Stabilization of cathode-electrolyte interfaces with high-entropy perovskites
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https://doi.esrf.fr/10.15151/ESRF-ES-2256535546
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资源简介：
Interdiffusion at the interface represent the main degradation mechanism of high temperature solid-oxide electrochemical cells. High-entropy perovskite oxides represent a promising way to stabilize and increase conductivity of electrodes, also avoiding the use of critical raw materials. Motivated by our previous studies, we propose to use X-ray microspectroscopy on the B-site cations to study the interaction of four high-entropy La(Ca,Ba)Fe(Mn,Ni)O3-based cathodes interfaced with ceria electrolyte after prolonged operation under working conditions, including electrical load. Applying micro-XANES and micro-XRF, we will investigate cation interdiffusion, oxidation states, and relative stability of four different cathode compositions. The expected results will help to model the stability of the cathode/electrolyte system with respect to composition, and the role of entropy to enhance the crystal chemical stability of the perovskite phase under realistic operating conditions.
提供机构：
University of Palermo, Department of Physics and Chemistry, Viale delle Scienze - Ed. 18, I-90128, Palermo, IT; University of Palermo, Department of Physics and Chemistry, Viale delle Scienze - Ed. 18, I-90128 Palermo, Italy
创建时间：
2028-01-01
