Nanostructured Polyelectrolytes Based on SPEEK/TiO2 for Direct Ethanol Fuel Cells (DEFCs)
| Autor: | Tamirys Rodrigues dos Santos, Ailton S. Gomes, José Carlos Dutra Filho |
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| Rok vydání: | 2014 |
| Předmět: |
DEFCs
Materials science Organic Chemistry technology industry and agriculture titanium oxide lcsh:Chemical technology Direct-ethanol fuel cell Polyelectrolyte Titanium oxide chemistry.chemical_compound Membrane Chemical engineering chemistry Nafion Polymer chemistry Peek Chemical Engineering (miscellaneous) Poly(ether ether ketone) lcsh:TP1-1185 Ethanol fuel Pervaporation sulfonation |
| Zdroj: | Polímeros, Vol 24, Iss spe, Pp 43-48 (2014) Polímeros, Volume: 24, Issue: spe, Pages: 43-48, Published: 10 JUN 2014 Polímeros v.24 n.spe 2014 Polímeros (São Carlos. Online) Associação Brasileira de Polímeros (ABPol) instacron:ABPO |
| ISSN: | 1678-5169 |
| DOI: | 10.4322/polimeros.2014.069 |
| Popis: | Proton-conducting hybrid membranes consisting of poly(ether ether ketone) sulfonated (SPEEK) and titanium oxide (TiO 2 ) were prepared using the sol-gel technique for application in direct ethanol fuel cells. The effect from TiO 2 incorporation on membrane properties such as ethanol uptake, pervaporation and proton conductivity was investigated. The uptake and permeated flux decreased with increasing content of TiO 2 . The ethanol permeability was about one order of magnitude smaller than Nafion 117. FTIR spectra indicated that PEEK was sulfonated and the second degradation temperature of SPEEK58 samples confirmed the titanium oxide incorporation. The proton conductivity in ethanol solution was of the order of 10 -3 S cm -1 when 4 or 8 wt% TiO 2 were added, and generally increased with addition of TiO 2 . |
| Databáze: | OpenAIRE |
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