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直接甲醇燃料电池膜电极催化层的电流体动力雾化沉积

发表时间:2012-09-30  浏览量:1257  下载量:575
全部作者: 王大志,李杨,王亮,梁军生,刘冲
作者单位: 大连理工大学辽宁省微纳米技术及系统重点实验室
摘 要: 分别以Pt/C和Pt-Ru/C纳米催化剂悬浮液为研究对象,利用电流体动力雾化(electrohydrodynamic atomization, EHDA)层层沉积的方法制备了直接甲醇燃料电池(direct methanol fuel cells, DMFC)的膜电极(membrane electrode assembly, MEA)。研究Pt/C和Pt-Ru/C纳米悬浮液的EHDA稳定锥-柱模式,并在此稳定锥-柱模式下,以碳纸为基底进行Pt/C和Pt-Ru/C纳米悬浮液沉积。沉积成型的阴极和阳极催化层呈现多孔、规则排列结构,其平均孔径分别为3.5 μm和 4.0 μm. 将制备好的膜电极组装成DMFC,在不同温度下对其性能进行测试分析,结果表明:在20~60℃的范围内,电池性能随着温度的上升而显著增强,当温度高于60℃时,电池性能没有明显变化。
关 键 词: 能源科学技术其他学科;催化层;电流体动力雾化;直接甲醇燃料电池;膜电极
Title: Formation of catalyst layers of membrane electrode assembly using electrohydrodynamic
Author: WANG Dazhi, LI Yang, WANG Liang, LIANG Junsheng, LIU Chong
Organization: Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology
Abstract: In this paper, Pt/C and Pt-Ru/C nano-suspension are used to prepare the membrane electrode assembly (MEA) for direct methanol fuel cells (DMFC) using electrohydrodynamic atomization (EHDA) layer-by-layer deposition method. During the EHDA deposition process, the Pt/C and Pt-Ru/C nano-suspensions produce stable cone-jet mode and the atomization characteristics are studied. Pt/C and Pt-Ru/C nano-suspension are deposited on the carbon paper to form cathode and anode catalyst layers under this stable cone-jet mode. The cathode and anode catalyst layers present porous and well-packed features. The average pore size of the cathode and anode catalyst layers is 3.5 μm and 4.0 μm, respectively. The polarization behaviour of a single DMFC assembled with the deposited MEA at different working temperatures are analysed. The results show that the cell performance increases fast when temperature increases from 20℃ to 60℃, however, the cell performance has inconspicuous difference when temperature higher than 60℃.
Key words: energy science technology and other subjects; catalyst layer; electrohydrodynamic atomization; direct methanol fuel cells; membrane electrode assembly
发表期数: 2012年9月第18期
引用格式: 王大志,李杨,王亮,等. 直接甲醇燃料电池膜电极催化层的电流体动力雾化沉积[J]. 中国科技论文在线精品论文,2012,5(18):1728-1733.
 
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