Modification of proton conductive polymer membranes with phosphonated polysilsesquioxanes

Sérgio H. Pezzin; Norbert Stock; Sergey Shishatskiy; Suzana P. Nunes

doi:10.1016/j.memsci.2008.08.010

Modification of proton conductive polymer membranes with phosphonated polysilsesquioxanes

Sérgio H. Pezzin, Norbert Stock, Sergey Shishatskiy, Suzana P. Nunes^*

^*Corresponding author for this work

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

28 Scopus citations

Abstract

New hybrid membranes for fuel cell applications based on sulfonated poly(ether ether ketone) (SPEEK) and phosphonated polysilsesquioxanes were synthesized. The impedance spectroscopy measurements show an increase of the proton conductivity for all studied composites, in comparison to plain SPEEK. For hybrid membranes containing 20 wt% of polysilsesquioxane with 80 mol% of phosphonated units the conductivities can reach values that are similar to Nafion 117^® at 100% RH. The best results of proton conductivity (142 mS/cm) were obtained for composites with 40 wt% of the same polysilsesquioxane at 120 °C also at 100% RH.

Original language	English (US)
Pages (from-to)	559-569
Number of pages	11
Journal	Journal of Membrane Science
Volume	325
Issue number	2
DOIs	https://doi.org/10.1016/j.memsci.2008.08.010
State	Published - Dec 1 2008
Externally published	Yes

Keywords

Fuel cells
Hybrid membrane
Polysilsesquioxanes
Proton conductivity
SPEEK

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2008.08.010

Cite this

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title = "Modification of proton conductive polymer membranes with phosphonated polysilsesquioxanes",

abstract = "New hybrid membranes for fuel cell applications based on sulfonated poly(ether ether ketone) (SPEEK) and phosphonated polysilsesquioxanes were synthesized. The impedance spectroscopy measurements show an increase of the proton conductivity for all studied composites, in comparison to plain SPEEK. For hybrid membranes containing 20 wt% of polysilsesquioxane with 80 mol% of phosphonated units the conductivities can reach values that are similar to Nafion 117{\textregistered} at 100% RH. The best results of proton conductivity (142 mS/cm) were obtained for composites with 40 wt% of the same polysilsesquioxane at 120 °C also at 100% RH.",

keywords = "Fuel cells, Hybrid membrane, Polysilsesquioxanes, Proton conductivity, SPEEK",

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T1 - Modification of proton conductive polymer membranes with phosphonated polysilsesquioxanes

AU - Pezzin, Sérgio H.

AU - Stock, Norbert

AU - Shishatskiy, Sergey

AU - Nunes, Suzana P.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - New hybrid membranes for fuel cell applications based on sulfonated poly(ether ether ketone) (SPEEK) and phosphonated polysilsesquioxanes were synthesized. The impedance spectroscopy measurements show an increase of the proton conductivity for all studied composites, in comparison to plain SPEEK. For hybrid membranes containing 20 wt% of polysilsesquioxane with 80 mol% of phosphonated units the conductivities can reach values that are similar to Nafion 117® at 100% RH. The best results of proton conductivity (142 mS/cm) were obtained for composites with 40 wt% of the same polysilsesquioxane at 120 °C also at 100% RH.

AB - New hybrid membranes for fuel cell applications based on sulfonated poly(ether ether ketone) (SPEEK) and phosphonated polysilsesquioxanes were synthesized. The impedance spectroscopy measurements show an increase of the proton conductivity for all studied composites, in comparison to plain SPEEK. For hybrid membranes containing 20 wt% of polysilsesquioxane with 80 mol% of phosphonated units the conductivities can reach values that are similar to Nafion 117® at 100% RH. The best results of proton conductivity (142 mS/cm) were obtained for composites with 40 wt% of the same polysilsesquioxane at 120 °C also at 100% RH.

KW - Fuel cells

KW - Hybrid membrane

KW - Polysilsesquioxanes

KW - Proton conductivity

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Modification of proton conductive polymer membranes with phosphonated polysilsesquioxanes

Abstract

Keywords

ASJC Scopus subject areas

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