Corrosion Behavior and Conductivity of TiNb and TiNbN Coated Steel for Metallic Bipolar Plates

被引:26
作者
Shi, Kun [1 ]
Li, Xue [1 ]
Zhao, Yang [1 ]
Li, Wei-Wei [1 ]
Wang, Shu-Bo [1 ]
Xie, Xiao-Feng [1 ,2 ]
Yao, Li [3 ]
Jensen, Jens Oluf [4 ]
Li, Qing-Feng [4 ]
机构
[1] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Shanxi Res Inst Clean Energy, Taiyuan 030032, Shanxi, Peoples R China
[3] SAIC Motor Corp Ltd, Adv Technol Dept, Shanghai 201804, Peoples R China
[4] Tech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark
来源
APPLIED SCIENCES-BASEL | 2019年 / 9卷 / 12期
基金
国家重点研发计划;
关键词
coating; metallic bipolar plate; PEMFC; TiNb; TiNbN; INTERFACIAL CONTACT RESISTANCE; STAINLESS-STEEL; PERFORMANCE; COMPOSITE; TITANIUM; ALLOY; OXIDATION; COATINGS; PEMFC;
D O I
10.3390/app9122568
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
To improve corrosion resistance and electronic conductivity of bipolar plates for proton exchange membrane fuel cell (PEMFC), coatings of TiNb and TiNbN on 316L stainless steel (SS) were prepared by magnetron sputtering. X-ray diffraction (XRD) measurements confirmed the existence of metallic nitrides in the TiNbN coating. Scanning electron microscope (SEM) tests showed that the deposited coatings provided smooth surfaces. Further electrochemical measurements indicated that the corrosion resistance of TiNb coating was significantly higher than that of substrate. At 0.19 V vs MSE, the long-term stabilized current density of TiNb/316L SS was lower than 1 mu Acm(-2). The interfacial contact resistance (ICR) values between coating and carbon paper suggested that TiNb and TiNbN films had better contact conductivity than 316L SS substrate. In conclusion, TiNb coated 316L SS metallic bipolar plate material is a promising option for PEMFC.
引用
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页数:12
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