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Structure and Transport Properties of Polymer Electrolyte Membranes Probed at Microscopic Scales

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Alternative Energies

Part of the book series: Advanced Structured Materials ((STRUCTMAT,volume 34))

Abstract

The synthesis and manufacturing of polymer electrolyte membranes with improved functional properties such as high proton conductivity and chemical stability is an actual challenge to increase the performances of Proton Exchange Membrane Fuel Cells. To achieve this goal, a microscopic understanding of the relation between the primary chemical nature of the electrolyte, the morphology, the proton transfer and water diffusion mechanisms, and the effective properties is essential. Multi-scale experimental strategies need to be developed for studying the structure/transport interplay in these complex charged polymers. In this chapter we focus on complementary spectroscopic techniques that operate at molecular, nanoscopic or mesoscopic scales. Both structural and dynamical characterizations of two representative polymer electrolytes are detailed: the benchmark perfluorinated Nafion membrane and an alternative polyaromatic material, the Sulfonated Polyimide. A review of state-of-the art numerical simulations is also provided to complement the experimental findings. The first section is dedicated to small angle scattering studies of polymer microstructure. The second section is devoted to the water and proton dynamics studied by quasi-elastic neutron scattering and NMR relaxometry. Finally the last section is dedicated to model self-assembled surfactant systems where the effect of confinement on proton mobility is explored in a systematic way.

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  1. Structure et Propriétés d’Architectures Moléculaires, UMR 5819 (CEA-CNRS-UJF), Laboratoire des Polymères Conducteurs Ioniques, INAC/SPrAM, CEA-Grenoble, 38054, Grenoble Cedex 9, France

    Sandrine Lyonnard

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  1. Sandrine Lyonnard
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  1. Circe / Centre of Research for Energy Resources and Consumption, Zaragoza, Spain

    Germán Ferreira

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Lyonnard, S. (2013). Structure and Transport Properties of Polymer Electrolyte Membranes Probed at Microscopic Scales. In: Ferreira, G. (eds) Alternative Energies. Advanced Structured Materials, vol 34. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40680-5_8

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