Alkyl chain modified sulfonated poly(ether sulfone) for fuel cell applications

N. Nambi Krishnan; Dirk Henkensmeier; Jong Hyun Jang; Hyoung Juhn Kim; Heung Yong Ha; Suk Woo Nam

doi:10.1016/j.ijhydene.2012.12.008

Alkyl chain modified sulfonated poly(ether sulfone) for fuel cell applications

N. Nambi Krishnan, Dirk Henkensmeier, Jong Hyun Jang, Hyoung Juhn Kim, Heung Yong Ha, Suk Woo Nam

GREEN SCHOOL (Graduate School of Energy and Environment)

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

6 Citations (Scopus)

Abstract

A new alkyl chain modified sulfonated poly(ether sulfone) (mPES) was synthesized and formed into membranes. The MEAs were tested in the PEMFC and evaluated systematically in the DMFC by varying the methanol concentration from 0.5 to 5.0 M at 60 °C and 70 °C. The synthesized mPES copolymer has been characterized by nuclear magnetic resonance spectroscopy, fourier transform infrared spectroscopy, thermogravimetric analysis, and gel permeation chromatography. The proton conductivity of the resulting membrane is higher than the threshold value of 10^-2 S cm^-1 at room temperature for practical PEM fuel cells. The membrane is insoluble in boiling water, thermally stable until 250 °C and shows low methanol permeability. In the H₂/air PEMFC at 70 °C, a current density of 600 mA cm ^-2 leads to a potential of 637 mV and 658 mV for 50 μm thick mPES 60 and Nafion NRE 212, respectively. In the DMFC, mPES 60's methanol crossover current density is 4 times lower than that for Nafion NRE 212, leading to higher OCV values and peak power densities. Among all investigated conditions and materials, the highest peak power density of 120 mW cm^-2 was obtained with an mPES 60 based MEA at 70 °C and a methanol feed of 2 M.

Original language	English
Pages (from-to)	2889-2899
Number of pages	11
Journal	International Journal of Hydrogen Energy
Volume	38
Issue number	6
DOIs	https://doi.org/10.1016/j.ijhydene.2012.12.008
Publication status	Published - 2013 Feb 27

Keywords

Alkyl chain modification
Direct methanol fuel cell
Fuel cell membrane
Poly(ether sulfone)
Proton exchange membrane fuel cell

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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10.1016/j.ijhydene.2012.12.008

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title = "Alkyl chain modified sulfonated poly(ether sulfone) for fuel cell applications",

abstract = "A new alkyl chain modified sulfonated poly(ether sulfone) (mPES) was synthesized and formed into membranes. The MEAs were tested in the PEMFC and evaluated systematically in the DMFC by varying the methanol concentration from 0.5 to 5.0 M at 60 °C and 70 °C. The synthesized mPES copolymer has been characterized by nuclear magnetic resonance spectroscopy, fourier transform infrared spectroscopy, thermogravimetric analysis, and gel permeation chromatography. The proton conductivity of the resulting membrane is higher than the threshold value of 10-2 S cm-1 at room temperature for practical PEM fuel cells. The membrane is insoluble in boiling water, thermally stable until 250 °C and shows low methanol permeability. In the H2/air PEMFC at 70 °C, a current density of 600 mA cm -2 leads to a potential of 637 mV and 658 mV for 50 μm thick mPES 60 and Nafion NRE 212, respectively. In the DMFC, mPES 60's methanol crossover current density is 4 times lower than that for Nafion NRE 212, leading to higher OCV values and peak power densities. Among all investigated conditions and materials, the highest peak power density of 120 mW cm-2 was obtained with an mPES 60 based MEA at 70 °C and a methanol feed of 2 M.",

keywords = "Alkyl chain modification, Direct methanol fuel cell, Fuel cell membrane, Poly(ether sulfone), Proton exchange membrane fuel cell",

author = "Krishnan, {N. Nambi} and Dirk Henkensmeier and Jang, {Jong Hyun} and Kim, {Hyoung Juhn} and Ha, {Heung Yong} and Nam, {Suk Woo}",

note = "Funding Information: This work was supported by KIST's e-bank program and the Joint Research Project funded by the Korea Research Council of Fundamental Science & Technology (KRCF) , Republic of Korea (seed-10-2). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

