About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Ceramics for Clean Hydrogen
|
| Presentation Title |
Compositionally Complex Ceramics: A Review with an Example of Compositionally Complex Perovskite Oxides for Solar Thermochemical Water Splitting |
| Author(s) |
Jian Luo, Xingbo Liu, Yue Qi, Wei Li, Dawei Zhang, Héctor A De Santiago, Boyuan Xu, Cijie Liu, Jiyun Park, Joshua D Sugar, Eric N Coker, Anthony McDaniel, Stephan Lany |
| On-Site Speaker (Planned) |
Jian Luo |
| Abstract Scope |
In this talk, we will first review a series of our earlier studies to explore high-entropy ceramics (HECs), including five- to 21-component MB2, MB, M3B4, and MB4 borides, MSi2 and M3Si5 silicides, and perovskite, fluorite, and weberite oxides [see a review and perspective: J. Mater. Sci. 55:9812 (2020)]. We further proposed to extend HECs to "compositionally complex ceramics (CCCs)" [JECS 40:2120 (2020); J. Mater. Sci. 55:9812 (2020)] in include non-equimolar compositions and short- and long-range ordering that reduce configurational entropies but offer additional dimensions to tailor and improve properties. A recent focus is on the exploration of new compositional spaces for advanced energy applications, including compositionally complex perovskite oxides (CCPOs) solid electrolytes [Matter 6:2395 (2023)] and compositionally complex fluorite-based oxides (CCFBOs) for thermal barrier coatings. As an example, we will discuss our recent collaborative efforts to investigate CCPOs for solar thermochemical hydrogen generation [Chem. Mater. 35:1901 (2023); JMCA 12:3910 (2024)]. |