presents comprehensive guidelines to the design of electrolyte pillars to minimize the polarization resistance and increase the electrode robustness by means of a numerical model comprising electrochemical phenomena and structural mechanics. Numerical results show that the introduction of rectangular and trapezoidal pillars can reduce electrode polarization provided that an electrode thickness larger than the active thickness is used. Lateral fins or any protrusions sticking out the pillar hinder gas transport and should be avoided. Mechanical stress, up to twice the external compressive load, accumulates at the pillar/electrolyte junction, indicating that sharp corners must be smoothed during pillar manufacturing. Additional considerations regarding the fabrication accuracy and minimum resolution are addressed too. Although a simple and general recipe for the optimal electrode fabrication is not possible, the rationale behind the strategies for the best pillar design are presented and critically discussed.

Original languageEnglish
Article number226888
JournalJournal of Power Sources
Volume437
DOIs
Publication statusPublished - 2019 Oct 15

Fingerprint

solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Electrolytes
manufacturing
electrolytes
Electrodes
electrodes
3D printers
Polarization
Fabrication
gas transport
fabrication
fins
polarization
printing
Printing
radiant flux density
Numerical models
Loads (forces)
Mechanics

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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Design guidelines for the manufacturing of the electrode-electrolyte interface of solid oxide fuel cells. / Chueh, Chih-Che; Bertei, Antonio; Nicolella, Cristiano.

In: Journal of Power Sources, Vol. 437, 226888, 15.10.2019.

Research output: Contribution to journalArticle

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