Low methanol-permeable polyaniline/Nafion composite membrane for direct methanol fuel cells

C. H. Wang, C. C. Chen, H. C. Hsu, H. Y. Du, C. P. Chen, J. Y. Hwang, L. C. Chen, H. C. Shih, J. Stejskal, K. H. Chen

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Protonated polyaniline (PANI) is directly polymerized on Nafion 117 (N117), forming a composite membrane, to act as a methanol-blocking layer to reduce the methanol crossover in the direct methanol fuel cell (DMFC), which is beneficial for the DMFC operating at high methanol concentration. The PANI layer grown on the N117 with a thickness of 100 nm has an electrical conductivity of 13.2 S cm-1. The methanol permeability of the PANI/N117 membrane is reduced to 59% of that of the N117 alone, suggesting that the PANI/N117 can effectively reduce the methanol crossover in the DMFC. Comparison of membrane-electrode-assemblies (MEA) using the conventional N117 and the newly developed PANI/N117 composite shows that the PANI/N117-based MEA outputs higher power at high methanol concentration, while the output power of the N117-based MEA is reduced at high methanol concentration due to the methanol crossover. The maximum power density of the PANI/N117-based MEA at 60 °C is 70 mW cm-2 at 6 M methanol solution, which is double the N117-based MEA at the same methanol concentration. The resistance of PANI/N117 composite membrane is reduced at elevated methanol concentration, due to the hydrogen bonding between methanol and PANI pushes the polymer chains apart. It is concluded that the PANI/N117-based MEA performs well at elevated methanol concentration, which is suitable for the long-term operation of the DMFC.

Original languageEnglish
Pages (from-to)279-284
Number of pages6
JournalJournal of Power Sources
Volume190
Issue number2
DOIs
Publication statusPublished - 2009 May 15

Fingerprint

Direct methanol fuel cells (DMFC)
Composite membranes
Polyaniline
fuel cells
Methanol
methyl alcohol
membranes
composite materials
Membranes
assemblies
Electrodes
electrodes
crossovers
perfluorosulfonic acid
polyaniline
output
Hydrogen bonds
Polymers

Keywords

  • DMFC
  • Methanol crossover
  • Nafion
  • Polyaniline

ASJC Scopus subject areas

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

Cite this

Low methanol-permeable polyaniline/Nafion composite membrane for direct methanol fuel cells. / Wang, C. H.; Chen, C. C.; Hsu, H. C.; Du, H. Y.; Chen, C. P.; Hwang, J. Y.; Chen, L. C.; Shih, H. C.; Stejskal, J.; Chen, K. H.

In: Journal of Power Sources, Vol. 190, No. 2, 15.05.2009, p. 279-284.

Research output: Contribution to journalArticle

Wang, CH, Chen, CC, Hsu, HC, Du, HY, Chen, CP, Hwang, JY, Chen, LC, Shih, HC, Stejskal, J & Chen, KH 2009, 'Low methanol-permeable polyaniline/Nafion composite membrane for direct methanol fuel cells', Journal of Power Sources, vol. 190, no. 2, pp. 279-284. https://doi.org/10.1016/j.jpowsour.2008.12.125
Wang, C. H. ; Chen, C. C. ; Hsu, H. C. ; Du, H. Y. ; Chen, C. P. ; Hwang, J. Y. ; Chen, L. C. ; Shih, H. C. ; Stejskal, J. ; Chen, K. H. / Low methanol-permeable polyaniline/Nafion composite membrane for direct methanol fuel cells. In: Journal of Power Sources. 2009 ; Vol. 190, No. 2. pp. 279-284.
@article{68b0b839b470454097d3e946d3474974,
title = "Low methanol-permeable polyaniline/Nafion composite membrane for direct methanol fuel cells",
abstract = "Protonated polyaniline (PANI) is directly polymerized on Nafion 117 (N117), forming a composite membrane, to act as a methanol-blocking layer to reduce the methanol crossover in the direct methanol fuel cell (DMFC), which is beneficial for the DMFC operating at high methanol concentration. The PANI layer grown on the N117 with a thickness of 100 nm has an electrical conductivity of 13.2 S cm-1. The methanol permeability of the PANI/N117 membrane is reduced to 59{\%} of that of the N117 alone, suggesting that the PANI/N117 can effectively reduce the methanol crossover in the DMFC. Comparison of membrane-electrode-assemblies (MEA) using the conventional N117 and the newly developed PANI/N117 composite shows that the PANI/N117-based MEA outputs higher power at high methanol concentration, while the output power of the N117-based MEA is reduced at high methanol concentration due to the methanol crossover. The maximum power density of the PANI/N117-based MEA at 60 °C is 70 mW cm-2 at 6 M methanol solution, which is double the N117-based MEA at the same methanol concentration. The resistance of PANI/N117 composite membrane is reduced at elevated methanol concentration, due to the hydrogen bonding between methanol and PANI pushes the polymer chains apart. It is concluded that the PANI/N117-based MEA performs well at elevated methanol concentration, which is suitable for the long-term operation of the DMFC.",
keywords = "DMFC, Methanol crossover, Nafion, Polyaniline",
author = "Wang, {C. H.} and Chen, {C. C.} and Hsu, {H. C.} and Du, {H. Y.} and Chen, {C. P.} and Hwang, {J. Y.} and Chen, {L. C.} and Shih, {H. C.} and J. Stejskal and Chen, {K. H.}",
year = "2009",
month = "5",
day = "15",
doi = "10.1016/j.jpowsour.2008.12.125",
language = "English",
volume = "190",
pages = "279--284",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - Low methanol-permeable polyaniline/Nafion composite membrane for direct methanol fuel cells

