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


Timurkutluk B., Timurkutluk C., MAT M. D. , Kaplan Y.

JOURNAL OF POWER SOURCES, cilt.196, ss.9361-9364, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 196 Konu: 22
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.jpowsour.2011.07.047
  • Dergi Adı: JOURNAL OF POWER SOURCES
  • Sayfa Sayıları: ss.9361-9364

Özet

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. (C) 2011 Elsevier B.V. All rights reserved.