增强金属基双极板导电和耐腐蚀性能的石墨烯基涂层的研究进展

应用于金属基双极板的石墨烯基涂层引起人们广泛的兴趣。综述了目前金属基双极板面临的问题，总结了已经报道的关于制备石墨烯基涂层的方法（化学气相沉积法、电沉积法、喷涂法、自组装方法）以及这些方法的优缺点。石墨烯优良的阻隔性能可以充当金属基双极板的钝化膜，对石墨烯进行改性或者对金属基双极板进行表面处理可以有效地改善石墨烯涂层与金属基双极板的相容性。导电聚合物可以有效地改善石墨烯涂层与金属基之相容性，并且能够填补石墨烯片层间的缝隙，提高涂层的致密度。导电聚合物能够以石墨烯为模板进行生长，降低涂层的表面粗糙度。最后提出对石墨烯改性以增强其与金属基双极板的相容性，以及发挥其与导电聚合物协同效应是未来的研究方向之一。

Recent progress in graphene-based coatings for enhancing anti-corrosion and electric conductivity of metal-based bipolar plates

The graphene-based coatings used for metal-based bipolar plates have attracted widespread interest. The review outlines the problems of metal-based bipolar plates in the working environment of fuel cells and also summarizes preparation methods of graphene-based coating (chemical vapor deposition, electrodeposition, spray, self-assembling) and their advantages and disadvantages. The excellent barrier properties of graphene can act as a passive film on the surface of bipolar plate. The modification of graphene and surface treatment of metal bipolar plates are useful ways to enhance the compatibility of graphene-based coating and metal-based bipolar plates. The addition of conductive polymer can effectively improve the compatibility between graphene and metal bipolar plates and fill the voids between graphene nanoplates to increase bulk density of coatings. Graphene can be used as a template for conductive polymer growth, reducing the roughness of the composite coating facilitating interfacial contact resistance of composite coatings. Finally, it is proposed that the modification of graphene to enhance its compatibility with metal-based bipolar plates and exert its synergistic effect with conductive polymers will be one of the future research directions.