Impact of Nonadsorbed Ionomer on Viscosity of Catalyst Inks for Polymer Electrolyte Fuel Cells

被引：27
|
作者：
Yoshimune, Watru [1 ]
Harada, Masashi [1 ]
机构：
[1] Toyota Cent Res & Dev Labs Inc, 41-1 Yokomichi, Nagakute, Aichi 4801192, Japan
来源：
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2020年 / 93卷 / 02期
关键词：
CV-SANS; PEFC; Ionomer; DISPERSION STABILITY; DILUTE-SOLUTIONS; WATER; PERFORMANCE; SCATTERING; MIXTURES; NAFION; PEMFC;
D O I：
10.1246/bcsj.20190321
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In a catalyst ink for polymer electrolyte fuel cells (PEFCs), some of the ionomer is adsorbed on the carbon-supported Pt catalyst (Pt/C), which enhances the ink stability, while the rest is dispersed in the solvent as a nonadsorbed ionomer. To clarify the effect of nonadsorbed ionomer on the ink viscosity, the amount of nonadsorbed ionomer in the catalyst ink was evaluated by small-angle neutron scattering (CV-SANS). At high-shear viscosity, the nonadsorbed ionomer was found to act as ionomer solution described by the Huggins equation. Moreover, comparison with the CV-SANS results revealed that the conventional filtration method overestimates the amount of nonadsorbed ionomer in a catalyst ink.
引用
收藏
页码：302 / 307
页数：6
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