Application of GDC-YDB bilayer and LSM-YDB cathode for intermediate temperature solid oxide fuel cells
- Authors
- Lee, Jin Goo; Park, Myung Geun; Yoon, Hyon Hee; Shul, Yong Gun
- Issue Date
- Oct-2013
- Publisher
- SPRINGER
- Keywords
- Yttria-doped bismuth; Bilayer; Gadolinia-doped ceria; Lanthanum strontium manganate; Solid oxide fuel cell
- Citation
- JOURNAL OF ELECTROCERAMICS, v.31, no.1-2, pp.231 - 237
- Journal Title
- JOURNAL OF ELECTROCERAMICS
- Volume
- 31
- Number
- 1-2
- Start Page
- 231
- End Page
- 237
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/14270
- DOI
- 10.1007/s10832-013-9796-x
- ISSN
- 1385-3449
- Abstract
- Yttria-doped bismuth (YDB) and gadolinia-doped ceria (GDC) are investigated as a bilayer electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs). LSM-YDB is used as a cathode material in order to improve the poor ionic conduction of LSM and the compatibility with the YDB electrolyte. The performance of the bilayer cell was measured under humidified H-2 (3 % H2O) atmosphere and an operating temperature between 500 A degrees C and 650 A degrees C. The polarization resistance and ohmic resistance of the GDC-YDB bilayer cell were 0.189 a"broken vertical bar cm(2) and 0.227 a"broken vertical bar cm(2) at 650 A degrees C, respectively. The bilayer cell showed 0.527 Wcm(-2) in the maximum power density at 650 A degrees C, which is about two times higher than the single-layer cell of 0.21 Wcm(-2). The OCV of the bilayer cell was 0.89 V at 650 A degrees C, suggesting that the electronic conduction caused by the reduction of ceria was successfully suppressed by the YDB layer. The introduction of an YDB-GDC bilayer cell with LSM-YDB cathode thus appears to be a promising method for improving the performance of GDC-based SOFCs and reducing operating temperature.
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