Development of coatings for solid oxide fuel cell interconnects

固体氧化物燃料电池的互连由高铬合金制成，在800℃下具有足够的耐腐蚀性，并在阴极侧涂覆掺锶锰酸镧钙钛矿(LSM)以防止铬蒸发。一个仍然存在的重大问题是与空气等离子喷涂(APS)涂层工艺相关的非常高的成本。造成成本的因素是：i)原材料价格高(约100美元/公斤)，ii)沉积效率低(通常为30%-40%的利用率)，iii)资本设备成本高，以及iv)APS工艺的产量相对较低。拟议的研究将确定可提高材料产量和降低设备资本需求的替代涂层方法。此外，它还将证明尖晶石是一种成本较低的LSM材料替代品。APS/LSM系统展示的功能将被用作衡量新材料的可接受性的指标

Interconnects for solid oxide fuel cells are made of high chromium alloy to achieve adequate corrosion resistance at 800 C and and are coated on the cathode side by strontium-doped lanthanum manganite perovskite (LSM) as a barrier against chromium evaporation. A significant problem that remains is the very high cost associated with the air plasma spray (APS) coating process. The contributing cost factors are: i) the high price of the raw material (around $100/kg), ii) the low deposition efficiency (typically 30%-40% utilization), iii) the high capital equipment cost and iv) the relatively low output of the APS process. The proposed research will identify alternative coating methods which improve material yield and reduce equipment capital requirements. In addition, it will demonstrate that spinel is a lower cost alternative to the LSM material. The demonstrated functionality of the APS/LSM system will be used as a metric to gauge the acceptability of the new materials