New membranes based on ionic liquids for PEM fuel cells at elevated temperatures

Ye, H.; Huang, Jian; Xu, Jun; Kodiweera, Chandana; Jayakody, J. R. P.; Greenbaum, Steve

doi:10.1016/j.jpowsour.2007.07.074

Cited by 157 publications

(96 citation statements)

References 54 publications

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“…The application of ILs as electrolytes in electrochemistry, 122 fuel cells, 123 electrochemical devices, 8 such as rechargeable Therefore it is important to understand the factors influencing the conductivity. Electrical conductivities, k, of [C n mim][TCM] were studied in the temperature range from 293.25 to 379.25 K at atmospheric pressure.…”

Section: Electrical Conductivitymentioning

confidence: 99%

Thermophysical properties of imidazolium tricyanomethanide ionic liquids: experiments and molecular simulation

Zubeir

Rocha

Vergadou

et al. 2016

Phys. Chem. Chem. Phys.

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The low-viscous tricyanomethanide ([TCM]À )-based ionic liquids (ILs) are gaining increasing interest as attractive fluids for a variety of industrial applications. The thermophysical properties (density, viscosity, surface tension, electrical conductivity and self-diffusion coefficient) of the 1-alkyl-3-methylimidazolium tricyanomethanide [C n mim][TCM] (n = 2, 4 and 6-8) IL series were experimentally measured over the temperature range from 288 to 363 K. Moreover, a classical force field optimized for the imidazolium-based[TCM] À ILs was used to calculate their thermodynamic, structural and transport properties (density, surface tension, self-diffusion coefficients, viscosity) in the temperature range from 300 to 366 K. The predictions were directly compared against the experimental measurements. The effects of anion and alkyl chain length on the structure and thermophysical properties have been evaluated. In cyano-based ILs, the density decreases with increasing molar mass, in contrast to the behavior of the fluorinated anions, being in agreement with the literature. The contribution per -CH 2 -group to the increase of the viscosity presents the following sequence: The experimentally determined self-diffusion coefficients of the cations are in good agreement with the molecular simulation predictions, in which a decrease of the self-diffusion of the cations with increasing alkyl chain length is observed with a simultaneous increase in viscosity and for the longer alkyl lengths the anion becomes more mobile than the cation.

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Section: Electrical Conductivitymentioning

confidence: 99%

Thermophysical properties of imidazolium tricyanomethanide ionic liquids: experiments and molecular simulation

Zubeir

Rocha

Vergadou

et al. 2016

Phys. Chem. Chem. Phys.

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“…Room temperature ionic liquids (RTILs) electrolytes have attracted considerable attention in electrochemical applications [45] and can be a good candidate for high-temperature PEMFCs [46][47][48] application due to its more thermally stable at a wide temperature range [49,50] and non-volatile dopant than other acid doping composite membranes. Based on cationic structures, the RTILs can be classified into one of seven families [51] and it is possible to design desired physicochemical properties of RTILs by the choice of the ionic constituents.…”

Section: Room Temperature Ionic Liquids Electrolytesmentioning

confidence: 99%

Recent Progress on the Key Materials and Components for Proton Exchange Membrane Fuel Cells in Vehicle Applications

Wang

Peng

et al. 2016

Energies

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Fuel cells are the most clean and efficient power source for vehicles. In particular, proton exchange membrane fuel cells (PEMFCs) are the most promising candidate for automobile applications due to their rapid start-up and low-temperature operation. Through extensive global research efforts in the latest decade, the performance of PEMFCs, including energy efficiency, volumetric and mass power density, and low temperature startup ability, have achieved significant breakthroughs. In 2014, fuel cell powered vehicles were introduced into the market by several prominent vehicle companies. However, the low durability and high cost of PEMFC systems are still the main obstacles for large-scale industrialization of this technology. The key materials and components used in PEMFCs greatly affect their durability and cost. In this review, the technical progress of key materials and components for PEMFCs has been summarized and critically discussed, including topics such as the membrane, catalyst layer, gas diffusion layer, and bipolar plate. The development of high-durability processing technologies is also introduced. Finally, this review is concluded with personal perspectives on the future research directions of this area.

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“…Water contents in the membranes favor their proton transport [16] and promise a wide range for the composites to operate as PEM at higher temperatures [9]. Although a high water content in the membrane is desirable, in the fuel cell can block reactant access to the catalyst layer, reducing the overall cell performance [17].…”

Section: Thermal Analysismentioning

confidence: 99%

Electrical Properties and Phase Behavior of Proton Conducting Nanocomposites Based on the Polymer System (1 － x)[PVOH + H3PO2 + H2O]·x(Nb2O5)

Mazuera¹,

Vargas²

2014

AJAC

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New membranes based on ionic liquids for PEM fuel cells at elevated temperatures

Cited by 157 publications

References 54 publications

Thermophysical properties of imidazolium tricyanomethanide ionic liquids: experiments and molecular simulation

Thermophysical properties of imidazolium tricyanomethanide ionic liquids: experiments and molecular simulation

Recent Progress on the Key Materials and Components for Proton Exchange Membrane Fuel Cells in Vehicle Applications

Electrical Properties and Phase Behavior of Proton Conducting Nanocomposites Based on the Polymer System (1 － x)[PVOH + H<sub>3</sub>PO<sub>2</sub> + H<sub>2</sub>O]·x(Nb<sub>2</sub>O<sub>5</sub>)

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New membranes based on ionic liquids for PEM fuel cells at elevated temperatures

Cited by 157 publications

References 54 publications

Thermophysical properties of imidazolium tricyanomethanide ionic liquids: experiments and molecular simulation

Thermophysical properties of imidazolium tricyanomethanide ionic liquids: experiments and molecular simulation

Recent Progress on the Key Materials and Components for Proton Exchange Membrane Fuel Cells in Vehicle Applications

Electrical Properties and Phase Behavior of Proton Conducting Nanocomposites Based on the Polymer System (1 － x)[PVOH + H&lt;sub&gt;3&lt;/sub&gt;PO&lt;sub&gt;2&lt;/sub&gt; + H&lt;sub&gt;2&lt;/sub&gt;O]&#183;x(Nb&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt;)

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Electrical Properties and Phase Behavior of Proton Conducting Nanocomposites Based on the Polymer System (1 － x)[PVOH + H<sub>3</sub>PO<sub>2</sub> + H<sub>2</sub>O]·x(Nb<sub>2</sub>O<sub>5</sub>)