Diffusion in polymer electrolytes and the dynamic percolation model

Dürr, Oliver; Dieterich, W.; Nitzan, Abraham

doi:10.1016/s0167-2738(02)00144-3

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…44 by increasing the polymer mass. It would be worthwhile to study dynamical percolation 57,58 to see how D DPD (at xed f w ) and percolation thresholds for the W beads are affected by reducing the polymer mobility. This can be realized by increase of polymer bead masses, increasing polymer lengths, and/or forbidding bond crossings.…”

Section: Discussionmentioning

confidence: 99%

Water diffusion within hydrated model grafted polymeric membranes with bimodal side chain length distributions

Dorenbos¹

2015

Soft Matter

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The effect of bimodal side chain length distributions on pore morphology and solvent diffusion within hydrated amphiphilic polymeric membranes is predicted. Seven polymeric architectures are constructed from hydrophobic backbones from which at regular intervals side chains branch off that are alternatingly short (composed of p hydrophobic A fragments or beads) and long (q A fragments, q > p). The side chains are end-linked with a hydrophilic C fragment. Pore morphologies at a water volume fraction of 0.16 are calculated by dissipative particle dynamics (DPD). Water diffusion through the water containing pores is calculated by tracer diffusion calculations through 140 selected snapshots and from the water bead motions. Diffusion constants decrease with difference in side chain lengths, q - p. Overall, the distance between pores also decreases with q - p. The results are explained by counting for every architecture the average number of bonds 〈N(bond)〉 between an A and the nearest C fragment. These results are in line with a database that contains more than 60 architectures. Diffusion constants tend to increase linearly with 〈N(bond)〉|C|(-1)|A|, where |C| and |A| are the C and A bead fractions within the architecture. 〈N(bond)〉 is therefore expected to be an interesting design parameter for obtaining low percolation thresholds for solvent and/or proton diffusion.

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Section: Discussionmentioning

confidence: 99%

Water diffusion within hydrated model grafted polymeric membranes with bimodal side chain length distributions

Dorenbos¹

2015

Soft Matter

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“…In contrast to ionic crystals, there is only little information about the number of sites that are available to the mobile ions and about the potential energy of the ions on these sites. Therefore, a variety of different theoretical approaches have been put forward using different assumptions about ion−network and ion−ion interactions. − …”

Section: Introductionmentioning

confidence: 99%

Ionic Transport in Glassy Networks with High Electronic Polarizabilities: Conductivity Spectroscopic Results Indicating a Vacancy-Type Transport Mechanism

and

Roling

2004

J. Phys. Chem. B

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We have carried out ac conductivity measurements on different alkali tellurite and silver halide containing glasses exhibiting high electronic polarizabilities. The analysis of the conductivity spectra provides strong evidence that the ionic site energy distributions in these glasses are distinct from those in conventional glasses with low electronic polarizabilities, such as silicate, borate, and phosphate glasses. Our results can be explained by postulating a vacancy-type transport mechanism, i.e., by assuming that a high electronic polarizabilty of the glassy network leads to a small and temperature-dependent ratio of empty ionic sites to mobile ions.

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Impact of shape (nanofiller vs. nanorod) of TiO₂ nanoparticle on free‐standing solid polymeric separator for energy storage/conversion devices

Arya

Saykar

Sharma

2018

J of Applied Polymer Sci

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We report the investigation on examining the impact of nanofiller (NF)‐ versus nanorod (NR)‐shaped titanium oxide (TiO2) nanoparticle on the structural, electrochemical, transport, thermal, and dielectric properties of the solid polymer electrolyte (SPE). Thin SPE films comprising of poly(ethylene oxide), sodium hexafluorophosphate, and dispersed with TiO2 NF, TiO2 NR (synthesized by hydrothermal route) has been prepared via solution cast technique. The shape of nanoparticle influences the morphological and structural properties as observed in field emission scanning electron microscope and X‐ray diffraction analysis. The highest ionic conductivity was exhibited by the NR dispersed system and is higher than NF dispersed system for all recorded concentration consistently. It is attributed to the formation of the long‐range conductive path with NR when compared with NF. In addition, the electrochemical stability window is much higher (~5 V) than the NF‐doped system. Furthermore, the dielectric properties of SPE were investigated and fitted in the complete frequency window (1 Hz–1 MHz; T = 40–100 °C @ 10 °C). It is observed that the NR dispersed system shows higher dielectric strength and low relaxation time with respect to NF dispersed system. The results suggest that the NR dispersed SPE possess enhanced properties and is more appropriate for an application in high energy density solid‐state Na ion batteries. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47361.

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Diffusion in polymer electrolytes and the dynamic percolation model

Cited by 6 publications

References 15 publications

Water diffusion within hydrated model grafted polymeric membranes with bimodal side chain length distributions

Water diffusion within hydrated model grafted polymeric membranes with bimodal side chain length distributions

Ionic Transport in Glassy Networks with High Electronic Polarizabilities: Conductivity Spectroscopic Results Indicating a Vacancy-Type Transport Mechanism

Impact of shape (nanofiller vs. nanorod) of TiO₂ nanoparticle on free‐standing solid polymeric separator for energy storage/conversion devices

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Diffusion in polymer electrolytes and the dynamic percolation model

Cited by 6 publications

References 15 publications

Water diffusion within hydrated model grafted polymeric membranes with bimodal side chain length distributions

Water diffusion within hydrated model grafted polymeric membranes with bimodal side chain length distributions

Ionic Transport in Glassy Networks with High Electronic Polarizabilities: Conductivity Spectroscopic Results Indicating a Vacancy-Type Transport Mechanism

Impact of shape (nanofiller vs. nanorod) of TiO2 nanoparticle on free‐standing solid polymeric separator for energy storage/conversion devices

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Impact of shape (nanofiller vs. nanorod) of TiO₂ nanoparticle on free‐standing solid polymeric separator for energy storage/conversion devices