| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Post-buckling design of thin-film electrolytes in micro-solid oxide fuel cells |
| Authors: | Safa, Yasser Hocker, Thomas Prestat, Michel Evans, Anna |
| DOI: | 10.1016/j.jpowsour.2013.10.125 |
| Published in: | Journal of Power Sources |
| Volume(Issue): | 250 |
| Page(s): | 332 |
| Pages to: | 342 |
| Issue Date: | 15-Mar-2014 |
| Publisher / Ed. Institution: | Elsevier |
| ISSN: | 0378-7753 1873-2755 |
| Language: | English |
| Subject (DDC): | 540: Chemistry 621.3: Electrical, communications, control engineering |
| Abstract: | The buckling behavior of a thin-film electrolyte of a micro-solid oxide fuel cell is investigated based on experimental measurements, analytical estimations and numerical simulations. An energy minimization procedure is applied in combination with the Rayleigh-Ritz method to represent the buckling modes, evaluate the buckling amplitude and determine the threshold values for instability transitions in the system. The residual stresses in the film deposited on a silicon substrate are evaluated based on wafer curvature whereby nanoindentations tests are applied to estimate the Young's modulus of the deposited film. The partial release of residual stresses in the film during free etching of the substrate is estimated by a new method combining pre-etching optical measurements with posteriori stress analysis. The energy interpretation of the obtained deflection shape is discussed. Comparisons between simulation results and experimental data show the efficiency of this method to predict various buckling stages of free-standing thin films. A post-buckling design space for thin-film electrolyte fabrication is presented by applying a stress-based failure criterion. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/1634 |
| Fulltext version: | Published version |
| License (according to publishing contract): | Licence according to publishing contract |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Computational Physics (ICP) |
| Appears in collections: | Publikationen School of Engineering |
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Safa, Y., Hocker, T., Prestat, M., & Evans, A. (2014). Post-buckling design of thin-film electrolytes in micro-solid oxide fuel cells. Journal of Power Sources, 250, 332–342. https://doi.org/10.1016/j.jpowsour.2013.10.125
Safa, Y. et al. (2014) ‘Post-buckling design of thin-film electrolytes in micro-solid oxide fuel cells’, Journal of Power Sources, 250, pp. 332–342. Available at: https://doi.org/10.1016/j.jpowsour.2013.10.125.
Y. Safa, T. Hocker, M. Prestat, and A. Evans, “Post-buckling design of thin-film electrolytes in micro-solid oxide fuel cells,” Journal of Power Sources, vol. 250, pp. 332–342, Mar. 2014, doi: 10.1016/j.jpowsour.2013.10.125.
SAFA, Yasser, Thomas HOCKER, Michel PRESTAT und Anna EVANS, 2014. Post-buckling design of thin-film electrolytes in micro-solid oxide fuel cells. Journal of Power Sources. 15 März 2014. Bd. 250, S. 332–342. DOI 10.1016/j.jpowsour.2013.10.125
Safa, Yasser, Thomas Hocker, Michel Prestat, and Anna Evans. 2014. “Post-Buckling Design of Thin-Film Electrolytes in Micro-Solid Oxide Fuel Cells.” Journal of Power Sources 250 (March): 332–42. https://doi.org/10.1016/j.jpowsour.2013.10.125.
Safa, Yasser, et al. “Post-Buckling Design of Thin-Film Electrolytes in Micro-Solid Oxide Fuel Cells.” Journal of Power Sources, vol. 250, Mar. 2014, pp. 332–42, https://doi.org/10.1016/j.jpowsour.2013.10.125.
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