Mechanical and electrochemical behavior of novel electrolytes based on partially stabilized zirconia for solid oxide fuel cells |
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| Affiliation: | 1. Nigde University, Mechanical Engineering Department, 51245 Nigde, Turkey;2. Nigde University Prof. Dr. T. Nejat Veziroglu Clean Energy Research Center, 51245 Nigde, Turkey;3. Vestel Defense Industry, Universiteler Mah. Ihsan Dogramaci Bul. Titanyum Blok 17/B Teknokent ODTU, 06800 Ankara, Turkey;1. Nigde Omer Halisdemir University, Mechanical Engineering Department, 51245 Nigde, Turkey;2. Nigde Omer Halisdemir University Prof. Dr. T. Nejat Veziroglu Clean Energy Research Center, 51245 Nigde, Turkey;3. Vestel Defense Industry, Universiteler Mah. Ihsan Dogramaci Bul. Titanyum Blok 17/B Teknokent ODTU, 06800 Ankara, Turkey;1. Nigde University, Mechanical Engineering Department, 51245 Nigde, Turkey;2. Meliksah University, Mechanical Engineering Department, 38280 Kayseri, Turkey;1. Recep Tayyip Erdogan University, Mechanical Engineering Department, 53100 Rize, Turkey;2. Nigde University, Mechanical Engineering Department, 51245 Nigde, Turkey;3. Vestel Defense Industry, Universiteler Mah, Ihsan Dogramaci Bul, Titanyum Blok, 17/B Teknokent ODTU, 06800 Ankara, Turkey;1. Nigde University, Mechanical Engineering Department 51245, Nigde, Turkey;2. Nigde University Prof. Dr. T. Nejat Veziroglu Clean Energy Research Center 51245, Nigde, Turkey;1. Institute for Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, Germany;2. Plansee SE, Innovation Services, Reutte, Austria |
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| Abstract: | In this study, 3 mol% yttria stabilized zirconia (3YSZ) is investigated as a SOFC electrolyte alternative to 8 mol% yttria stabilized zirconia (8YSZ). The mechanical and electrochemical properties of both materials are compared. The mechanical tests indicate that the thickness of 3YSZ can be reduced to half without sacrificing the strength compared to 8YSZ. By reducing the thickness of 3YSZ from 150 µm to 75 µm, the peak power density is shown to increase by around 80%. The performance is further enhanced by around 22% by designing of novel electrode structure with regular cut-off patterns previously optimized. However, the cell with novel designed 3YSZ electrolyte exhibits 30% lower maximum power density than that of the cell with 150 µm-thick standard 8YSZ electrolyte. Nevertheless, the loss in the performance may be tolerated by decreasing the fabrication cost revealing that 3YSZ electrolyte with cut-off patterns can be employed as SOFC electrolyte alternative to 8YSZ. |
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| Keywords: | Solid oxide fuel cell Yttria stabilized zirconia Novel electrolyte design Tensile test |
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