张勇,李强,伍彩虹,符明君,马江,孙也泽谋.SOFCs金属连接体表面改性Mn-Co尖晶石涂层研究现状[J].表面技术,2023,52(9):1-9.
ZHANG Yong,LI Qiang,WU Cai-hong,FU Ming-jun,MA Jiang,SUN Ye-ze-mou.Research Progress of Modified Mn-Co Spinel Coating of SOFCs Metal Interconnect[J].Surface Technology,2023,52(9):1-9 |
| SOFCs金属连接体表面改性Mn-Co尖晶石涂层研究现状 |
| Research Progress of Modified Mn-Co Spinel Coating of SOFCs Metal Interconnect |
| 投稿时间：2022-05-31 修订日期：2022-09-08 |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.09.001 |
| 中文关键词: 固体氧化物燃料电池 Fe-Cr铁素体不锈钢 Mn-Co尖晶石涂层 改性机理 导电性 抗氧化性 |
| 英文关键词:solid oxide fuel cells Fe-Cr ferrite stainless steel Mn-Co spinel coatings modification mechanism conductivity oxidation resistance |
| 基金项目:陕西省科技计划(2020GY-278;2020ZDLGY12-07);国家自然科学基金(51301023);国家级大学生创新创业训练计划(S202110710094) |
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| Author | Institution |
| ZHANG Yong | School of Material Science and Engineering, Chang'an University, Xi'an 710064, China |
| LI Qiang | School of Material Science and Engineering, Chang'an University, Xi'an 710064, China |
| WU Cai-hong | School of Material Science and Engineering, Chang'an University, Xi'an 710064, China |
| FU Ming-jun | School of Material Science and Engineering, Chang'an University, Xi'an 710064, China |
| MA Jiang | School of Material Science and Engineering, Chang'an University, Xi'an 710064, China |
| SUN Ye-ze-mou | School of Material Science and Engineering, Chang'an University, Xi'an 710064, China |
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| 中文摘要: |
| Fe-Cr铁素体不锈钢是中低温固体氧化物燃料电池(SOFCs)的理想连接体材料，但其在高温有氧环境中表面易被氧化，且会引起阴极“Cr毒化”现象，致使电池工作效率降低。Mn-Co尖晶石因其较高的高温导电性和抗氧化性，被广泛应用于连接体保护涂层以提高连接体的抗氧化性，并减少Cr的扩散。但Mn-Co尖晶石涂层在长期服役过程中仍存在Cr元素扩散导致Cr2O3过渡氧化层不断增厚、涂层导电性能下降的现象，研究发现通过对Mn-Co尖晶石涂层进行掺杂改性可有效改善上述问题。本文结合近年来Mn-Co尖晶石涂层研究进展，简述了典型的Mn-Co尖晶石晶体结构及其导电机制，总结了改性元素在Mn-Co尖晶石中可能的掺杂位点及对尖晶石晶体结构的影响，重点阐述了稀土元素Y、La、Ce，以及过渡族元素Cu、Fe改性对Mn-Co尖晶石涂层抗氧化性、导电性、黏附性，以及热膨胀系数相容性的影响，详述了改性元素作用机理，总结对比了不同元素对Mn-Co尖晶石涂层改性的侧重点。最后，对当前研究中Mn-Co尖晶石涂层存在的问题及今后改性Mn-Co尖晶石涂层的研究方向进行了展望。 |
| 英文摘要: |
| Fe-Cr ferrite stainless steel is an ideal material for the interconnects of low and medium temperature solid oxide fuel cells (SOFCs), but its surface is easily oxidized in the high temperature aerobic environment and can cause "Cr poisoning" of the cathode, resulting in the reduction of cell efficiency. Mn-Co spinel is widely used as protective coatings for the interconnects to improve the oxidation resistance of the interconnects and reduce the diffusion of Cr. However, in the long-term service process of the Mn-Co spinel coating, there is still a phenomenon that the diffusion of Cr element leads to the continuous thickening of the Cr2O3 transition oxide layer and the decrease of the electrical conductivity of the coating. It is found that the above problems can be effectively improved by doping modification of Mn-Co spinel coatings. In this study, based on the research progress of Mn-Co spinel coating in recent years, the typical Mn-Co spinel crystal structure and its conduction mechanism were briefly described, and the possible doping sites of modified elements in Mn-Co spinel and their effects on the crystal structure of spinel were summarized. The effects of the modification of rare earth elements Y, La, Ce and transition group elements Cu and Fe on the oxidation resistance, electrical conductivity, adhesion and thermal expansion coefficient compatibility of Mn-Co spinel coatings were emphatically expounded, and the mechanism of modification elements was summarized. The focus of different elements on the modification of Mn-Co spinel coatings was summarized and compared. Finally, the problems existing in the Mn-Co spinel coating in the current research and the research direction of the modified Mn-Co spinel coating in the future were prospected. |
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