A new proton conductive membrane - Tungsten peroxo complex doped sol-gel organic/inorganic nanocomposite polymer

Hitoshi Nakajima; Itaru Honma

A new proton conductive membrane - Tungsten peroxo complex doped sol-gel organic/inorganic nanocomposite polymer

Hitoshi Nakajima, Itaru Honma

IMRAM - Center for Mineral Processing and Metallurgy (CMPM)

National Institute of Advanced Industrial Science and Technology

Research output: Contribution to conference › Paper › peer-review

Abstract

New family of proton conducting organic/inorganic hybrid polymer electrolyte membrane was prepared by sol-gel processes. The method involves the stabilization of metastable acidic tungsten oxide cluster in the polymer composite membrane. A free-standing, flexible and pale-yellowish transparent homogeneous membrane was formed from tungsten acidic homogeneous solution by sol-gel condensation with alkoxysilylated polyethylene oxide. The membrane showed very high protonic conductivity of 10^-2-10^-3 S cm^-1 from R. T. to 120°C, especially, 1.4 × 10^-2 S cm^-1 at 80°C under 100% R. H. The structure of tungsten cluster moieties was neither peroxo complex nor WO₃.2H₂O, shown by infrared red and powder X-ray spectra. It is suggested that nanosize clusters are dispersed homogeneously in polymer matrix without long-range ordering. Tungsten complexes with carboxylate ligands such as malonic acid could form similar homogeneous membrane. Thermal and ionic transport properties could be controlled by these families of organic derivatives.

Original language	English
Pages	388-399
Number of pages	12
Publication status	Published - 2005
Event	Proton Conducting Membrane Fuel Cells III - Proceedings of the International Symposium - Salt Lake City, UT, United States Duration: 2002 Oct 21 → 2002 Oct 23

Conference

Conference	Proton Conducting Membrane Fuel Cells III - Proceedings of the International Symposium
Country/Territory	United States
City	Salt Lake City, UT
Period	02/10/21 → 02/10/23

Cite this

@conference{15be6250e2a94d8e963c42bb6dcfc982,

title = "A new proton conductive membrane - Tungsten peroxo complex doped sol-gel organic/inorganic nanocomposite polymer",

abstract = "New family of proton conducting organic/inorganic hybrid polymer electrolyte membrane was prepared by sol-gel processes. The method involves the stabilization of metastable acidic tungsten oxide cluster in the polymer composite membrane. A free-standing, flexible and pale-yellowish transparent homogeneous membrane was formed from tungsten acidic homogeneous solution by sol-gel condensation with alkoxysilylated polyethylene oxide. The membrane showed very high protonic conductivity of 10-2-10-3 S cm-1 from R. T. to 120°C, especially, 1.4 × 10-2 S cm-1 at 80°C under 100% R. H. The structure of tungsten cluster moieties was neither peroxo complex nor WO3.2H2O, shown by infrared red and powder X-ray spectra. It is suggested that nanosize clusters are dispersed homogeneously in polymer matrix without long-range ordering. Tungsten complexes with carboxylate ligands such as malonic acid could form similar homogeneous membrane. Thermal and ionic transport properties could be controlled by these families of organic derivatives.",

author = "Hitoshi Nakajima and Itaru Honma",

year = "2005",

language = "English",

pages = "388--399",

note = "Proton Conducting Membrane Fuel Cells III - Proceedings of the International Symposium ; Conference date: 21-10-2002 Through 23-10-2002",

}

A new proton conductive membrane - Tungsten peroxo complex doped sol-gel organic/inorganic nanocomposite polymer. / Nakajima, Hitoshi; Honma, Itaru.
2005. 388-399 Paper presented at Proton Conducting Membrane Fuel Cells III - Proceedings of the International Symposium, Salt Lake City, UT, United States.

Research output: Contribution to conference › Paper › peer-review

TY - CONF

T1 - A new proton conductive membrane - Tungsten peroxo complex doped sol-gel organic/inorganic nanocomposite polymer

AU - Nakajima, Hitoshi

AU - Honma, Itaru

PY - 2005

Y1 - 2005

N2 - New family of proton conducting organic/inorganic hybrid polymer electrolyte membrane was prepared by sol-gel processes. The method involves the stabilization of metastable acidic tungsten oxide cluster in the polymer composite membrane. A free-standing, flexible and pale-yellowish transparent homogeneous membrane was formed from tungsten acidic homogeneous solution by sol-gel condensation with alkoxysilylated polyethylene oxide. The membrane showed very high protonic conductivity of 10-2-10-3 S cm-1 from R. T. to 120°C, especially, 1.4 × 10-2 S cm-1 at 80°C under 100% R. H. The structure of tungsten cluster moieties was neither peroxo complex nor WO3.2H2O, shown by infrared red and powder X-ray spectra. It is suggested that nanosize clusters are dispersed homogeneously in polymer matrix without long-range ordering. Tungsten complexes with carboxylate ligands such as malonic acid could form similar homogeneous membrane. Thermal and ionic transport properties could be controlled by these families of organic derivatives.

AB - New family of proton conducting organic/inorganic hybrid polymer electrolyte membrane was prepared by sol-gel processes. The method involves the stabilization of metastable acidic tungsten oxide cluster in the polymer composite membrane. A free-standing, flexible and pale-yellowish transparent homogeneous membrane was formed from tungsten acidic homogeneous solution by sol-gel condensation with alkoxysilylated polyethylene oxide. The membrane showed very high protonic conductivity of 10-2-10-3 S cm-1 from R. T. to 120°C, especially, 1.4 × 10-2 S cm-1 at 80°C under 100% R. H. The structure of tungsten cluster moieties was neither peroxo complex nor WO3.2H2O, shown by infrared red and powder X-ray spectra. It is suggested that nanosize clusters are dispersed homogeneously in polymer matrix without long-range ordering. Tungsten complexes with carboxylate ligands such as malonic acid could form similar homogeneous membrane. Thermal and ionic transport properties could be controlled by these families of organic derivatives.

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M3 - Paper

AN - SCOPUS:28544449788

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T2 - Proton Conducting Membrane Fuel Cells III - Proceedings of the International Symposium

Y2 - 21 October 2002 through 23 October 2002

ER -

A new proton conductive membrane - Tungsten peroxo complex doped sol-gel organic/inorganic nanocomposite polymer

Abstract

Conference

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