摘要
利用电化学方法沉积纳米导电聚苯胺膜对质子交换膜燃料电池(PEMFC)用薄层金属双极板改性,并对改性双极板在模拟PEMFC阳极环境下的电化学性能进行了测试。结果表明,纳米聚苯胺膜层能使1Cr18Ni9Ti不锈钢在模拟腐蚀液中的腐蚀电位由-350mV提高到250mV。在模拟阳极操作电位下,经10h恒电位极化没有观察到膜层的降解和脱落。纳米导电聚苯胺膜层能显著提高不锈钢在模拟电池环境下的耐蚀性而不影响其导电性,进一步提高导电聚合物涂层性能和评价其长期效果还需进行深入的研究。
By using electrochemical techniques, nanoparticle polyaniline （PANi） coating was synthesized on the surface of 1Cr18Ni9Ti stainless steel （1Cr18Ni9Ti SS）, The electrochemical behavior of coated 1Cr18Ni9Ti SS was investigated in simulated proton exchange membrane fuel ceil （PEMFC） environment. The results indicate that the corrosion potential of coated steel is improved from -350 mV to 250 mV in simulated corrosion solution, PANi nanoparticle coatings can improve 1Cr18Ni9Ti SS corrosion resistance remarkably, No degradation and dropout take place in PANi coating under the typical load potential of fuel cell for 10 h. At the same time, the 5 cm^2 fuel cell performance of PANi coated bipolar plates is higher than that of bare bipolar plates. Further effort to improve the performance of conductive polymer coatings and to estimate the long-term effort in actual PEMFC environment is deserved.
出处
《电源技术》
CAS
CSCD
北大核心
2007年第3期217-219,共3页
Chinese Journal of Power Sources
