Grain and grain boundary transport in BaCe0.5Zr0.3Ln0.2O3−Δ (Ln – Y or lanthanide) electrolytes attractive for protonic ceramic fuel cells application
Date
2017Language
en
Sujet
Résumé
Protonic ceramic fuel cells (PCFCs) belong to very attractive energy conversion systems, which are able to operate effectively at low- and intermediate temperature ranges. The improvement of their electrochemical characteristics is feasible through the optimization of their functional materials. In the present work, emphasis is given to the highly conductive and stable cerate-zirconate electrolytes of BaCe0.5Zr0.3Ln0.2O3−δ (where Ln = Y, Dy, Sm and Nd). Studying the transport properties of these materials in individual form and in PCFC assembly, it is shown that the Dy-doped sample exhibits higher grain (bulk) and grain boundary conductivity in comparison with the most studied Y-doped ones. The single PCFC based on a rather thick 30 μm electrolyte displays about 160 and 290 mW cm−2 at 600 and 700 °C, respectively. These values are comparative with those obtained for PCFCs fabricated with similar electrolytes and Co-free cathode materials, confirming the perspective of cerate-zirconates doped by other lanthanides. © 2017 Elsevier B.V.
Collections
Related items
Showing items related by title, author, creator and subject.
-
Phase-Field Modeling of Nugget Zone for a AZ31-Mg-Alloy Friction Stir Weld
Prosgolitis C.G., Lambrakos S.G., Zervaki A.D. (2018)This work presents simulation of microstructure evolution in the nugget zone (NZ) of a AZ31-Mg-alloy friction stir weld. The process parameters (tool geometrical characteristics, rotational speed, travel speed, applied ... -
Grain Size Evolution during Multipass Hot-Rolling of C-Mn Steels: Comparison of Phase Field and Extended JMAK Modeling
Tzini M.-I.T., Karamichailidou D.A., Haidemenopoulos G.N. (2018)The design of multipass hot-rolling schedules is of great importance to steel industry and an effort is made to predict the microstructure evolution. In the present study, a multi-phase field model is employed for the ... -
Fatigue failure investigation of pre-corroded and laser-welded Al-Cu-Mg-Ag Alloy with different temper condition
Zervaki, A. D.; Kermanidis, A. T.; Haidemenopoulos, G. N.; Pantelakis, S. G. (2010)The fatigue failure mechanisms of pre-corroded, laser beam welded Al-Cu-Mg-Ag alloy in different temper conditions (T3,T8) have been investigated. Aging influences the corrosion behavior of laser welds. In the T3 temper, ...