304不锈钢双极板一步电聚合制备氧化石墨烯/碳纳米管杂化增强聚吡咯涂层的微观结构、性能及协同效应

IF 7.3 2区 材料科学 Q1 CHEMISTRY, APPLIED
Ruiqing Ding , Yimeng Li , Ziliang Liu , Zhen Ma , Xiaohui Jiang , Jiaming Cao , Bin Zhao , Ke Zhan
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引用次数: 0

摘要

导电聚合物涂层具有良好的导电性和良好的耐腐蚀性,是保护质子交换膜燃料电池金属双极板的两个重要因素。通过一步电聚合,在304不锈钢(304SS)样品上制备了氧化石墨烯/碳纳米管杂化增强聚吡啶(PPY)涂层,以防止其在pemfc腐蚀性操作环境中受到腐蚀。研究了氧化石墨烯/碳纳米管杂化增强聚吡啶复合涂层的显微组织、耐蚀性和电导率。电化学测试结果表明,在低碳纳米管含量的氧化石墨烯/碳纳米管复合增强层中,氧化石墨烯/碳纳米管复合增强层具有最佳的耐腐蚀性和导电性。经优化的GO/CNTs杂化增强PPY复合涂层覆盖的304SS极化电流密度显著降低至8.62 μA/cm2,界面接触电阻为130.5 mΩ cm2。氧化石墨烯/碳纳米管/聚吡咯复合涂层具有较强的防腐性能和良好的导电性,这可归因于氧化石墨烯/碳纳米管杂化增强剂形成的导电网络以及碳增强剂与聚吡咯之间的微观相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microstructure, properties and synergistic effect of GO/CNTs hybrid reinforced polypyrrole coatings prepared by a one-step electropolymerization for 304 stainless steel bipolar plates in PEMF cells
The good electrical conductivity and excellent corrosion resistance of conductive polymer coatings are two important factors for protecting metallic bipolar plates of proton exchange membrane fuel cells (PEMFCs). Here, GO/CNTs hybrid reinforced polypyrrole (PPY) coatings were prepared on 304 stainless steel (304SS) samples to protect them against corrosion in PEMFCs corrosive operating environments by a one-step electropolymerization. The microstructure, corrosion resistance and electrical conductivity of GO/CNTs hybrid reinforced PPY composite coatings were investigated. Electrochemical testing results demonstrated that the GO/CNTs/PPY coatings achieved optimal corrosion resistance and electrical conductivity when the GO/CNTs hybrid reinforcement with a low CNTs content. The polarized current density of 304SS covered with optimized GO/CNTs hybrid reinforced PPY composite coating was significantly reduced to 8.62 μA/cm2, while the interfacial contact resistance was 130.5 mΩ cm2. The enhanced corrosion protection and good electrical conductivity of the GO/CNTs/PPY composite coating can be ascribed to the conductive network formed by the GO/CNTs hybrid reinforcement and the microscopic interaction between the carbon reinforcement and the polypyrrole.
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来源期刊
Progress in Organic Coatings
Progress in Organic Coatings 工程技术-材料科学:膜
CiteScore
11.40
自引率
15.20%
发文量
577
审稿时长
48 days
期刊介绍: The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.
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