Nafion®/nitrated sulfonated poly(ether ether ketone) membranes for direct methanol fuel cells

Jie Cheng Tsai; Jen Feng Kuo; Chuh-Yung Chen

doi:10.1016/j.jpowsour.2009.04.067

Nafion^®/nitrated sulfonated poly(ether ether ketone) membranes for direct methanol fuel cells

Jie Cheng Tsai, Jen Feng Kuo, Chuh-Yung Chen

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Sulfonated poly(ether ether ketone)s (SPEEKs) are substituted on the main chain of the polymer by nitro groups and blended with Nafion^® to attain composite membranes. The sulfonation, nitration and blending are achieved with a simple, inexpensive process, and the blended membranes containing the nitrated SPEEKs reveal a liquid-liquid phase separation. The blended membranes have a lower water uptake compared to recast Nafion^®, and the methanol permeability is reduced significantly to 4.29 × 10^-7-5.34 × 10^-7 cm² s^-1 for various contents of nitrated SPEEK for S63N17, and 4.72 × 10^-7-7.11 × 10^-7 cm² s^-1 for S63N38, with a maximum proton conductivity of ∼0.085 S cm^-1. This study examines the single-cell performance at 80 °C of Nafion^®/nitrated SPEEK membranes with various contents of nitrated SPEEK and a degree of nitration of 23-25 mW cm^-2 for S63N17 and 24-29 mW cm^-2 for S63N38. Both the power density and open circuit voltage are higher than those of Nafion^® 115 and recast Nafion^®.

Original language	English
Pages (from-to)	226-233
Number of pages	8
Journal	Journal of Power Sources
Volume	194
Issue number	1
DOIs	https://doi.org/10.1016/j.jpowsour.2009.04.067
Publication status	Published - 2009 Oct 20

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2009.04.067

Cite this

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title = "Nafion{\textregistered}/nitrated sulfonated poly(ether ether ketone) membranes for direct methanol fuel cells",

abstract = "Sulfonated poly(ether ether ketone)s (SPEEKs) are substituted on the main chain of the polymer by nitro groups and blended with Nafion{\textregistered} to attain composite membranes. The sulfonation, nitration and blending are achieved with a simple, inexpensive process, and the blended membranes containing the nitrated SPEEKs reveal a liquid-liquid phase separation. The blended membranes have a lower water uptake compared to recast Nafion{\textregistered}, and the methanol permeability is reduced significantly to 4.29 × 10-7-5.34 × 10-7 cm2 s-1 for various contents of nitrated SPEEK for S63N17, and 4.72 × 10-7-7.11 × 10-7 cm2 s-1 for S63N38, with a maximum proton conductivity of ∼0.085 S cm-1. This study examines the single-cell performance at 80 °C of Nafion{\textregistered}/nitrated SPEEK membranes with various contents of nitrated SPEEK and a degree of nitration of 23-25 mW cm-2 for S63N17 and 24-29 mW cm-2 for S63N38. Both the power density and open circuit voltage are higher than those of Nafion{\textregistered} 115 and recast Nafion{\textregistered}.",

author = "Tsai, {Jie Cheng} and Kuo, {Jen Feng} and Chuh-Yung Chen",

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AU - Tsai, Jie Cheng

AU - Kuo, Jen Feng

AU - Chen, Chuh-Yung

PY - 2009/10/20

Y1 - 2009/10/20

N2 - Sulfonated poly(ether ether ketone)s (SPEEKs) are substituted on the main chain of the polymer by nitro groups and blended with Nafion® to attain composite membranes. The sulfonation, nitration and blending are achieved with a simple, inexpensive process, and the blended membranes containing the nitrated SPEEKs reveal a liquid-liquid phase separation. The blended membranes have a lower water uptake compared to recast Nafion®, and the methanol permeability is reduced significantly to 4.29 × 10-7-5.34 × 10-7 cm2 s-1 for various contents of nitrated SPEEK for S63N17, and 4.72 × 10-7-7.11 × 10-7 cm2 s-1 for S63N38, with a maximum proton conductivity of ∼0.085 S cm-1. This study examines the single-cell performance at 80 °C of Nafion®/nitrated SPEEK membranes with various contents of nitrated SPEEK and a degree of nitration of 23-25 mW cm-2 for S63N17 and 24-29 mW cm-2 for S63N38. Both the power density and open circuit voltage are higher than those of Nafion® 115 and recast Nafion®.

AB - Sulfonated poly(ether ether ketone)s (SPEEKs) are substituted on the main chain of the polymer by nitro groups and blended with Nafion® to attain composite membranes. The sulfonation, nitration and blending are achieved with a simple, inexpensive process, and the blended membranes containing the nitrated SPEEKs reveal a liquid-liquid phase separation. The blended membranes have a lower water uptake compared to recast Nafion®, and the methanol permeability is reduced significantly to 4.29 × 10-7-5.34 × 10-7 cm2 s-1 for various contents of nitrated SPEEK for S63N17, and 4.72 × 10-7-7.11 × 10-7 cm2 s-1 for S63N38, with a maximum proton conductivity of ∼0.085 S cm-1. This study examines the single-cell performance at 80 °C of Nafion®/nitrated SPEEK membranes with various contents of nitrated SPEEK and a degree of nitration of 23-25 mW cm-2 for S63N17 and 24-29 mW cm-2 for S63N38. Both the power density and open circuit voltage are higher than those of Nafion® 115 and recast Nafion®.

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