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，并且在阴极一侧涂有掺杂锶的镧锰矿钙钛矿（LSM），作为防止铬蒸发的屏障。空气等离子喷涂（APS）涂层工艺的高成本仍然是一个重要的问题。造成成本的因素是：1)原材料价格高（约100美元/公斤），2)沉积效率低（通常利用率为30%-40%），3)资本设备成本高，4)APS工艺的产量相对较低。拟议的研究将确定替代涂层方法，以提高材料产量并减少设备资本要求。此外，它将证明尖晶石是LSM材料的低成本替代品。APS/LSM系统的演示功能将用作衡量新材料可接受性的度量标准

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