RT Journal Article
T1 Efficient symmetrical electrodes based on LaCrO3 via microstructural engineering.
A1 Zamudio-García, Javier
A1 Porras-Vázquez, José Manuel
A1 Ramírez-Losilla, Enrique
A1 Marrero-López, David
K1 Pilas de combustible
K1 Electroquímica
AB Novel nanostructured electrodes, La0.98Cr0.75B0.25O3δ (B = Mn, Fe, Ti and Cu), are prepared by a single spraypyrolysisdeposition method directly on the electrolyte and a porous Ce0.9Gd0.1O1.95 (CGO) scaffold. Theseperovskite-type electrodes without alkaline-earth metals exhibit low ionic/electronic conductivity; however, thepolarization resistance is greatly enhanced by microstructural design. The best results are obtained forLa0.98Cr0.75Mn0.25O3-δ deposited into a porous CGO-scaffold due to the synergetic effect of CGO, with high ionicconductivity, and doped-LaCrO3 with a predominantly electronic conductivity. The materials are investigated asboth air and fuel electrodes for solid oxide fuel cells (SOFCs) by different structural, microstructural and electrochemicaltechniques. Low values of polarization resistance are achieved for nanostructuredLa0.98Cr0.75Mn0.25O3-δ-CGO electrodes, i.e. 0.057 Ω cm2 in air at 800 ◦C, compared to 0.96 Ω cm2 for the samepowder electrode obtained by screen-printing deposition. An electrolyte-supported symmetrical cell generates astable maximum power output of 475 mW cm􀀀 2 at 800 ◦C.
PB Elsevier
YR 2021
FD 2021-09-30
LK https://hdl.handle.net/10630/28454
UL https://hdl.handle.net/10630/28454
LA eng
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 13 abr 2026