Skutina Lubov, Filonova Elena, Medvedev Dmitry, Maignan Antoine
Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry, 620137 Yekaterinburg, Russia.
Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Yekaterinburg, Russia.
Materials (Basel). 2021 Mar 31;14(7):1715. doi: 10.3390/ma14071715.
The chemical design of new functional materials for solid oxide fuel cells (SOFCs) is of great interest as a means for overcoming the disadvantages of traditional materials. Redox stability, carbon deposition and sulfur poisoning of the anodes are positioned as the main processes that result in the degradation of SOFC performance. In this regard, double perovskite molybdates are possible alternatives to conventional Ni-based cermets. The present review provides the fundamental properties of four members: SrNiMoO, SrMgMoO, SrFeMoO and SrFeMoO. These properties vary greatly depending on the type and concentration of the 3d-element occupying the B-position of ABB'O. The main emphasis is devoted to: (i) the synthesis features of undoped double molybdates, (ii) their electrical conductivity and thermal behaviors in both oxidizing and reducing atmospheres, as well as (iii) their chemical compatibility with respect to other functional SOFC materials and components of gas atmospheres. The information provided can serve as the basis for the design of efficient fuel electrodes prepared from complex oxides with layered structures.
作为克服传统材料缺点的一种手段，用于固体氧化物燃料电池（SOFC）的新型功能材料的化学设计备受关注。阳极的氧化还原稳定性、积碳和硫中毒被视为导致SOFC性能退化的主要过程。在这方面，双钙钛矿钼酸盐是传统镍基金属陶瓷的可能替代品。本综述介绍了四个成员的基本性质：SrNiMoO、SrMgMoO、SrFeMoO和SrFeMoO。这些性质因占据ABB'O结构B位的3d元素的类型和浓度而有很大差异。主要重点在于：（i）未掺杂双钼酸盐的合成特点，（ii）它们在氧化和还原气氛中的电导率和热行为，以及（iii）它们与其他功能性SOFC材料和气体气氛成分的化学相容性。所提供的信息可为设计由具有层状结构的复合氧化物制备的高效燃料电极提供依据。
