Increases in the proton conductivity and selectivity of proton exchange membranes for direct methanol fuel cells by formation of nanocomposites having proton conducting channels

JOURNAL OF POWER SOURCES

卷:194

Article; Proceedings Paper

Su, Yu-Huei³  Liu, Ying-Ling^1,2  Wang, Da-Ming³  Lai, Juin-Yih^1,2  Guiver, Michael D.⁴  Liu, Baijun⁵ 

[1] Chung Yuan Christian Univ, R&D Ctr Membrane Technol, Chungli 320, Taiwan

[2] Chung Yuan Christian Univ, Dept Chem Engn, Chungli 320, Taiwan

[3] Natl Taiwan Univ, Inst Polymer Sci & Engn, Taipei 104, Taiwan

[4] Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada

[5] Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China

关键词: Proton exchange membranes;    Direct methanol fuel cell;    Poly(arylene ether ether ketone ketone);    Sulfonated silica nanoparticles;   

DOI  :  10.1016/j.jpowsour.2009.05.003

来源: Elsevier

【 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 (R) 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. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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