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| Content Provider | Springer Nature Link |
|---|---|
| Author | Park, Sung Mi Choi, Young Woo Yang, Tae Hyun Park, Jin Soo Kim, Sung Hyun |
| Copyright Year | 2012 |
| Abstract | Two different types of silica oxide were prepared as filler in sulfonated polymers for fuel cell applications operated under water deficient environment. SiO$_{2}$ nanoparticle and thiol-embedded SiO$_{2}$ nanoparticles were mechanically mixed with sulfonated (arylene ether sulfone) solutions, and then the mixtures were cast to prepare composite membranes. The composite membranes with different amount of SiO$_{2}$ were prepared to investigate the effect of two types of SiO$_{2}$ nanoparticles on ionic conductivity with relative humidity at 120 °C. In addition, ion exchange capacity, water uptake, thermogravitational analysis, differential scanning calorimetry were studied. As results, the composite membranes containing thiol-embedded SiO$_{2}$ showed better water-channel forming ability at low relative humidity less than 50% in this study. Under full hydration of the composite membranes, the composite membranes containing pure SiO$_{2}$ nano-particles have higher ionic conductivity since the thiol-embedded SiO$_{2}$ might cause steric hindrance to make water channel well connected. Thus, below 50% relative humidity, the composite membranes containing 10 wt% of thiol-embedded SiO$_{2}$ showed the best ionic conductivity. It is very promising for polymer electrolyte fuel cells operated normally under 50% relative humidity at cathode. |
| Starting Page | 87 |
| Ending Page | 94 |
| Page Count | 8 |
| File Format | |
| ISSN | 02561115 |
| Journal | Korean Journal of Chemical Engineering |
| Volume Number | 30 |
| Issue Number | 1 |
| e-ISSN | 19757220 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2013-02-07 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Silica Composite Membrane Proton Conductivity Low-humidified Polymer Electrolyte Membrane Fuel Cell Industrial Chemistry/Chemical Engineering Catalysis Materials Science Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Chemical Engineering |
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