Extended use of renewable energy sources requires innovative and efficient technologies for energy storage / management and CO2 removal/reuse. Solid Oxide Cells (SOC) offer a feasible approach, although not economically sustainable yet [1]. Therefore improvement are still required, especially about long-term degradation and electrochemical performances. This work presents the surface modification of a Ce0.8Sm0.2O2-δ (SDC) electrolyte by Femtosecond Laser Micromachining (FLM) to increase the interfacial area and therefore reduce electrodes overpotential [2,3]. A pattern with an equally spaced pillar shape microstructure was obtained and characterized (Figure 1). Symmetrical cells with (La0.6Sr0.4)0.95Co0.2Fe0.8O3-δ electrodes were also prepared and characterized by XRD, XPS and Impedance Spectroscopy. Better performances and stability was obtained in patterned samples as a result of increased area and C3+/Ce4+ ratio at the electrode-eletrolyte interface.
Optimization of interfaces in SOC by femtosecond laser patterning
M. Viviani
Primo
Conceptualization
;S. PrestoSecondo
Conceptualization
;S. Massardo;J. F. Basbus;M. P. Carpanese;A. Barbucci
2024
Abstract
Extended use of renewable energy sources requires innovative and efficient technologies for energy storage / management and CO2 removal/reuse. Solid Oxide Cells (SOC) offer a feasible approach, although not economically sustainable yet [1]. Therefore improvement are still required, especially about long-term degradation and electrochemical performances. This work presents the surface modification of a Ce0.8Sm0.2O2-δ (SDC) electrolyte by Femtosecond Laser Micromachining (FLM) to increase the interfacial area and therefore reduce electrodes overpotential [2,3]. A pattern with an equally spaced pillar shape microstructure was obtained and characterized (Figure 1). Symmetrical cells with (La0.6Sr0.4)0.95Co0.2Fe0.8O3-δ electrodes were also prepared and characterized by XRD, XPS and Impedance Spectroscopy. Better performances and stability was obtained in patterned samples as a result of increased area and C3+/Ce4+ ratio at the electrode-eletrolyte interface.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.