https://scholars.lib.ntu.edu.tw/handle/123456789/406374
標題: | Increases in the proton conductivity and selectivity of proton exchange membranes for direct methanol fuel cells by formation of nanocomposites having proton conducting channels | 作者: | Su Y.-H. Liu Y.-L. Wang D.-M. Lai J.-Y. Guiver M.D. Liu B. |
關鍵字: | Direct methanol fuel cell;Poly(arylene ether ether ketone ketone);Proton exchange membranes;Sulfonated silica nanoparticles | 公開日期: | 2009 | 卷: | 194 | 期: | 1 | 起(迄)頁: | 206-213 | 來源出版物: | Journal of Power Sources | 摘要: | 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 |
顯示於: | 化學工程學系 |
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