Novel structured gadolinium doped ceria based electrolytes for intermediate temperature solid oxide fuel cells

Date

2011-11-15

Author

Timurkutluk, Bora
Timurkutluk, Cigdem
MAT, MAHMUT DURSUN
Kaplan, Yuksel

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Novel three-layered intermediate temperature solid oxide fuel cell (SOFC) electrolytes based on gadolinium doped ceria (GDC) are developed to suppress the electronic conductivity of GDC, to improve the mechanical properties of the cell and to minimize power loss due to mixed conductive nature of GDC. Three different electrolytes are fabricated by sandwiching thin YSZ. ScSZ and ScCeSZ between two relatively thick GDC layers. An electrolyte composed of pure GDC is also manufactured for comparison. NiO/GDC and LSCF/GDC electrodes are then coated on the electrolytes by a screen printing route. SEM results show that it is possible to obtain dense and crack free thin layers of YSZ, ScSZ and ScCeSZ between two GDC layers without delamination. Performance measurements indicate that interlayered thin electrolytes act as an electronic conduction barrier and improve open circuit voltages (OCVs) of GDC based cells.

Subject Keywords

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

URI

https://hdl.handle.net/11511/67415

Collections

Graduate School of Natural and Applied Sciences, Article