TY - JOUR
T1 - Thermo-mechanical analysis of 3D manufactured electrodes for solid oxide fuel cells
AU - Chueh, Chih Che
AU - Bertei, Antonio
N1 - Funding Information:
This study was partially supported by Ministry of Science and Technology (MOST), Taiwan, ROC, under grant no. MOST 108-2218-E-006-028-MY3. Any opinions, findings and conclusions for recommendations given in this article are those of the authors and don't necessarily reflect the viewpoints of the MOST. Helpful discussions with Prof. Chyanbin Hwu (National Cheng Kung University) are gratefully acknowledged. The authors acknowledge the unknown reviewer whose insightful comments substantially improved the quality of the manuscript.
Funding Information:
This study was partially supported by Ministry of Science and Technology (MOST) , Taiwan, ROC, under grant no. MOST 108-2218-E-006-028-MY3 . Any opinions, findings and conclusions for recommendations given in this article are those of the authors and don’t necessarily reflect the viewpoints of the MOST. Helpful discussions with Prof. Chyanbin Hwu (National Cheng Kung University) are gratefully acknowledged. The authors acknowledge the unknown reviewer whose insightful comments substantially improved the quality of the manuscript.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - Additive manufacturing has widened the scope for designing more performing microstructures for solid oxide fuel cells (SOFCs). Structural modifications, such as the insertion of ceramic pillars within the electrode, facilitate ion transport and boost the electrochemical performance. However, questions still remain on the related mechanical requirements during operation. This study presents a comprehensive thermal-electrochemical-mechanical model targeted to assess the stress distribution in 3D manufactured electrodes. Simulations show that a dense pillar increases the stress distribution by ca. 10 % compared to a flat electrode benchmark. The stress is generated by the material thermal contraction and intensifies at the pillar-electrolyte junction while external loads have negligible effects. An analysis on manufacturing inaccuracies indicates that sharp edges, surface roughness and tilted pillars intensify the stress; nonetheless, the corresponding stress increase is narrow, suggesting that manufacturing inaccuracies can be easily tolerated. The model points towards robust design criteria for 3D manufactured electrodes.
AB - Additive manufacturing has widened the scope for designing more performing microstructures for solid oxide fuel cells (SOFCs). Structural modifications, such as the insertion of ceramic pillars within the electrode, facilitate ion transport and boost the electrochemical performance. However, questions still remain on the related mechanical requirements during operation. This study presents a comprehensive thermal-electrochemical-mechanical model targeted to assess the stress distribution in 3D manufactured electrodes. Simulations show that a dense pillar increases the stress distribution by ca. 10 % compared to a flat electrode benchmark. The stress is generated by the material thermal contraction and intensifies at the pillar-electrolyte junction while external loads have negligible effects. An analysis on manufacturing inaccuracies indicates that sharp edges, surface roughness and tilted pillars intensify the stress; nonetheless, the corresponding stress increase is narrow, suggesting that manufacturing inaccuracies can be easily tolerated. The model points towards robust design criteria for 3D manufactured electrodes.
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U2 - 10.1016/j.jeurceramsoc.2020.09.004
DO - 10.1016/j.jeurceramsoc.2020.09.004
M3 - Article
AN - SCOPUS:85090957792
SN - 0955-2219
VL - 41
SP - 497
EP - 508
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 1
ER -