Modification of a Nafion membrane by n-dodecyltrimethylammonium cation inclusion for potential application in DMFC

Yuso, Ma del Valle Martínez de; Cuberes, M. Teresa; Romero, V.; Neves, Luísa A.; Coelhoso, Isabel M.; Crespo, João G.; Rodríguez‐Castellón, Enrique; Benavente, J.

doi:10.1016/j.ijhydene.2013.05.046

Cited by 21 publications

(14 citation statements)

References 22 publications

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“…An instantaneous formation of white precipitation was observed. The white precipitation obtained by filtration and baked at 60 °C for 24 hours in an oven and then calcinated at 700 °C …”

Section: Methodsmentioning

confidence: 99%

“…Hence, many studies have been accompanied in designing appropriate membrane having all of these properties. The most widespread PEM is Nafion, which is a kind of perfluorinated sulfonic acid membranes . However, Nafion membrane has a high methanol permeability, which leads to poisoning of the Pt cathode catalyst via the formation of CO and consequently decreases the cell performance.…”

Section: Introductionmentioning

confidence: 99%

“…The most widespread PEM is Nafion, which is a kind of perfluorinated sulfonic acid membranes. 13,14 However, Nafion membrane has a high methanol permeability, which leads to poisoning of the Pt cathode catalyst via the formation of CO and consequently decreases the cell performance. Other challenges of Nafion are the decrease of proton conductivity in high temperature and high cost compared with similarly prepared membranes.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced properties of SPEEK with incorporating of PFSA and barium strontium titanate nanoparticles for application in DMFCs

et al. 2019

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Summary Novel blend nanocomposite proton‐exchange membranes were prepared using sulfonated poly (ether ether ketone) (SPEEK), perfluorosulfonic acid (PFSA), and Ba0.9Sr0.1TiO3 (BST) doped‐perovskite nanoparticles. The membranes were evaluated by attenuated total reflection, X‐ray diffraction spectroscopy, water uptake, proton conductivity, methanol permeability, and direct methanol fuel cell test. The effect of two additives, PFSA and BST, were investigated. Results indicated that both proton conductivity and methanol barrier of the blend nanocomposite membranes improved compared with pristine SPEEK and the as‐prepared blend membranes. The methanol permeability and the proton conductivity of the blend membrane containing 6 wt% BST obtained 3.56 × 10−7 cm2 s−1 (at 25 °C) and 0.110 S cm−1 (at 80 °C), respectively. The power density value for the optimum blend nanocomposite membrane (15 wt% PFSA and 6 wt% BST) (54.89 mW cm‐2) was higher than that of pristine SPEEK (31.34 mW cm‐2) and SPF15 blend membrane (36.12 mW cm‐2).

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“…An instantaneous formation of white precipitation was observed. The white precipitation obtained by filtration and baked at 60 °C for 24 hours in an oven and then calcinated at 700 °C …”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced properties of SPEEK with incorporating of PFSA and barium strontium titanate nanoparticles for application in DMFCs

et al. 2019

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“…A different approach is the modification of commonly used Nafion membranes by incorporating different cations through a proton exchange mechanism between the membrane and the ionic liquids. Martínez de Yuso [83] studied the effect of the incorporation of n-dodecyltrimethylammonium (DTA + ) in protonated Nafion 112 membranes. An equilibrium value of 68% for the DTA + incorporation was obtained after 22 h of contact between the membrane and the IL solution.…”

Section: Polymer-ionic Liquid Membranesmentioning

confidence: 99%

Progress in the use of ionic liquids as electrolyte membranes in fuel cells

Díaz

Ortiz

Ortíz

2014

Journal of Membrane Science

256

131

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This work provides a critical review of the progress in the use of Room Temperature Ionic Liquids (RTILs) as Proton Exchange Membrane (PEM) electrolytes in Fuel Cells (FCs). It is well-known that for an efficient early commercialisation of this technology it is necessary to develop a proton exchange membrane with high proton conductivity without water dependency capable of working at temperatures above 100 ºC. The use of ionic liquids as electrolytes in electrochemical devices is an emerging field due to their high conductivity, as well as their thermal, chemical and electrochemical stability under anhydrous conditions. This paper attempts to give a general overview of the state-of-the-art, identifies the key factors for future research and summarises the recent progress in the use of ionic liquids as an innovative type of PEMs.

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“…Another significant point is the shift to lower frequency value (~400 Hz) of the maximum relaxation frequency obtained for the Nafion112/TMPA + membrane with respect to both Nafion-112 and Nafion112/BMIM + membranes, which use to be associated to more compact membrane structure [18]. Due to the very similar molar volume of both cations, differences in electrical behaviour could be associated with the different shapes of both cations, sphere-like for TMPA + and lineal for BMIM + (see Scheme 1), which might facilitate the inclusion of the latter into the pinholes observed in the structure of the Nafion-112 membrane [25,26], but causing partial blockage when quasi-spherical TMPA + cation is used for membrane doping. In this context, it should also be mentioned the significant reduction (around two orders of magnitude) in methanol cross-over reported for both Nafion112/TMPA + and Nafion112/BMIM + membranes when compared with the original Nafion-112 sample [11], which can be of great interest for membranes' application in direct methanol fuel cells.…”

Section: Electrical Characterization Of Nafion112/il-cations Doped Mementioning

confidence: 99%

Chemical Surface, Thermal and Electrical Characterization of Nafion Membranes Doped with IL-Cations

et al. 2014

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Surface and bulk changes in a Nafion membrane as a result of IL-cation doping (1-butyl-3-methylimidazolium tetrafluoroborate or BMIM + BF 4 and phenyltrimethylammonium chloride or TMPA + Cl − ) were studied by X-ray photoelectron spectroscopy (XPS), contact angle, differential scanning calorimetry (DSC) and impedance spectroscopy (IS) measurements performed with dry samples after 24 h in contact with the IL-cations BMIM + and TMPA + . IL-cations were selected due to their similar molecular weight and molar volume but different shape, which could facilitate/obstruct the cation incorporation in the Nafion membrane structure by proton/cation exchange mechanism. The surface coverage of the Nafion membrane by the IL-cations was confirmed by XPS analysis and contact angle, while the results obtained by the other two techniques (DSC and IS) seem to indicate differences in thermal and electrical behaviour depending on the doping-cation, being less resistive the Nafion/BMIM + membrane. For that reason, determination of the ion transport number was obtained for this membrane by measuring the membrane or concentration potential with the samples in contact with HCl solutions at different concentrations. The comparison of these results with those obtained for the original Nafion membrane provides information on the effect of IL-cation BMIM + on the transport of H + across wet Nafion/BMIM + doped membranes. OPEN ACCESSAppl. Sci. 2014, 4 196

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Modification of a Nafion membrane by n-dodecyltrimethylammonium cation inclusion for potential application in DMFC

Cited by 21 publications

References 22 publications

Enhanced properties of SPEEK with incorporating of PFSA and barium strontium titanate nanoparticles for application in DMFCs

Enhanced properties of SPEEK with incorporating of PFSA and barium strontium titanate nanoparticles for application in DMFCs

Progress in the use of ionic liquids as electrolyte membranes in fuel cells

Chemical Surface, Thermal and Electrical Characterization of Nafion Membranes Doped with IL-Cations

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