Dispersion Control of Nano-Particles and the Effect of the Coating Condition on the Performance of Proton-Exchange Membrane Fuel Cells (PEMFCs)
Dispersion Control of Nano-Particles and the Effect of the Coating Condition on the Performance of Proton-Exchange Membrane Fuel Cells (PEMFCs)
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纳米颗粒的分散控制以及涂层条件对质子交换膜燃料电池（PEMFC）性能的影响
DOI：
10.1252/jcej.37.31
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发表时间：
2004
影响因子：
0.8
通讯作者：
K. Yasuda
中科院分区：
文献类型：
--
作者：
Mustafa;H. Usui;Ibuki Shige;Hiroshi Suzuki;Tetsuhiko Kobayashi;Y. Miyazaki;Tsutomu Ioroi;K. Yasuda
在PEMFC技术中，粒子特性和涂覆方法影响电极的性能。用于制备PEMFC电极的浆液是碳负载Pt纳米颗粒（Pt/C）在Nafion溶液中的悬浮液。通过实验和理论分析得出了该浆料的结块性质。浆液分散的信息与膜的横截面扫描电镜图像进行了比较。结果表明，在SEM图像中观察到的孔洞直径与团聚特征长度之间存在良好的相关性。采用不同加载速度制备的几种电极膜对PEMFC电极性能进行了评价。在阴极性能实验中，随着涂层速度的增加，电池电压和内阻都有轻微的增加。另一方面，在阳极性能实验的情况下，由于电池电压结果主要受阴极电催化活性的影响，因此没有发现涂层速度对结块的影响。结果表明，在本实验条件范围内，较高的涂膜速度有利于获得较好的PEMFC电极性能。
It is known that the particle characteristics and method of coating affect the performance of the electrode in PEMFC technology. The slurry to be used for the preparation of the PEMFC electrode is the suspension of carbon-supported Pt nano-particles (Pt/C) in a Nafion solution. The agglomeration nature of this slurry is obtained both experimentally and theoretically. Information on slurry dispersion is compared with the cross sectional SEM image of the membrane. It is certified that there exists a good correlation between agglomeration characteristic length and the void diameter observed in SEM images. The evaluation of PEMFC electrode performance is done by using several kinds of electrode membranes prepared under different coading speeds. Slight increases both in cell voltage and internal resistance are observed for the case of cathode performance experiments according to the increase of the coating speed. On the other hand, no effect of the coating speed is detected for the case of anode performance experiments due to the cell voltage results were affected mainly by the electrocatalytic activity of the cathode, which results in no effect of the agglomeration. It is concluded that higher coating speed is preferable to get good PEMFC electrode performance within the range of the present experimental conditions.