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day = "27",

doi = "10.1016/j.ijhydene.2012.12.008",

language = "English",

volume = "38",

pages = "2889--2899",

journal = "International Journal of Hydrogen Energy",

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T1 - Alkyl chain modified sulfonated poly(ether sulfone) for fuel cell applications

AU - Krishnan, N. Nambi

AU - Henkensmeier, Dirk

AU - Jang, Jong Hyun

AU - Kim, Hyoung Juhn

AU - Ha, Heung Yong

AU - Nam, Suk Woo

N1 - Funding Information: This work was supported by KIST's e-bank program and the Joint Research Project funded by the Korea Research Council of Fundamental Science & Technology (KRCF) , Republic of Korea (seed-10-2). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013/2/27

Y1 - 2013/2/27

N2 - A new alkyl chain modified sulfonated poly(ether sulfone) (mPES) was synthesized and formed into membranes. The MEAs were tested in the PEMFC and evaluated systematically in the DMFC by varying the methanol concentration from 0.5 to 5.0 M at 60 °C and 70 °C. The synthesized mPES copolymer has been characterized by nuclear magnetic resonance spectroscopy, fourier transform infrared spectroscopy, thermogravimetric analysis, and gel permeation chromatography. The proton conductivity of the resulting membrane is higher than the threshold value of 10-2 S cm-1 at room temperature for practical PEM fuel cells. The membrane is insoluble in boiling water, thermally stable until 250 °C and shows low methanol permeability. In the H2/air PEMFC at 70 °C, a current density of 600 mA cm -2 leads to a potential of 637 mV and 658 mV for 50 μm thick mPES 60 and Nafion NRE 212, respectively. In the DMFC, mPES 60's methanol crossover current density is 4 times lower than that for Nafion NRE 212, leading to higher OCV values and peak power densities. Among all investigated conditions and materials, the highest peak power density of 120 mW cm-2 was obtained with an mPES 60 based MEA at 70 °C and a methanol feed of 2 M.

AB - A new alkyl chain modified sulfonated poly(ether sulfone) (mPES) was synthesized and formed into membranes. The MEAs were tested in the PEMFC and evaluated systematically in the DMFC by varying the methanol concentration from 0.5 to 5.0 M at 60 °C and 70 °C. The synthesized mPES copolymer has been characterized by nuclear magnetic resonance spectroscopy, fourier transform infrared spectroscopy, thermogravimetric analysis, and gel permeation chromatography. The proton conductivity of the resulting membrane is higher than the threshold value of 10-2 S cm-1 at room temperature for practical PEM fuel cells. The membrane is insoluble in boiling water, thermally stable until 250 °C and shows low methanol permeability. In the H2/air PEMFC at 70 °C, a current density of 600 mA cm -2 leads to a potential of 637 mV and 658 mV for 50 μm thick mPES 60 and Nafion NRE 212, respectively. In the DMFC, mPES 60's methanol crossover current density is 4 times lower than that for Nafion NRE 212, leading to higher OCV values and peak power densities. Among all investigated conditions and materials, the highest peak power density of 120 mW cm-2 was obtained with an mPES 60 based MEA at 70 °C and a methanol feed of 2 M.

KW - Alkyl chain modification

KW - Direct methanol fuel cell

KW - Fuel cell membrane

KW - Poly(ether sulfone)

KW - Proton exchange membrane fuel cell

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

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IS - 6

ER -

Alkyl chain modified sulfonated poly(ether sulfone) for fuel cell applications

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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