High proton-conducting Nafion®/-SO3H functionalized mesoporous silica composite membranes

Yu Feng Lin, Chuan Yu Yen, Chen Chi M. Ma, Shu Hang Liao, Chia Hsun Lee, Yi Hsiu Hsiao, Hong Ping Lin

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)

Abstract

A novel organic-inorganic mesoporous silica (L64 copolymer-templated mesoporous SiO2), functionalized with perfluoroalkylsulfonic acid groups analogous to that of Nafion®, was prepared. A condensation reaction between the surface silanol groups of the mesoporous silicas and 1,2,2-trifluoro-2-hydroxy-1-trifluoromethylethane sulfonic acid Beta-sultone was conducted. High proton-conducting Nafion®/functionalized mesoporous silica composite membranes were prepared via homogeneous dispersive mixing and the solvent casting method. In this investigation, the proton conductivity (σ) of the composite membrane is increased from 0.10 to 0.12 (S cm-1) as the modified mesoporous silica content is increased from 0 to 3 wt%. The methanol permeability of the composite membrane declined as the sulfonic mesoporous silica content increased. The methanol permeability of the composite membrane that contained 3 wt% M-SiO2-SO3H was 4.5 × 10-6 cm2 S-1-30% lower than that of pristine Nafion®. Results of this study demonstrate a significant improvement in the performance of DMFCs.

Original languageEnglish
Pages (from-to)388-395
Number of pages8
JournalJournal of Power Sources
Volume171
Issue number2
DOIs
Publication statusPublished - 2007 Sep 27

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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