AU - Wang, C. H.

AU - Chen, C. C.

AU - Hsu, H. C.

AU - Du, H. Y.

AU - Chen, C. P.

AU - Hwang, J. Y.

AU - Chen, L. C.

AU - Shih, H. C.

AU - Stejskal, J.

AU - Chen, K. H.

PY - 2009/5/15

Y1 - 2009/5/15

N2 - Protonated polyaniline (PANI) is directly polymerized on Nafion 117 (N117), forming a composite membrane, to act as a methanol-blocking layer to reduce the methanol crossover in the direct methanol fuel cell (DMFC), which is beneficial for the DMFC operating at high methanol concentration. The PANI layer grown on the N117 with a thickness of 100 nm has an electrical conductivity of 13.2 S cm-1. The methanol permeability of the PANI/N117 membrane is reduced to 59% of that of the N117 alone, suggesting that the PANI/N117 can effectively reduce the methanol crossover in the DMFC. Comparison of membrane-electrode-assemblies (MEA) using the conventional N117 and the newly developed PANI/N117 composite shows that the PANI/N117-based MEA outputs higher power at high methanol concentration, while the output power of the N117-based MEA is reduced at high methanol concentration due to the methanol crossover. The maximum power density of the PANI/N117-based MEA at 60 °C is 70 mW cm-2 at 6 M methanol solution, which is double the N117-based MEA at the same methanol concentration. The resistance of PANI/N117 composite membrane is reduced at elevated methanol concentration, due to the hydrogen bonding between methanol and PANI pushes the polymer chains apart. It is concluded that the PANI/N117-based MEA performs well at elevated methanol concentration, which is suitable for the long-term operation of the DMFC.

AB - Protonated polyaniline (PANI) is directly polymerized on Nafion 117 (N117), forming a composite membrane, to act as a methanol-blocking layer to reduce the methanol crossover in the direct methanol fuel cell (DMFC), which is beneficial for the DMFC operating at high methanol concentration. The PANI layer grown on the N117 with a thickness of 100 nm has an electrical conductivity of 13.2 S cm-1. The methanol permeability of the PANI/N117 membrane is reduced to 59% of that of the N117 alone, suggesting that the PANI/N117 can effectively reduce the methanol crossover in the DMFC. Comparison of membrane-electrode-assemblies (MEA) using the conventional N117 and the newly developed PANI/N117 composite shows that the PANI/N117-based MEA outputs higher power at high methanol concentration, while the output power of the N117-based MEA is reduced at high methanol concentration due to the methanol crossover. The maximum power density of the PANI/N117-based MEA at 60 °C is 70 mW cm-2 at 6 M methanol solution, which is double the N117-based MEA at the same methanol concentration. The resistance of PANI/N117 composite membrane is reduced at elevated methanol concentration, due to the hydrogen bonding between methanol and PANI pushes the polymer chains apart. It is concluded that the PANI/N117-based MEA performs well at elevated methanol concentration, which is suitable for the long-term operation of the DMFC.

KW - DMFC

KW - Methanol crossover

KW - Nafion

KW - Polyaniline

UR - http://www.scopus.com/inward/record.url?scp=65049087781&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=65049087781&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2008.12.125

DO - 10.1016/j.jpowsour.2008.12.125

M3 - Article

AN - SCOPUS:65049087781

VL - 190

SP - 279

EP - 284

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

IS - 2

ER -