Transfer Efficiency and Morphology of Different Concentrations of Catalyst Ink in Fuel Cell Electrode Preparation
Norhazirah Azhar, Thye-Foo Choo, Nur Ubaidah Saidin, Nurazila Mat Zali
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70% confidenceThis study investigates the transfer efficiency and morphology of different concentrations of catalyst ink in fuel cell electrode preparation, using a direct catalyst ink spraying approach.
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Abstract
In the fabrication of fuel cell electrodes, applying catalyst ink onto a substrate is crucial. The performance of the proton exchange membrane fuel cell (PEMFC) is subsequently impacted by how the catalyst is applied onto substrate as well as in terms of its resulting morphology. In this study, a direct catalyst ink spraying approach was done in order to investigate transfer efficiency and surface morphology for different concentrations of ink. The concentration of catalyst ink used in the spraying process are 0.5, 1.0, 1.5, 2.0 and 2.5 mg/ml with fixed loading of 1.0 mg/cm 2 . The transfer efficiency of the catalyst inks was calculated neglecting human error during spraying. The coating thickness and distribution of the resulting catalysts were analysed via Field Emission – Scanning Electron Microscope (FESEM).
Key findings
- Transfer efficiency of catalyst ink increases with concentration up to 2.0 mg/ml, but decreases at 2.5 mg/ml.
- FESEM analysis shows that coating thickness and distribution are optimal at 1.5 mg/ml concentration.
- Results suggest that optimal catalyst ink concentration for fuel cell electrode preparation is between 1.0-2.0 mg/ml.
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- Engineering Headway
- Year
- 2025