Ion Transport in Glassy Side-Group Liquid Crystalline Polymer Electrolytes

Imrie, Corrie T.; Ingram, Malcolm D.; McHattie, Gillian S.

doi:10.1002/(sici)1521-4095(199907)11:10<832::aid-adma832>3.0.co;2-z

Cited by 64 publications

(46 citation statements)

References 13 publications

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“…No macroscopic uniform orientation of anisotropic nanostructures was observed for ion‐conductive LC materials made from polymers 9, 10, 31. In these cases, the ionic conductivities were lower than expected, and no anisotropic conductivity was observed.…”

Section: Resultsmentioning

confidence: 78%

“…For further functionalization of ion‐conductive polymers, the introduction of ordered nanostructures that provide anisotropic conductivities in low dimensions is of interest. Self‐organization processes of liquid crystals can be used to obtain such anisotropic materials 4–20. Recently, we have reported5 on the first example of an anisotropic ion‐conductive film that has layered nanostructures.…”

Section: Introductionmentioning

confidence: 99%

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Water in different poly(styrene sulfonic acid)‐grafted fluoropolymers

Walsby

Hietala

Maunu

et al. 2002

J of Applied Polymer Sci

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ABSTRACT:We investigated the water present in a series of radiation-grafted fluoropolymers with similar poly(styrene sulfonic acid) (PSSA) contents with the aim of determining the influence of the initial fluoropolymer. Radiationgrafted membranes were compared with Nafion 117 and 105. Sorption curves and differential scanning calorimetry thermograms showed that all the membranes contained the same number of water molecules tightly bound to the sulfonic acid groups; this water did not freeze. In radiationgrafted membranes, the content of freezing water absorbed from the liquid-phase water varied according to the swelling abilities of the membrane, which were dependent on the initial fluoropolymer. Larger pores accompanied high water uptakes and high conductivity. The amount of water absorbed from the vapor phase was similar for all radiationgrafted membranes with similar PSSA contents, irrespective of matrix material. Nafion membranes had higher conductivities at intermediate hydration levels, and the relaxation times measured by NMR were longer than for the radiationgrafted materials. This suggests that the channels for water and proton conduction are different in the two types of materials.

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Section: Resultsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Water in different poly(styrene sulfonic acid)‐grafted fluoropolymers

Walsby

Hietala

Maunu

et al. 2002

J of Applied Polymer Sci

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“…11,[26][27][28][29][30][31] Low-dimensional conductors due to self-organized or smectic lamellar structures have been constructed to suppress aggregation due † Helsinki University of Technology. ‡ to the charges [32][33][34][35][36][37][38][39][40] which can lead to anisotropic conductivity.…”

Section: Introductionmentioning

confidence: 99%

Mesomorphic Structure of Poly(styrene)-block-poly(4-vinylpyridine) with Oligo(ethylene oxide)sulfonic Acid Side Chains as a Model for Molecularly Reinforced Polymer Electrolyte

Kosonen¹,

Valkama²,

Hartikainen³

et al. 2002

Macromolecules

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Mesomorphic structure of poly(styrene)-block-poly(4-vinylpyridine) with oligo(ethylene oxide)sulfonic acid side chains as a model for molecularly reinforced polymer electrolyte Citation for published version (APA): Kosonen, H., Valkama, S., Hartikainen, J., Eerikainen, H., Torkkeli, M., Jokela, K., ... Eerikäinen, H. (2002). Mesomorphic structure of poly(styrene)-block-poly(4-vinylpyridine) with oligo(ethylene oxide)sulfonic acid side chains as a model for molecularly reinforced polymer electrolyte. Macromolecules, 35(27), ABSTRACT: We report self-organized polymer electrolytes based on poly(styrene)-block-poly(4-vinylpyridine) (PS-block-P4VP). Liquidlike ethylene oxide (EO) oligomers with sulfonic acid end groups are bonded to the P4VP block, leading to comb-shaped supramolecules with the PS-block-P4VP backbone. Lithium perchlorate (LiClO 4) has been added to the EO-rich domains. Small-and wide-angle X-ray scattering in combination with Fourier transformation infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), ac impedance, and dynamic mechanical spectroscopy (DMA) suggests alternating lamellae of reinforcing glassy PS domains and ionically conducting "nanochannels" consisting of poly(4-vinylpyridinium), oligomeric ethylene oxide sulfonates, and LiClO 4. The long period of the self-organization is ca. 300 Å. So far, the ionic conductivity levels remained relatively low, i.e., 10 -7 -10 -6 S/cm at room temperature and 10 -5 -10 -4 S/cm at 80°C. However, as self-organization of polymeric supramolecules allows combining glassy reinforcing domains and well-plasticized domains consisting of oligomers with high segmental motions, there may exist possibilities to tune feasible combination of electrical and mechanical properties.

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“…From an application point of view, hairy-rod electrolytes exhibit excellent mechanical properties, however, their ionic conductivities are generally still too low [12,53].…”

Section: 'Hairy-rod' Polymer Electrolytesmentioning

confidence: 99%

Mechanisms of Ion Transport in Amorphous and Nanostructured Materials

Roling

2006

Charge Transport in Disordered Solids With Applications in Electronics

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Ion Transport in Glassy Side-Group Liquid Crystalline Polymer Electrolytes

Cited by 64 publications

References 13 publications

Water in different poly(styrene sulfonic acid)‐grafted fluoropolymers

Water in different poly(styrene sulfonic acid)‐grafted fluoropolymers

Mesomorphic Structure of Poly(styrene)-block-poly(4-vinylpyridine) with Oligo(ethylene oxide)sulfonic Acid Side Chains as a Model for Molecularly Reinforced Polymer Electrolyte

Mechanisms of Ion Transport in Amorphous and Nanostructured Materials

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