An infrared study of the effects of hydration on cation-loaded nafion thin films

Blanchard, Renée M.; Nuzzo, Ralph G.

doi:10.1002/(sici)1099-0488(20000601)38:11<1512::aid-polb110>3.0.co;2-2

Cited by 39 publications

(103 citation statements)

References 30 publications

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“…Nafion membranes with EW 1100 g/mol, which is consistent with x ¼ 6-7 in Scheme 12.1a, have a long history of use in PEM fuel cell studies [3,5]. Discussions in this chapter focus on Nafion because of the central role it has played in the development of PEM fuel cells [1][2][3] and its use as a model in studies of membrane physicochemical properties [5,[9][10][11]. The general role of vibrational spectroscopy in the characterization of new PEM materials, however, should not be overlooked [6,[12][13][14].…”

Section: Overview Of Pem Materialsmentioning

confidence: 66%

“…ATR methods enable ionomer spectra to be recorded from membrane samples that have thicknesses >1 mm, including those that have more practical use in fuel cells where the thickness ranges from tens to hundreds of micrometers [2,5]. Furthermore, versatile ATR cells have been developed that allow rapid exchange of vapors with the membrane [10,16,18]. The sections below discuss the development of strategies for infrared transmission and ATR sampling of PEM materials.…”

Section: Experimental Approachesmentioning

confidence: 99%

“…Conventional ATR sampling techniques are frequently applied to obtain spectra of PEM materials [10,17,18,31]. Solutions of ionomer can be cast directly onto the ATR crystal to form an adherent film [10].…”

Section: Infrared Attenuated Total Reflectance (Atr) Samplingmentioning

confidence: 99%

“…Solutions of ionomer can be cast directly onto the ATR crystal to form an adherent film [10]. Alternatively, freestanding membrane can be pressed against the ATR crystal; however, care must be taken to ensure that the surfaces maintain contact and to avoid inducing stress in the membrane [16,17,18].…”

Section: Infrared Attenuated Total Reflectance (Atr) Samplingmentioning

confidence: 99%

“…Blanchard and Nuzzo demonstrated an ATR flow cell for investigating cast ionomer films [10]. A uniform film was deposited on one side of the ATR crystal by spin coating.…”

Section: Infrared Attenuated Total Reflectance (Atr) Samplingmentioning

confidence: 99%

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Vibrational Spectroscopy for the Characterization of PEM Fuel Cell Membrane Materials

Korzeniewski

2010

Fuel Cell Science

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Section: Overview Of Pem Materialsmentioning

confidence: 66%

Section: Experimental Approachesmentioning

confidence: 99%

Section: Infrared Attenuated Total Reflectance (Atr) Samplingmentioning

confidence: 99%

Section: Infrared Attenuated Total Reflectance (Atr) Samplingmentioning

confidence: 99%

“…Blanchard and Nuzzo demonstrated an ATR flow cell for investigating cast ionomer films [10]. A uniform film was deposited on one side of the ATR crystal by spin coating.…”

Section: Infrared Attenuated Total Reflectance (Atr) Samplingmentioning

confidence: 99%

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Vibrational Spectroscopy for the Characterization of PEM Fuel Cell Membrane Materials

Korzeniewski

2010

Fuel Cell Science

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Plasma‐Polymerised Proton Conductive Membranes for a Miniaturised PEMFC

Mahdjoub

Roualdès²,

Sistat

et al. 2005

Fuel Cells

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Thin films, containing fluorocarbons and sulphonic acid groups, were prepared by plasma polymerisation of 1,3‐butadiene/CF3SO3H and styrene/CF3SO3H mixtures using two different types of plasma discharges. The morphology, density, and chemical composition of the synthesised plasma polymers were examined by SEM, small‐angle X‐ray reflectometry, and FTIR and XPS analyses, respectively. Proton conductivity was measured with electrochemical impedance spectroscopy. The prepared films are relatively uniform and free from defects. Plasma materials exhibiting higher sulphonic acid group contents and lower densities are those formed, from the styrene/CF3SO3H mixture, in the after glow discharge configuration; which proves that the kind of discharge and the nature of the monomer mixture have a large influence on the microstructure of plasma materials. Consequently, plasma films, prepared in the after glow discharge from the styrene/CF3SO3H mixture, show proton conductivities (up to 9.8 × 10–2 mS cm–1) about one order of magnitude higher than films prepared in the glow discharge (up to 2.2 × 10–3 mS cm–1 and 2.5 × 10–3 mS cm–1 for films prepared from 1,3‐butadiene/CF3SO3H and styrene/CF3SO3H mixtures, respectively). When compared to the commercially available Nafion®, the reference electrolyte polymer in the PEMFC, our most competitive plasma polymers are intrinsically 100 times less conductive. Nevertheless, due to their thinness (about 1 μm), these plasma films show specific resistances (about 1.0 Ω cm2), which are lower than that of the Nafion® membrane (1.9 Ω cm2 specific resistance). This explains their potential significance as polymer electrolyte membranes in a miniaturised PEMFC.

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Preparation and Characterization of Conducting Systems based on EPDM/PE/PS‐co‐DVB/HSb

Linares¹,

Acosta²

2005

Macro Materials & Eng

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Summary: Blends of different compositions were prepared from: a thermoplastic elastomer (EPDM), a low density polyethylene (PE), a polystyrene crosslinked with a small amount of divinylbenzene (PS‐co‐DVB) and an inorganic proton conductor: antimonic acid (HSb). The blends obtained were sulfonated heterogeneously with chlorosulfonic acid and were then structurally and electrically characterized by means of the following techniques: differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), crystallization kinetics under non‐isothermal conditions and complex impedance spectroscopy.Dynamic mechanical analysis for EPDM and EP‐3 blends series.magnified imageDynamic mechanical analysis for EPDM and EP‐3 blends series.

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An infrared study of the effects of hydration on cation-loaded nafion thin films

Cited by 39 publications

References 30 publications

Vibrational Spectroscopy for the Characterization of PEM Fuel Cell Membrane Materials

Vibrational Spectroscopy for the Characterization of PEM Fuel Cell Membrane Materials

Plasma‐Polymerised Proton Conductive Membranes for a Miniaturised PEMFC

Preparation and Characterization of Conducting Systems based on EPDM/PE/PS‐co‐DVB/HSb

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