Tunable aggregation of short-side-chain perfluorinated sulfonic acid ionomers for the catalyst layer in polymer electrolyte membrane fuel cells
| Autor: | Keun-Hwan Oh, Soonyong So, Dahye Choi, Hongsuk Kang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology 02 engineering and technology Polymer Electrolyte Sulfonic acid 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Solvent chemistry.chemical_compound Fuel Technology Membrane chemistry Chemical engineering Dipropylene glycol Side chain 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | International Journal of Hydrogen Energy. 45:19891-19899 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.05.128 |
| Popis: | We control the aggregation of short-side-chain (SSC) perfluorinated sulfonic acid (PFSA) ionomers for catalyst-layer (CL) inks by using a dispersion solvent of dipropylene glycol (DPG) and water. By increasing the fraction of PFSA backbone preferable DPG content in a dispersion solvent, the size of SSC-PFSA aggregates decreases exponentially from microscale to nanoscale, affecting the catalyst-ionomer agglomerates’ size and distribution in the CL inks. The surface morphology and porosity properties of the resulting CL are investigated, and the fuel cell performances are studied at two different humidity conditions (50 and 100% RH). Compared to the previous study with long-side-chain (LSC) PFSA ionomers, the SSC-PFSA ionomers show the optimized performance at higher DPG content, where the solvating power is intermediate for SSC-PFSA ionomers having shorter hydrophilic side chain than LSC-PFSA ionomers. |
| Databáze: | OpenAIRE |
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