Effects of electrolyte pattern on mechanical and electrochemical properties of solid oxide fuel cells |
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Authors: | Bora Timurkutluk Selahattin Celik Serkan Toros Cigdem Timurkutluk Mahmut D Mat Yuksel Kaplan |
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Affiliation: | 1. Nigde University, Mechanical Engineering Department, 51245 Nigde, Turkey;2. Vestel Defense Industry, Silicon Block, ZK 14, ODTU Teknokent, 06531 Ankara, Turkey;3. Gazi University, Mechanical Engineering Department, 06570 Ankara, Turkey |
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Abstract: | In order to enhance the electrochemical performance and reduce the operation temperature of a conventional electrolyte supported solid oxide fuel cell (SOFC), a three layered electrolyte with various geometry is designed and fabricated. Novel three layered electrolytes comprise a dense and thin scandia alumina stabilized zirconia (ScAlSZ) electrolyte layer sandwiched between two hallow ScAlSZ electrolyte layers each having the same thickness as the support but machined into a filter like architecture in the active region with circular, rectangular and triangular cut off patterns. The percent of thin electrolyte layer in the active region is kept constant as 30% for all designs in order to investigate the effect of pattern geometry on the mechanical properties and the performance of the electrolytes. Single cells based on novel electrolytes are manufactured and electrochemical properties are evaluated. A standard electrolyte and electrolyte supported cell are also fabricated as a base case for comparison. Although the electrolyte having triangular patterns has the highest peak power at all operation temperatures considered, it exhibits the lowest flexural strength. |
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