SOFC金属连接体Mn-Co尖晶石防护涂层掺杂改性研究进展

Recent Progress on Doping Modification of Mn-Co Spinel Coatings for SOFC Metallic Interconnects

摘要:

固体氧化物燃料电池（SOFC）具有能量转换效率高、燃料适用范围广等优点，具有广阔的应用前景。由于SOFC工作温度较高（600—800 ℃），金属连接体长期服役过程中会发生严重的氧化和元素挥发，导致电池性能衰退，降低其使用寿命，故而需要对金属连接体进行防护。在现有的防护涂层材料中，Mn-Co尖晶石涂层能有效抑制金属连接体的氧化和Cr挥发，被广泛用于金属连接体防护，但其高温电导率需要进一步提升。掺杂改性是一种有效提高Mn-Co尖晶石电导率和防护性能的方法。围绕Mn-Co尖晶石掺杂元素和改性方法，详细介绍了SOFC金属连接体Mn-Co尖晶石防护涂层的研究进展。

Abstract:

Solid oxide fuel cell （SOFC） has broad application prospects due to the high energy conversion efficiency and fuel adaptability. However， due to its high working temperature， the metallic interconnects will undergo severe oxidization and element volatilization during long-term service， which will lead to deterioration of cell performance and reduction of service life. Therefore， it is necessary to protect the metallic interconnects. Among the existing protective coating materials， Mn-Co spinel coatings can effectively inhibit the oxidation of metallic interconnects and Cr volatilization， and are widely used to protect metallic interconnects， but their conductivity at elevated temperature needs to be improved. Doping modification is an effective method to improve the electrical conductivity and protective properties of Mn-Co spinel. In this paper， the research progress of Mn-Co spinel protective coatings for SOFC metallic interconnects is introduced in detail with focuses on doping elements and modification methods.