RT Journal Article
T1 Vertical heterostructures for symmetrical and reversible solid oxide fuel cells
A1 Zamudio-García, Javier
A1 Chiabrera, Francesco
A1 Losilla, Enrique R.
A1 Marrero-López, David
A1 Esposito, Vincenzo
K1 Pilas de combustible
K1 Electroquímica
AB Interfacial modification using functional metal oxides holds great potential for enhancing the electrochemical performance of solid oxide fuel cells (SOFCs). This study presents a redox-stable vertically aligned nanostructure (VAN) thin film based on a heteroepitaxial perovskite-fluorite nanocomposite prepared by pulsed laser deposition on different substrates. The self-assembled functional layers consist of alternating columns of two well-differentiated phases, (La0.8Sr0.2)0.95Fe0.8Ti0.2O3−δ-Ce0.9Gd0.1O1.95 (LSFT-CGO) VAN, with multiple strained vertical interfaces. The coexistence of two immiscible phases at the nanoscale significantly extends the triple phase boundary (TPB) and reaction sites, resulting in fast electrochemical redox reactions. The LSFT-CGO VAN active layer demonstrates improved performance under both air and H2 conditions, with polarization resistances of 2.9 and 75.9 Ω cm2 at 650 °C, respectively. The nanoengineering design of functional metal oxides featuring hierarchical columnar architecture represents a significant step towards developing efficient energy conversion devices, particularly symmetrical and reversible SOFCs.
PB Elsevier
YR 2024
FD 2024-09-24
LK https://hdl.handle.net/10630/39451
UL https://hdl.handle.net/10630/39451
LA eng
NO Nano Energy 2024, 131, 110293
NO PID2021-126009OB-I00 funded by MCIN/AEI/10.13039/501100011033TED2021-129836B-I00, funded by MCIN/AEI/10.13039/501100011033(Grants No. 9041-00034B and 1032-00261B) funded by DFF
NO Ministerio de Educación, Cultura y Deporte
NO Independent Research Fund Denmark
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026