金属双极板表面改性碳基涂层研究进展  

Research Progress of Surface Modified Carbon-based Coatings for Metal Bipolar Plate

作　　者：赵蒙 周晖[1] 贵宾华 汪科良 ZHAO Meng;ZHOU Hui;GUI Bin-hua;WANG Ke-liang(Key Laboratory of Vacuum Technology and Physics,Lanzhou Institute of Physics,CAST,Lanzhou 730000,China)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《表面技术》2023年第11期182-199,共18页Surface Technology

基　　金：甘肃省青年科技基金资助项目(22JR5RA786)。

摘　　要：首先对比了贵金属涂层、氮化物涂层、碳基涂层的性能优劣,重点阐述了碳基涂层改性技术的最新研究进展。然后,以碳基涂层的设计及制备2个维度为研究切入点进行阐述。在膜系设计方面,着重分析了膜系设计和元素掺杂对碳基涂层的性能影响;在制备方面,分析了偏压、沉积时间和气体流量等对碳基涂层的化学组分、微观结构的调控作用。最后,总结了当前碳基涂层改性双极板存在的问题,主要为涂层运行寿命不足,无法达到服役标准;测试条件不统一,且模拟环境与电堆实际工况差距较大;涂层长时间服役后的失效机制不明确。同时,对金属双极板改性碳基涂层的进一步发展方向做出了展望。With the increasingly serious problems of energy and environmental pollution,the development of clean energy has become a hot issue.Proton exchange membrane fuel cell has become one of the most promising development directions in this field because of its zero emission,low operating temperature and high energy conversion efficiency.As the core component of proton exchange membrane fuel cell,bipolar plate accounts for 20%-30%of the total manufacturing cost.Its service performance and manufacturing cost have become the key factors restricting the development of fuel cell.The bipolar plate is in a high temperature and acidic corrosion environment for a long time,and has the functions of conductivity,thermal conductivity,distribution of reaction gas and drainage.Therefore,the bipolar plate requires good corrosion resistance,conductivity,hydrophobicity and durability.Although the metal bipolar plate has the advantages of easy processing and low production cost,it is difficult to avoid corrosion in an acidic environment,resulting in a decrease in fuel cell performance and service life.High-performance corrosion-resistant conductive coatings are deposited on the surface of metal bipolar plates with high machinability and low manufacturing cost by surface modification technology,which can significantly improve the service performance of metal bipolar plates.It has become one of the hotspots in the research field of fuel cell bipolar plates in recent years.On the basis of comparing the advantages and disadvantages of three typical metal bipolar plate modified coatings,such as precious metal coating, nitride coating and carbon-based coating, the work points out the development bottleneck of high production cost of precious metal coating and insufficient durability and conductivity of nitride coating. Carbon-based coating was selected as the focus of this work, and the latest research progress of carbon-based coating modified metal bipolar plate material system was expounded. In this work, the key points in the design and p

关 键 词：质子交换膜电池 双极板 碳基涂层 PVD 耐腐蚀性能 导电性能 

分 类 号：TG174[金属学及工艺—金属表面处理]