分散方式对PEMFC微孔层油墨流变特性与微结构的影响研究  

Effect of Dispersion on Rheological Properties and Microstructure of PEMFC Microporous Layer Ink

作　　者：陈梦言 杜少杰 张恒 张锐明[2,3] 唐浩林 隋邦傑 CHEN Mengyan;DU Shaojie;ZHANG Heng;ZHANG Ruiming;TANG Haolin;SUI Pangchieh(School of Automotive Engineering,Wuhan University of Technology,Wuhan 430074,China;Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Foshan 528200,China;Guangdong Hydrogen Energy Institute of WHUT,Foshan 528200,China;School of Automotive and Traffic Engineering,Jiangsu University of Technology,Changzhou 213001,China;State Key Laboratory of Advanced Technology For Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430074,China)

机构地区：[1]武汉理工大学汽车工程学院,武汉430072 [2]先进能源科学与技术广东省实验室佛山分中心(佛山仙湖实验室),佛山528200 [3]广东省武理工氢能产业技术研究院,佛山528200 [4]江苏理工学院汽车与交通工程学院,常州213001 [5]武汉理工大学材料复合新技术国家重点实验室,武汉4430072

出　　处：《工程热物理学报》2023年第6期1473-1480,共8页Journal of Engineering Thermophysics

基　　金：广东省重点领域研发计划项目(No.2019B090909003);先进能源科学与技术广东省实验室佛山分中心(佛山仙湖实验室)开放基金(No.XHD2020-004)。

摘　　要：制备高性能的微孔层对于提升质子交换膜燃料电池性能至关重要,其中微孔层油墨的制备是微孔层制备中的核心环节,油墨的分散方式和分散时长均会影响微孔层的性能。在本文中,研究了在两种不同的分散方式及三种不同分散时长下:超声分散(15 min,30 min,45 min)和球磨分散(1 h,2 h,3 h),对微孔层性能的影响,并对微孔层油墨进行了流变性研究、粒径分布和形貌表征以及BET测试。研究结果表明:球磨分散与超声分散制备的微孔层油墨呈现不同的流变性,前者黏度20 m Pa·s明显高于后者2 mPa·s,粒径分布也因分散方式不同呈现明显差异。球磨分散方式制备的微孔层表面出现明显的团聚絮状物,增加了表面粗糙度,同时该制备方式下的微孔层比表面积为9.2922 m^(2)·g^(-1)。同样制备时长也会对微孔层性能产生影响,研究发现球磨分散2 h制备的微孔层展示了更高的优越性。Fabricating high-performance microporous layers is essential to improve the performance of proton exchange membrane fuel cells,of which the fabrication of microporous layer inks is a central part.In this paper,the effects of two different dispersion methods and three different dispersion times:sonication(15 min,30 min,45 min)and ball milling(1 h,2 h,3 h)on the performance of the microporous layer were investigated,and the ink was subjected to rheological studies,particle size distribution and morphological characters as well as BET tests.The results show that the rheological properties of the microporous layer inks fabricated by ball milling and sonication are different,the viscosity of the former was significantly higher at 20 mPa.s than the latter at 2 mPa-s,and the particle size distribution also showing significant diferences depending on the dispersion method.The surface roughness of the microporous layer was increased by the presence of agglomerated focs on the surface of the layer prepared by ball milling,while the porosity of the layer fabricated by this method was 9.2922 m^(2)·g^(-1).The length of fabrication also had an impact on the performance of the microporous layer,and it was found that the microporous layer fabricated by ball milling for 2 h showed a higher degree of superiority.

关 键 词：微孔层 球磨分散 超声分散 超声喷涂 流变性 

分 类 号：TH3[机械工程—机械制造及自动化]