SERQUIS Adriana Cristina
Nanostructured Cathode Thin Films with Vertically-Aligned Nanopores for Thin Film SOFC and their Characteristics
J. S. YOON; R. ARAUJO; N. GRUNBAUM; L. BAQUÉ; A. SERQUIS; A. CANEIRO; X. ZHANG; H. WANG
APPLIED SURFACE SCIENCE
Año: 2007 vol. 254 p. 266 - 269
Nanostructured cathode thin films with vertically-aligned nanopores (VANP ) were processed using a pulsed laser deposition technique (P L D ). These VANP structures enhance the ox ygen-gas phase diffusivity, thus improve the overall thin film SOFC performance. La0.5Sr0.5CoO3 (LSCO) and La0.4Sr0.6Co0.8Fe0.2O3 (LSCFO) were deposited on various substrates (YSZ , Si and pressed Ce0.9G d0.1O1.9 5 disks). Microstructures and properties of the nanostructured cathodes were characteriz ed by TEM , HRTEM, SEM and electrochemical measurements. A dditionally these well-aligned V A NP structures relieve or partially relieve the internal thermal stress and lattice strain caused by the differences of thermal ex pansion coefficients and lattice mismatch between the electrode and the electrolyte.