The effect of solvent amount for preparing catalyst layer on performance of membrane electrode assembly

• Main Authors: Chia-Hao Lee, 李家豪
• Other Authors: Hsiu-Li Lin
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/51121671574657576599

碩士 === 元智大學 === 化學工程與材料科學學系 === 101 === In this study, the influence of solvent amount in catalyst ink on the performance of Nafion-based PEMFCs was investigated. The ratios of Pt-C/ Nafion solid/IPA-H2O in catalyst ink are 2/1/160, 2/1/240, 2/1/320, and 2/1/400 (g/g/g), respectively. The Pt loading for anode is 0.2mg/ cm2, and 0.4mg/ cm2 for cathode. The prepared electrodes then were incorporated with commercial Nafion 212 membrane to prepare membrane electrodes assemblies (MEA), denominating as MEA-1, MEA-2, MEA-3, and MEA-4, respectively. The prepared MEAs were characterized by voltage-current density curves (IV), Impedance, and cyclic voltammetry (CV) experiment. For IV result, the initial performance of MEA-1 is the best among the 4 membranes prepared, but it also has the highest decay in performance after48 hrs operation. For MEA -2 &; MEA- 3, the performance is non-optimal, but both of them showed higher in stability than that of MEA 1. The test results showed the performance of MEA 4 is worst of the 4. For Impedance and CV experiment, the results is consistent with that of IV experiment (MEA 1> MEA 2>MEA 3>MEA 4).