Surface decorations to abrupt change performance, robustness, and stability of electrodes for solid oxide cells

Abstract

Solid oxide cell electrodes need to display a wide range of combined properties, for example, electronic and ionic conductivities, catalytic activity, chemical compatibility with other parts, thermal expansion match, phase stability, and tolerance to foreign species/contaminants. It is extremely challenging for a single material to meet all these features required. Surface decoration is a remarkably adaptive strategy to provide needed features to the electrodes by introducing functioning materials through various target‐guided methods. This review provides an overview of typical and novel techniques to create surface decoration on the electrodes to abruptly improve the drawbacks of the electrodes of solid oxide cells, including performance enhancement, stability of long‐term operation, and tolerance to poisoning foreign species. It starts with the introduction of surface decoration experimental procedure, proceeds to crucial characterization methods that are particularly effective in identifying the properties of the surface coating, continues with target‐oriented practice in terms of surface decoration materials choice and microstructure manipulation, and ends with the explorations of functioning mechanisms for the resultant behavior. With hope, the review will spark more novel utilizations of surface decoration practice to promote the technical status of the solid oxide cells for widespread commercialization in the future.

Advancements in Perovskite‐Based Cathode Materials for Solid Oxide Fuel Cells: A Comprehensive Review

“…This could be developed by controlling the particle size and sintering temperature. [48] Different researchers studied the durability and performance optimization of LSM/YSZ composite cathodes either by altering the ratio of LSM/YSZ [20,[49][50][51][52][53][54] or electrode microstructure by nanoscaling and infiltration. [55] It was shown that increasing Sr concentration up to x = 0.5 in LSM matrix for LSM-YSZ composites is advantageous for both electronic conductivity and polarization resistance.…”

“…Chen et al and Hiraldo et al provided a comprehensive analysis of how surface modification impacts the performance of electrodes in solid oxide fuel cells for a more in-depth exploration. [54,107] According to reports, the addition of metal nanoparticles such as Ag, Pd and Pr in LSCF matrix enhances their catalytic activity including oxygen adsorption, desorption, dissociation, and diffusion due to typical properties of metal nanoparticles. [108][109][110] There is extensive research on Ag nanoparticles as additive among these additives due to their cost effectiveness and their capability to facilitate oxygen adsorption, desorption, dissociation, and diffusion.…”

Conversion of MgO nanocrystal surfaces into ceramic interfaces: Exsolution of BaO as photoluminescent interface probes

“…Advances in synthesis and processing of metal oxide nanocomposites, 1 in manufacturing of powders and ceramics, and-last but not least-in materials characterization have paved the way to engineer functional interfaces inside polycrystalline materials. [2][3][4][5][6][7] This is true for a variety of approaches that aim at tuning both the grain boundary region and the free surfaces that define the residual pores. Segregation engineering and the exsolution of admixtures, which can be introduced by the synthesis of nanomaterials as nonequilibrium solids, have attracted increasing attention in this respect.…”

“…Advances in synthesis and processing of metal oxide nanocomposites, 1 in manufacturing of powders and ceramics, and—last but not least—in materials characterization have paved the way to engineer functional interfaces inside polycrystalline materials 2–7 . This is true for a variety of approaches that aim at tuning both the grain boundary region and the free surfaces that define the residual pores.…”