A model of charge transport and electromechanical transduction in ionic liquid-swollen Nafion membranes

Bennett, Matthew D.; Leo, Donald J.; Wilkes, Garth L.; Beyer, Frederick L.; Pechar, Todd W.

doi:10.1016/j.polymer.2006.07.061

Cited by 115 publications

(137 citation statements)

References 41 publications

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“…8,9 Following the latter research strategy, it has been demonstrated that proton conductors are promising electrolytes in fuel cells and batteries. 10 Unfortunately, most of these systems are watersaturated materials characterized by relatively poor proton conductivity in anhydrous conditions that limits their commercial application. To date, there are only few examples of dry superprotonic glasses and polymers.…”

Section: Introductionmentioning

confidence: 99%

Molecular Origin of Enhanced Proton Conductivity in Anhydrous Ionic Systems

et al. 2015

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Ionic systems with enhanced proton conductivity are widely viewed as promising electrolytes in fuel cells and batteries. Nevertheless, a major challenge toward their commercial applications is determination of the factors controlling the fast proton hopping in anhydrous conditions. To address this issue, we have studied novel proton-conducting materials formed via a chemical reaction of lidocaine base with a series of acids characterized by a various number of proton-active sites. From ambient and high pressure experimental data, we have found that there are fundamental differences in the conducting properties of the examined salts.On the other hand, DFT calculations revealed that the internal proton hopping within the cation structure strongly affects the pathways of mobility of the charge carrier. These findings offer a 2 fresh look on the Grotthuss-type mechanism in protic ionic glasses as well as provide new ideas for the design of anhydrous materials with exceptionally high proton conductivity.

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Section: Introductionmentioning

confidence: 99%

Molecular Origin of Enhanced Proton Conductivity in Anhydrous Ionic Systems

et al. 2015

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“…The reported conductivities range from 10 − 4 to 10 − 3 S cm − 1 (refs 21-23). When Nafion, a current state-of-the-art PEM, is impregnated with different ILs, the reported anhydrous conductivity lies in the range of 0.001 − 0.1 S cm − 1 at 100 − 200 °C [24][25][26] . Note that the conductivities of Nafion/IL systems are significantly dependent on variables such as the sample preparation temperature and casting solvent [27][28][29] .…”

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confidence: 99%

Enhanced proton transport in nanostructured polymer electrolyte/ionic liquid membranes under water-free conditions

2010

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Proton exchange fuel cells (PEFCs) have the potential to provide power for a variety of applications ranging from electronic devices to transportation vehicles. A major challenge towards economically viable PEFCs is finding an electrolyte that is both durable and easily passes protons. In this article, we study novel anhydrous proton-conducting membranes, formed by incorporating ionic liquids into synthetic block co-polymer electrolytes, poly(styrenesulphonate-b-methylbutylene) (s n mB m ), as high-temperature PEFCs. The resulting membranes are transparent, flexible and thermally stable up to 180 °C. The increases in the sulphonation level of s n mB m co-polymers (proton supplier) and the concentration of the ionic liquid (proton mediator) produce an overall increase in conductivity. morphology effects were studied by X-ray scattering and electron microscopy. Compared with membranes having discrete ionic domains (including nafion 117), the nanostructured membranes revealed over an order of magnitude increase in conductivity with the highest conductivity of 0.045 s cm − 1 obtained at 165 °C.

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“…[72][73][74][75][76][77][78][79][80] Ionic liquids are salts containing organic cations and (mostly) inorganic anions. They exist in their liquid state at room temperature.…”

Section: Ionic Liquidsmentioning

confidence: 99%

Ionic electroactive polymer metal composites: Fabricating, modeling, and applications of postsilicon smart devices

Luca

Digiamberardino

Pasquale

et al. 2013

J Polym Sci B Polym Phys

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Smart systems adapt to the surrounding environments in a number of ways. They are capable to scavenge energy from available sources, sense and elaborate external stimuli and adequately react. Electro Active Polymers are playing a main role in the realization of smart systems for applications if fields such as bio inspired and autonomous robotics, medicine, and aerospace. This paper focus on the possibility to use Ionic Polymer Metal Composites as a class of materials relevant to the realization of post silicon smart systems. The three main aspects of this new technology, i.e., fabrication methods, modeling, and applications are described with emphasis to most recent results. Attention is given to main challenges and shortcomings to be solved for technology, modelling, and control of IPMC based devices that need to be solved before this new technology can be fully exploited in real world applications.

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A model of charge transport and electromechanical transduction in ionic liquid-swollen Nafion membranes

Cited by 115 publications

References 41 publications

Molecular Origin of Enhanced Proton Conductivity in Anhydrous Ionic Systems

Molecular Origin of Enhanced Proton Conductivity in Anhydrous Ionic Systems

Enhanced proton transport in nanostructured polymer electrolyte/ionic liquid membranes under water-free conditions

Ionic electroactive polymer metal composites: Fabricating, modeling, and applications of postsilicon smart devices

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