https://scholars.lib.ntu.edu.tw/handle/123456789/406374
Title: | Increases in the proton conductivity and selectivity of proton exchange membranes for direct methanol fuel cells by formation of nanocomposites having proton conducting channels | Authors: | Su Y.-H. Liu Y.-L. Wang D.-M. Lai J.-Y. Guiver M.D. Liu B. |
Keywords: | Direct methanol fuel cell;Poly(arylene ether ether ketone ketone);Proton exchange membranes;Sulfonated silica nanoparticles | Issue Date: | 2009 | Journal Volume: | 194 | Journal Issue: | 1 | Start page/Pages: | 206-213 | Source: | Journal of Power Sources | Abstract: | We explore an approach to effectively enhance the properties of cost-effective hydrocarbon proton-exchange membranes for application in the direct methanol fuel cell (DMFC). This approach utilizes sulfonated silica nanoparticles (SA-SNP) as additives to modify sulfonated poly(arylene ether ether ketone ketone) (SPAEEKK). The interaction between the sulfonic acid groups of SA-SNP and those of SPAEEKK combined with hydrophilic-hydrophobic phase separation induce the formation of proton conducting channels, as evidenced by TEM images, which contribute to increases in the proton conductivity of the SPAEEKK/SA-SNP nanocomposite membrane. The presence of SA-SNP nanoparticles also reduces methanol crossover in the membrane. Therefore, the SPAEEKK/SA-SNP nanocomposite membrane shows a high selectivity, which is 2.79-fold the selectivity of Nafion?117. The improved selectivity of the SPAEEKK/SNP nanocomposite membrane demonstrates potential of this approach in providing hydrocarbon-based PEMs as alternatives to Nafion in direct methanol fuel cells. ? 2009 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/406374 | ISSN: | 03787753 | DOI: | 10.1016/j.jpowsour.2009.05.003 |
Appears in Collections: | 化學工程學系 |
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