A facile approach to prepare self-cross-linkable sulfonated poly(ether ether ketone) membranes for direct methanol fuel cells

Hongtao Li, Gang Zhang, Jing Wu, Chengji Zhao, Qiong Jia, Christopher M. Lew, Liyuan Zhang, Yang Zhang, Miaomiao Han, Jing Zhu, Ke Shao, Jing Ni, Hui Na

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Sulfonated poly(ether ether ketone) containing hydroxyl groups (SPEEK-OH) has been prepared for use as a proton exchange membrane (PEM) by reducing the carbonyl groups on the main chain of the polymers. With the goal of reducing water uptake and methanol permeability, a facile thermal-cross-linking process is used to obtain the cross-linked membranes. The properties of the cross-linked membranes with different cross-linked density are measured and compared with the pristine membrane. Notably, SPEEK-4 with the highest cross-linked density shows a water uptake of 39% and a methanol permeability of 2.52 × 10 -7 cm2 s-1, which are much lower than those of the pristine membrane (63.2% and 5.37 × 10-7 cm2 s-1, respectively). These results indicate that this simple approach is very effective to prepare cross-linked proton exchange membranes for reducing water uptake and methanol permeability.

Original languageEnglish (US)
Pages (from-to)8061-8066
Number of pages6
JournalJournal of Power Sources
Volume195
Issue number24
DOIs
StatePublished - Jul 29 2010

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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