Tailoring high-temperature stability and electrical conductivity of high entropy lanthanum manganite for solid oxide fuel cell cathodes

Abstract

Optimum (La0.2Nd0.2Sm0.2Ca0.2Sr0.2)MnO3 exhibits excellent high-temperature resistance to elemental segregation and chemical compatibility with 8YSZ while maintaining good electrical conductivity.

High-throughput oxygen chemical potential engineering of perovskite oxides for chemical looping applications

“…These perovskites with five or more cations, also known as high-entropy perovskites (HEPs), 71 are an emerging class of new materials with unique redox properties and stability for various thermochemical applications. 87 Herein, 227,273 high-entropy perovskite compositions, prescreened out of 264,110 compositions based on the Goldschmidt's tolerance factor, were calculated. We elected not to use the modified tolerance factor for the preliminary screening due to the high complexity of the 5 cation elements perovskites, especially for those containing 4 B-site cations (SrFe 1− y 1− y 2− y 3 B1 y 1 B2 y 2 B3 y 3 O 3− δ ), which greatly increase the degree of uncertainties.…”

High Entropy Approach to Engineer Strongly Correlated Functionalities in Manganites

“…To date, there are three reports available on HE-Mn. [30][31][32] In the first report, the studied HE-Mn system exhibited a single-phase solid solution only at elevated temperatures, as indicated by the operando high-temperature X-ray diffraction (XRD) measurements. [30] In the later studies, composition modulation allowed the stabilization of phase-pure HE-Mn at room temperature.…”

Ionic liquid-hydroxide-mediated low-temperature synthesis of high-entropy perovskite oxide nanoparticles

“…ABO 3 -type perovskites are an important class of functional materials, which have been extensively studied for their variable formulae, flexible structures and numerous unique properties, making them desirable in different areas of applications: optics, photovoltaics, electronics, magnetics, catalysis, sensing, etc . 13 Introducing the high-entropy concept to perovskite oxides can expand the selection range for material design and tailor the functional properties of materials, providing a new platform for broad applications such as catalysis, 14 energy storage, 15–17 electronics 18,19 and magnetics. 20,21…”

“…ABO 3 -type perovskites are an important class of functional materials, which have been extensively studied for their variable formulae, flexible structures and numerous unique properties, making them desirable in different areas of applications: optics, photovoltaics, electronics, magnetics, catalysis, sensing, etc. 13 Introducing the high-entropy concept to perovskite oxides can expand the selection range for material design and tailor the functional properties of materials, providing a new platform for broad applications such as catalysis, 14 energy storage, [15][16][17] electronics 18,19 and magnetics. 20,21 Recently, a wide range of approaches for the synthesis of HEPOs have been reported, including the solid phase sintering method, 22 nebulised spray pyrolysis method, 23 reactive spark plasma sintering method, 24 sol-gel method, 25 coprecipitation hydrothermal method 26 and pulsed laser deposition method.…”