Development of novel oxygen ion and electron conducting ceramic cathodes for solid oxide fuel cells

该博士项目将开发、合成和表征用于sofc阴极的新型混合离子-电子导电（MIEC）材料。该项目将研究如何将钙钛矿晶体结构操纵成双钙钛矿（DP）和Ruddlesden-Popper系列（R-P），并将这些系列组织成空心球形颗粒，影响氧还原反应（ORR）的活性。由于氧空位沿该晶体平面排列有序，对晶体结构的操纵将促进氧离子和电子沿着独特的快速迁移晶体平面更好地传导。与块状材料相比，空心球颗粒具有更低的面积比电阻（ASR）、更大的三相边界表面积（TPB）和更高的燃气利用率，从而提高了ORR率和效率。

This PhD project will develop, synthesise, and characterise novel mixed ion-electron conducting (MIEC) materials to be used as cathodes in SOFCs. The project will investigate how the manipulation of perovskite crystal structures into double perovskites (DP) and Ruddlesden-Popper series (R-P), and organising these series into hollow sphere grains, effects the activity of the oxygen reduction reaction (ORR).The manipulation of the crystal structure will facilitate better oxygen ion and electronic conduction along a unique fast migration crystallographic plane, due to the ordering of oxygen vacancies along this crystallographic plane. The hollow sphere grains will increase the ORR rate and efficiency when compared with bulk materials, due to lower area specific resistance (ASR), increased surface area of the triple phase boundary (TPB), and higher fuel gas availability.