Investigation of Solvent and Carbon Particles Behavior during Drying Process from Catalyst Ink to Catalyst Layer
Investigation of Solvent and Carbon Particles Behavior during Drying Process from Catalyst Ink to Catalyst Layer
复制标题
从催化剂油墨到催化剂层干燥过程中溶剂和碳颗粒行为的研究
DOI：
10.1149/06917.0465ecst
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. Tsuhima
中科院分区：
文献类型：
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作者：
T. Suzuki;M. Kobayashi;H. Tanaka;M. Hayase;S. Tsuhima
测定了由溶剂、碳和离聚物组成的浆料的电阻和蒸发速率。电阻用四点探头测量，蒸发速率用电天平监测。干燥是制备质子交换膜燃料电池催化剂层等多孔电极的关键工艺。碳粒子的行为影响形成的多孔结构，从而影响电池的性能。溶剂蒸发对于了解浆料干燥过程的动力学也很重要。电阻和重量变化分别代表碳团聚和溶剂蒸发。测定了含碳量不同的三种浆料。含碳量越高，浆料的结块和干燥时间越短。低碳料浆的结块时间和干燥时间差异较大。这一结果表明，团聚过程不仅仅是通过溶剂蒸发进行的。
The electrical resistance and evaporation rate of a slurry composed of a solvent, carbon and ionomer were measured. Electrical resistance was measured with a four-point probe, and the evaporation rate was monitored with an electric balance. The drying is a key process for porous electrode fabrication such as catalyst layers used in proton exchange membrane fuel cells. Carbon particles behavior affects a formed porous structure, and it can affect cell performance. Solvent evaporation is also important to understand dynamics in the drying process of the slurry. Electrical resistance and weight variation represent carbon agglomeration and solvent evaporation, respectively. Three types of the slurry which differ in carbon content were measured. The higher carbon content slurry took a shorter time for agglomeration and drying. The difference of the agglomeration time and the drying time is larger in the low carbon content slurry. This result indicates that the agglomeration proceed not only by solvent evaporation.