Novel sulfonated poly(ether ether ketone) with pendant benzimidazole groups as a proton exchange membrane for direct methanol fuel cells

Yang Zhang, Ke Shao, Chengji Zhao, Gang Zhang, Hongtao Li, Tiezhu Fu, Hui Na

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A series of sulfonated poly(ether ether ketone)s bearing pendant carboxylic acid groups (C-SPEEKs) have been prepared and subsequently react with 1,2-diaminobenzene to obtain sulfonated poly(ether ether ketone)s with pendant benzimidazole groups (BI-SPEEKs). The expected structures of the sulfonated copolymers are confirmed by 1H NMR. The resulting copolymers all show good thermal and mechanical properties. It should be noted that the introduction of benzimidazole groups into the copolymer improves its thermal and oxidative stability obviously. Meanwhile, compared to C-SPEEK, BI-SPEEK membranes show much lower water uptake and methanol permeability with the same sulfonation degree (DS). In order to study morphological changes of C-SPEEK and BI-SPEEK membranes, hydrophilic domains sizes from an atomic force microscopy (AFM) are investigated.

Original languageEnglish (US)
Pages (from-to)175-181
Number of pages7
JournalJournal of Power Sources
Volume194
Issue number1
DOIs
StatePublished - Oct 20 2009

Fingerprint

Polyether ether ketones
Direct methanol fuel cells (DMFC)
ketones
fuel cells
Protons
ethers
Ion exchange
Copolymers
methyl alcohol
membranes
Membranes
copolymers
protons
Bearings (structural)
Sulfonation
Carboxylic Acids
Carboxylic acids
Methanol
Atomic force microscopy
Thermodynamic properties

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

Cite this

Zhang, Yang ; Shao, Ke ; Zhao, Chengji ; Zhang, Gang ; Li, Hongtao ; Fu, Tiezhu ; Na, Hui. / Novel sulfonated poly(ether ether ketone) with pendant benzimidazole groups as a proton exchange membrane for direct methanol fuel cells. In: Journal of Power Sources. 2009 ; Vol. 194, No. 1. pp. 175-181.
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Novel sulfonated poly(ether ether ketone) with pendant benzimidazole groups as a proton exchange membrane for direct methanol fuel cells. / Zhang, Yang; Shao, Ke; Zhao, Chengji; Zhang, Gang; Li, Hongtao; Fu, Tiezhu; Na, Hui.

In: Journal of Power Sources, Vol. 194, No. 1, 20.10.2009, p. 175-181.

Research output: Contribution to journalArticle

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T1 - Novel sulfonated poly(ether ether ketone) with pendant benzimidazole groups as a proton exchange membrane for direct methanol fuel cells

AU - Zhang, Yang

AU - Shao, Ke

AU - Zhao, Chengji

AU - Zhang, Gang

AU - Li, Hongtao

AU - Fu, Tiezhu

AU - Na, Hui

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AB - A series of sulfonated poly(ether ether ketone)s bearing pendant carboxylic acid groups (C-SPEEKs) have been prepared and subsequently react with 1,2-diaminobenzene to obtain sulfonated poly(ether ether ketone)s with pendant benzimidazole groups (BI-SPEEKs). The expected structures of the sulfonated copolymers are confirmed by 1H NMR. The resulting copolymers all show good thermal and mechanical properties. It should be noted that the introduction of benzimidazole groups into the copolymer improves its thermal and oxidative stability obviously. Meanwhile, compared to C-SPEEK, BI-SPEEK membranes show much lower water uptake and methanol permeability with the same sulfonation degree (DS). In order to study morphological changes of C-SPEEK and BI-SPEEK membranes, hydrophilic domains sizes from an atomic force microscopy (AFM) are investigated.

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