Cross-linked membranes based on sulfonated poly (ether ether ketone) (SPEEK)/Nafion for direct methanol fuel cells (DMFCs)

Na Zhang, Gang Zhang, Dan Xu, Chengji Zhao, Wenjia Ma, Hongtao Li, Yang Zhang, Shuai Xu, Hao Jiang, Hongcheng Sun, Hui Na

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

A series of cross-linked membranes based on SPEEK/Nafion have been prepared to improve methanol resistance and dimension stability of SPEEK membrane for the usage in the direct methanol fuel cells (DMFCs). Sulfonated diamine monomer is synthesized and used as cross-linker to improve the dispersion of Nafion in the composite membranes and decrease the negative effect of cross-linking on proton conductivity of membranes. FT-IR analysis shows that the cross-linking reaction is performed successfully. The effects of different contents of Nafion on the properties of cross-linked membranes are investigated in detail. All the cross-linked membranes show lower methanol permeability and better dimensional stability compared with the pristine SPEEK membrane. SPEEK-N30 with the 30 wt % Nafion shows a methanol permeability of 0.73 × 10-6 cm 2 s-1 and a water uptake of 24.4% at 25 °C, which are lower than those of the pristine membrane. Meanwhile, the proton conductivity of SPEEK-N30 still remains at 0.041 S cm-1 at 25 °C, which is comparable to that of the pristine SPEEK membrane. All the results indicate that these cross-linked membranes based on SPEEK/Nafion show good prospect for the use as proton exchange membranes.

Original languageEnglish (US)
Pages (from-to)11025-11033
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number17
DOIs
StatePublished - Aug 1 2011

Fingerprint

Polyether ether ketones
Direct methanol fuel cells (DMFC)
ketones
fuel cells
ethers
methyl alcohol
membranes
Membranes
Methanol
Proton conductivity
protons
permeability
Composite membranes
Dimensional stability
dimensional stability
conductivity
Ion exchange
Protons
Monomers
diamines

All Science Journal Classification (ASJC) codes

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

Cite this

Zhang, Na ; Zhang, Gang ; Xu, Dan ; Zhao, Chengji ; Ma, Wenjia ; Li, Hongtao ; Zhang, Yang ; Xu, Shuai ; Jiang, Hao ; Sun, Hongcheng ; Na, Hui. / Cross-linked membranes based on sulfonated poly (ether ether ketone) (SPEEK)/Nafion for direct methanol fuel cells (DMFCs). In: International Journal of Hydrogen Energy. 2011 ; Vol. 36, No. 17. pp. 11025-11033.
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abstract = "A series of cross-linked membranes based on SPEEK/Nafion have been prepared to improve methanol resistance and dimension stability of SPEEK membrane for the usage in the direct methanol fuel cells (DMFCs). Sulfonated diamine monomer is synthesized and used as cross-linker to improve the dispersion of Nafion in the composite membranes and decrease the negative effect of cross-linking on proton conductivity of membranes. FT-IR analysis shows that the cross-linking reaction is performed successfully. The effects of different contents of Nafion on the properties of cross-linked membranes are investigated in detail. All the cross-linked membranes show lower methanol permeability and better dimensional stability compared with the pristine SPEEK membrane. SPEEK-N30 with the 30 wt {\%} Nafion shows a methanol permeability of 0.73 × 10-6 cm 2 s-1 and a water uptake of 24.4{\%} at 25 °C, which are lower than those of the pristine membrane. Meanwhile, the proton conductivity of SPEEK-N30 still remains at 0.041 S cm-1 at 25 °C, which is comparable to that of the pristine SPEEK membrane. All the results indicate that these cross-linked membranes based on SPEEK/Nafion show good prospect for the use as proton exchange membranes.",
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Cross-linked membranes based on sulfonated poly (ether ether ketone) (SPEEK)/Nafion for direct methanol fuel cells (DMFCs). / Zhang, Na; Zhang, Gang; Xu, Dan; Zhao, Chengji; Ma, Wenjia; Li, Hongtao; Zhang, Yang; Xu, Shuai; Jiang, Hao; Sun, Hongcheng; Na, Hui.

In: International Journal of Hydrogen Energy, Vol. 36, No. 17, 01.08.2011, p. 11025-11033.

Research output: Contribution to journalArticle

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AU - Zhang, Na

AU - Zhang, Gang

AU - Xu, Dan

AU - Zhao, Chengji

AU - Ma, Wenjia

AU - Li, Hongtao

AU - Zhang, Yang

AU - Xu, Shuai

AU - Jiang, Hao

AU - Sun, Hongcheng

AU - Na, Hui

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N2 - A series of cross-linked membranes based on SPEEK/Nafion have been prepared to improve methanol resistance and dimension stability of SPEEK membrane for the usage in the direct methanol fuel cells (DMFCs). Sulfonated diamine monomer is synthesized and used as cross-linker to improve the dispersion of Nafion in the composite membranes and decrease the negative effect of cross-linking on proton conductivity of membranes. FT-IR analysis shows that the cross-linking reaction is performed successfully. The effects of different contents of Nafion on the properties of cross-linked membranes are investigated in detail. All the cross-linked membranes show lower methanol permeability and better dimensional stability compared with the pristine SPEEK membrane. SPEEK-N30 with the 30 wt % Nafion shows a methanol permeability of 0.73 × 10-6 cm 2 s-1 and a water uptake of 24.4% at 25 °C, which are lower than those of the pristine membrane. Meanwhile, the proton conductivity of SPEEK-N30 still remains at 0.041 S cm-1 at 25 °C, which is comparable to that of the pristine SPEEK membrane. All the results indicate that these cross-linked membranes based on SPEEK/Nafion show good prospect for the use as proton exchange membranes.

AB - A series of cross-linked membranes based on SPEEK/Nafion have been prepared to improve methanol resistance and dimension stability of SPEEK membrane for the usage in the direct methanol fuel cells (DMFCs). Sulfonated diamine monomer is synthesized and used as cross-linker to improve the dispersion of Nafion in the composite membranes and decrease the negative effect of cross-linking on proton conductivity of membranes. FT-IR analysis shows that the cross-linking reaction is performed successfully. The effects of different contents of Nafion on the properties of cross-linked membranes are investigated in detail. All the cross-linked membranes show lower methanol permeability and better dimensional stability compared with the pristine SPEEK membrane. SPEEK-N30 with the 30 wt % Nafion shows a methanol permeability of 0.73 × 10-6 cm 2 s-1 and a water uptake of 24.4% at 25 °C, which are lower than those of the pristine membrane. Meanwhile, the proton conductivity of SPEEK-N30 still remains at 0.041 S cm-1 at 25 °C, which is comparable to that of the pristine SPEEK membrane. All the results indicate that these cross-linked membranes based on SPEEK/Nafion show good prospect for the use as proton exchange membranes.

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