RT Journal Article
T1 Enhanced thermal and electrochemical properties in La0.8Sr0.2MnO3-δ-Pr6O11 nanocomposite cathodes for solid oxide fuel cells
A1 Zamudio-García, Javier
A1 Caizán-Juanarena, Leire
A1 Dos-Santos-Gómez, Lucía
A1 Porras-Vázquez, José Manuel
A1 Ramírez-Losilla, Enrique
A1 Marrero-López, David
K1 Cristalografía
K1 Cátodos
K1 Pilas de combustible
AB La0.8Sr0.2MnO3-δ (LSM)-Pr6O11 nanocomposite electrodes are prepared via a one-step spray-pyrolysis deposition directly onto the electrolyte and evaluated as cathodes for solid oxide fuel cells (SOFCs). The nanoscale integration of two immiscible phases effectively inhibits grain growth while improving mechanical compatibility with the electrolyte. The confinement of the fluorite Pr6O11 phase at the nanoscale during the self-assembly process, achieved by adding the perovskite-type LSM phase with a different crystal structure, hinder the thermally induced phase transitions of Pr6O11 compared to the bulk material. The extended triple-phase-boundary (TPB) in these nanoengineered electrodes leads to exceptional electrochemical performance, achieving a polarization resistance of 0.21 Ω cm2 at 650 °C, significantly lower than the 5.8 Ω cm2 measured for a traditional screen-printed LSM cathode. An anode-supported cell incorporating these nanocomposite electrodes achieves a peak power density of 1.22 W cm−2 at 800 °C in wet H2, far exceeding the 0.58 W cm−2 observed for the single cell with a commercial LSM electrode under identical conditions. These findings underscore the significant benefits of advanced nanostructured electrode designs and innovative fabrication techniques in achieving high performance and durability in SOFCs.
PB Elsevier
YR 2025
FD 2025-04-12
LK https://hdl.handle.net/10630/40672
UL https://hdl.handle.net/10630/40672
LA eng
NO International Journal of Hydrogen Energy 126 (2025) 552–561
NO PID2021–126009OB-I00 and TED2021-129836B–I00
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026