Enhanced corrosion resistance and fuel cell performance of Al1050 bipolar plate coated with TiN/Ti double layer
Enhanced corrosion resistance and fuel cell performance of Al1050 bipolar plate coated with TiN/Ti double layer
复制标题
DOI：
10.1016/j.enconman.2013.08.041
复制
发表时间：
2013-11
影响因子：
10.4
通讯作者：
Eun-Kyung Lee;Jung-Kon Kim;Tae-June Kim;Hannah Song;Jun-Hyuk Kim;Shin-Ae Park;Tae-Gyung Jeong;Su-Won Yun;Jaeheon Lee;Jeong-min Goo;Jung Hyuk Kim;B. Park;H. Chun;P. Song;C. Kang;Yong‐Tae Kim
中科院分区：
文献类型：
--
作者：
Eun-Kyung Lee;Jung-Kon Kim;Tae-June Kim;Hannah Song;Jun-Hyuk Kim;Shin-Ae Park;Tae-Gyung Jeong;Su-Won Yun;Jaeheon Lee;Jeong-min Goo;Jung Hyuk Kim;B. Park;H. Chun;P. Song;C. Kang;Yong‐Tae Kim
在这项研究中，我们研究了TiN/Ti和TiO 2/Ti双层涂层，金属缓冲层，对耐腐蚀性的影响，和使用它们作为PEMFC双极板的Al 1050基板的电性能。采用直流和射频磁控溅射法制备了TiN/Ti和TiO 2/Ti双层膜。分别采用货车der Pauw法和先前报道的界面接触电阻（ICR）测量方法测量了样品的表面电阻率和接触电阻。此外，使用电化学测试，如动电位和恒电位极化测试，其特征在于试样的耐腐蚀性。在这项研究中得到的结果表明，涂层的Al 1050基板显着增加了耐腐蚀性的双极板在燃料电池的操作环境相比，未涂覆的基板。特别是，与TiN/Ti双层涂层的基板表现出最好的性能：其腐蚀电流密度是30倍低于未涂覆的基板在阳极条件下。此外，在实际的燃料电池测试中，涂覆有TiN/Ti双层的Al 1050双极板显示出比未涂覆的双极板的性能增强。
In this study, we investigated the effects of TiN/Ti and TiO2/Ti double layer coatings, with a metal buffer layer, on the corrosion resistance, and electrical properties of Al1050 substrates for using them as bipolar plates in PEMFCs. TiN/Ti and TiO2/Ti double layers were deposited using the electromagnetic-field-superpositioned DC and RF magnetron sputtering method. The surface resistivity and contact resistance of the specimens were measured using the van der Pauw method and a previously reported interfacial contact resistance (ICR) measurement method, respectively. Further, the corrosion resistance of the specimens was characterized using electrochemical tests such as potentiodynamic and potentiostatic polarization tests. The results obtained in this study indicated that coating of the Al1050 substrates significantly increased the corrosion resistance of bipolar plates in the operating environment of a fuel cell when compared to uncoated substrates. In particular, the substrate coated with a TiN/Ti double layer exhibited the best performance: its corrosion current density was 30 times lower than that of an uncoated substrate under anodic conditions. Further, the Al1050 bipolar plate coated with a TiN/Ti double layer showed performance enhancement over an uncoated bipolar plate in an actual fuel cell test.