不锈钢双极板涂层-TiO2薄膜的导电耐腐蚀行为研究
Study on Conductivity and Corrosion Resistance of TiO2 Films Coated With Stainless Steel Bipolar Plates
倪亚1
作者信息
- 1. 上海氢晨新能源科技有限公司,上海 200241
- 折叠
摘要
为了提高燃料电池金属双极板的导电耐腐蚀性,本文采用原子层沉积(ALD)工艺,在不锈钢 316L上制备了TiO2纳米薄膜,对比了不同加热温度以及基板加热与否时薄膜的导电耐腐蚀性能.结果表明,当加热 250℃且基板不加热时,0.84 V恒电位腐蚀 24 h,双极板涂层-TiO2 薄膜的电流密度最小,为 1×10-10 A/cm2,且腐蚀前后接触电阻相对较小,导电和耐腐蚀性能均表现优异.通过XPS分析腐蚀前后薄膜表面的成分结构,发现二氧化钛保持了较稳定的结构,接触电阻增大主要源于表面C的氧化.
Abstract
In order to improve the conductive corrosion resistance of fuel cell metal bipolar plates,TiO2 nanofilms are prepared on stainless steel 316L by atomic layer deposition(ALD)process,and the conductive corrosion resistance of the films is compared with different heating temperatures and substrate heating.The results show that when the substrate is heated at 250℃and the substrate is not heated,the current density of the bipolar plate coating-TiO2 film is the smallest(1×10-10 A/cm2)for 24 h,and the contact resistance before and after corrosion is relatively small,and the conductivity and corrosion resistance are excellent.XPS analysis of the composition structure of the film surface before and after corrosion show that titanium dioxide maintained a relatively stable structure,and the increase of contact resistance is mainly due to the oxidation of surface C.
关键词
不锈钢双极板/TiO2薄膜/原子层沉积/导电性能/耐腐蚀性能Key words
stainless steel bipolar plate/TiO2 film/atomic layer deposition/conductivity/corrosion resistance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据