Preparation of main-chain-type and side-chain-type sulfonated poly(ether ether ketone) membranes for direct methanol fuel cell applications

Jie Cheng Tsai, Chien-Kung Lin

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Novel main-chain-type and side-chain-type sulphonated poly(ether ether ketone)s (MS-SPEEKs) are synthesised by reacting the sulphonic acid groups of pristine SPEEKs with 2-aminoethanesulphonic acid to improve the nano-phase separated morphology of the material. 1H NMR and FT-IR spectroscopy are employed to determine the structure and composition of main-chain-type and side-chain-type sulphonated polymers. Flexible and tough membranes with reasonable thermal properties are obtained. The MS-SPEEKs show good hydrolytic stability, and water uptake values ranging from 15% to 30% are observed. Compared to Nafion 117®, the methanol permeability of the MS-SPEEKs is dramatically reduced to 8.83 × 10-8 cm2 s-1 to 3.31 × 10-7 cm2 s-1. The proton conductivity increases with increasing temperature, reaching 0.013-0.182 S cm-1. A maximum power density and open circuit voltage of 115 mW cm-2 and 0.830 V are obtained at 80 °C, respectively, which is significantly greater than the values generated with Nafion 117 ®. The introduction of pendent side-chain-type sulphonic acid groups increases the single-cell performance by more than approximately 20%; thus, the lower water diffusivity, methanol permeability, electro-osmotic drag coefficient and high cell performance indicated that MS-SPEEK is a promising candidate for DMFC applications.

Original languageEnglish
Pages (from-to)9308-9316
Number of pages9
JournalJournal of Power Sources
Volume196
Issue number22
DOIs
Publication statusPublished - 2011 Nov 15

Fingerprint

Polyether ether ketones
Sulfonic Acids
Direct methanol fuel cells (DMFC)
ketones
fuel cells
Methanol
ethers
methyl alcohol
membranes
Membranes
preparation
Proton conductivity
Acids
Water
Drag coefficient
Open circuit voltage
sulfonic acid
Infrared spectroscopy
Polymers
Thermodynamic properties

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Preparation of main-chain-type and side-chain-type sulfonated poly(ether ether ketone) membranes for direct methanol fuel cell applications",
abstract = "Novel main-chain-type and side-chain-type sulphonated poly(ether ether ketone)s (MS-SPEEKs) are synthesised by reacting the sulphonic acid groups of pristine SPEEKs with 2-aminoethanesulphonic acid to improve the nano-phase separated morphology of the material. 1H NMR and FT-IR spectroscopy are employed to determine the structure and composition of main-chain-type and side-chain-type sulphonated polymers. Flexible and tough membranes with reasonable thermal properties are obtained. The MS-SPEEKs show good hydrolytic stability, and water uptake values ranging from 15{\%} to 30{\%} are observed. Compared to Nafion 117{\circledR}, the methanol permeability of the MS-SPEEKs is dramatically reduced to 8.83 × 10-8 cm2 s-1 to 3.31 × 10-7 cm2 s-1. The proton conductivity increases with increasing temperature, reaching 0.013-0.182 S cm-1. A maximum power density and open circuit voltage of 115 mW cm-2 and 0.830 V are obtained at 80 °C, respectively, which is significantly greater than the values generated with Nafion 117 {\circledR}. The introduction of pendent side-chain-type sulphonic acid groups increases the single-cell performance by more than approximately 20{\%}; thus, the lower water diffusivity, methanol permeability, electro-osmotic drag coefficient and high cell performance indicated that MS-SPEEK is a promising candidate for DMFC applications.",
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Preparation of main-chain-type and side-chain-type sulfonated poly(ether ether ketone) membranes for direct methanol fuel cell applications. / Tsai, Jie Cheng; Lin, Chien-Kung.

In: Journal of Power Sources, Vol. 196, No. 22, 15.11.2011, p. 9308-9316.

Research output: Contribution to journalArticle

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