Pikalova Elena Y, Kalinina Elena G, Pikalova Nadezhda S, Filonova Elena A
Laboratory of Solid Oxide Fuel Cells, Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg 620137, Russia.
Department of Environmental Economics, Graduate School of Economics and Management, Ural Federal University, Yekaterinburg 620002, Russia.
Materials (Basel). 2022 Dec 8;15(24):8783. doi: 10.3390/ma15248783.
In this review, recent achievements in the application of high-entropy alloys (HEAs) and high-entropy oxides (HEOs) in the technology of solid oxide fuel cells (SOFC) are discussed for the first time. The mechanisms of the stabilization of a high-entropy state in such materials, as well as the effect of structural and charge factors on the stability of the resulting homogeneous solid solution are performed. An introduction to the synthesis methods for HEAs and HEOs is given. The review highlights such advantages of high-entropy materials as high strength and the sluggish diffusion of components, which are promising for the use at the elevated temperatures, which are characteristic of SOFCs. Application of the medium- and high-entropy materials in the hydrocarbon-fueled SOFCs as protective layers for interconnectors and as anode components, caused by their high stability, are covered. High-entropy solid electrolytes are discussed in comparison with traditional electrolyte materials in terms of conductivity. High-entropy oxides are considered as prospective cathodes for SOFCs due to their superior electrochemical activity and long-term stability compared with the conventional perovskites. The present review also determines the prioritizing directions in the future development of high-entropy materials as electrolytes and electrodes for SOFCs operating in the intermediate and low temperature ranges.
在本综述中，首次讨论了高熵合金（HEAs）和高熵氧化物（HEOs）在固体氧化物燃料电池（SOFC）技术中的应用近期进展。阐述了此类材料中高熵态的稳定机制，以及结构和电荷因素对所得均匀固溶体稳定性的影响。介绍了HEAs和HEOs的合成方法。该综述强调了高熵材料的优势，如高强度和组分的缓慢扩散，这对于在SOFC特有的高温下使用很有前景。由于中高熵材料具有高稳定性，因此涵盖了它们在以烃类为燃料的SOFC中作为互连件保护层和阳极组件的应用。在电导率方面，将高熵固体电解质与传统电解质材料进行了比较。与传统钙钛矿相比，高熵氧化物因其优异的电化学活性和长期稳定性而被视为SOFC的潜在阴极。本综述还确定了高熵材料作为中低温范围内运行的SOFC的电解质和电极未来发展的优先方向。
