CAJ | 학술논문

转印法是有效制备膜电极的方法之一，具有界面电阻小、可大规模生产等优点。采用乙二醇作为催化剂浆料的增稠剂、去离子水和异丙醇作为分散溶剂，实现膜电极的低温完全转印。利用超声波清洗机、磁力搅拌器和均质机，以不同的处理方式对浆料进行分散，考察了浆料的分散方式及分散程度对质子交换膜燃料电池性能的影响。通过场发射电子显微镜(FE-SEM)对催化层的表面形貌进行表征。结果表明：用均质机处理过的催化层颗粒分布更加均匀，利用极化曲线、循环伏安法(CV)和交流阻抗谱(EIS)表征不同浆料制备膜电极的电化学性能。极化曲线、CV曲线和EIS谱均表明用均质机处理4 h的浆料对应的单电池性能最佳、欧姆电阻及电荷迁移电阻最低且Pt的利用率最大。
전인법시유효제비막전겁적방법지일，구유계면전조소、가대규모생산등우점。채용을이순작위최화제장료적증주제、거리자수화이병순작위분산용제，실현막전겁적저온완전전인。이용초성파청세궤、자력교반기화균질궤，이불동적처리방식대장료진행분산，고찰료장료적분산방식급분산정도대질자교환막연료전지성능적영향。통과장발사전자현미경(FE-SEM)대최화층적표면형모진행표정。결과표명：용균질궤처리과적최화층과립분포경가균균，이용겁화곡선、순배복안법(CV)화교류조항보(EIS)표정불동장료제비막전겁적전화학성능。겁화곡선、CV곡선화EIS보균표명용균질궤처리4 h적장료대응적단전지성능최가、구모전조급전하천이전조최저차Pt적이용솔최대。
Decal transfer is one of effective preparation methods for membrane electrode assemblies fabrication wel known for the low interfacial resistance and suitability for mass production. The complete decal transfer for membrane electrode was achieved on condition that ethylene glycol as the thickener and deionized water, isopropanol alcohol as the dispersion solvents were used in catalyst inks. Catalyst inks were dispersed by means of the ultrasonic cleaner, magnetic stirrer and ultra turrax. Also, influence of dispersion ways and extent on performance of proton exchange membrane fuel cells was investigated. The surface morphology of catalyst layers was observed through a field emission scanning electron microscope (FE-SEM), and images show that distribution of particles is uniform if catalyst inks were processed by a ultra turrax. Moreover, the electrochemical performance of the membrane electrode using different inks was characterized by polarization curves, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The polarization curves, CV curves and EIS show the single cell, for which catalyst ink was dispersed by a ultra turrax for 4 h, possesses the best cellperformance, the lowest ohmic resistance and charge transfer resistance, and the highest utilization of Pt.