Anionic membrane based on polyepichlorhydrin matrix for alkaline fuel cell: Synthesis, physical and electrochemical properties

Stoica, Daniela; Ogier, Lionel; Akrour, Laurent; Alloin, Fannie; Fauvarque, Jean‐François

doi:10.1016/j.electacta.2007.03.034

Cited by 159 publications

(111 citation statements)

References 17 publications

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“…At a temperature of 70°C, the highest ionic conductivity of 7.2 S m -1 was achieved in the case of the membrane with an addition of 6.8 wt% of the water-soluble component. This value is higher than the IC of many other heterogeneous [17,19,20] or homogeneous [18,21,22] anion-exchange membranes reported in the literature. A further increase in the PEG-PPG addition resulted in a decrease of the IC.…”

Section: Ionic Conductivitycontrasting

confidence: 40%

Polymer anion-selective membranes for electrolytic splitting of water. Part II: Enhancement of ionic conductivity and performance under conditions of alkaline water electrolysis

et al. 2012

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An attempt was made to increase the ionic conductivity of novel, heterogeneous, anion-selective membranes by increasing the porosity of their surface skin. This was based on the addition of a water-soluble component, namely poly(ethylene-ran-propylene glycol), to an inert polymer matrix, based on low-density polyethylene, while mixing it with the ion-exchange particles. A series of membranes was prepared, consisting of 66 wt% of anionexchange phase represented by a styrene-divinyl benzene copolymer matrix with quaternary ammonium functional groups and an inert polymer matrix in a mixture with variable amounts of water-soluble component added. The membranes were subsequently tested with respect to their morphology, mechanical properties, apparent ion-exchange capacity, ionic conductivity, and performance under conditions of alkaline water electrolysis. When added in the appropriate amount, the addition of a water-soluble component was found to improve the electrochemical properties of the resulting membrane efficiently, while at the same time not reducing its mechanical properties to below a critical level.

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Section: Ionic Conductivitycontrasting

confidence: 40%

Polymer anion-selective membranes for electrolytic splitting of water. Part II: Enhancement of ionic conductivity and performance under conditions of alkaline water electrolysis

et al. 2012

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“…Indeed, to date, chemical cross-linking was usually used to suppress the water swelling and thus improve the dimensional stability of membranes. Several groups have incorporated cross-linkable moieties in AEMs for example: N,N,N ,N -tetramethyl-1,6-hexanediamine (TMHDA), 42,43,44 dithiol 45 dialdehyde, 41 tetraalkoxysilanes, 46 and epoxy based cross-linkers. 47 Recently, progress in other cross-linking strategies has been reported.…”

mentioning

confidence: 99%

Characterization and Chemical Stability of Anion Exchange Membranes Cross-Linked with Polar Electron-Donating Linkers

Amel

Smedley

Dekel

et al. 2015

J. Electrochem. Soc.

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The effect of the cross-linker chemical structure on the properties and chemical stability of anion exchange membrane is the focus of this study. Two different cross-linkers were investigated, one with linear hexyl chain between crosslinking sites, and the other, ether in the center of the alkyl linker. These two cross-linkers have a fundamental difference in their polarity and hydrophilicity. The ether-containing cross-linker is more polar and therefore will improve membrane's water uptake and conductivity. Swelling and conductivity measurements were performed at various temperatures for both types of samples. While water uptake and conductivity were found to be higher for the ether-based cross-linker, degradation measurements indicated that the membrane that is cross-linked with electron-rich linker degraded in hydroxide faster than the alkyl linker at temperature of 60 • Fuel cell technology has been recognized as a promising clean energy conversion technology in next-generation energy systems. Fuel cells have been undergoing revolutionary developments in the last few decades. [1][2][3] Among the different types of fuel cell systems, proton exchange membrane fuel cells (PEMFC) are the most investigated and developed for low-temperature operation in portable and automotive environments. 4,5 Although there has been great progress in improving the performance and lifetime of PEMFCs and large-scale commercial applications are on the horizon, the largest barriers to wide-spread fuel cell technology are materials availability and cost. Among the limitations of PEMFCs, the dependence on noble metal catalysts is a critical concern. For example, the use of Nafion, the state of the art acidic membrane, generally allows only platinum group metals to be used as stable catalysts for long-term use, thus considerably increasing the cost of PEMFC technology. To overcome the requirement of precious metal catalysts, anion exchange membrane fuel cell (AEMFC) technology has begun to attract recent attention. This new effort focused on AEMFCs is due to several potential advantages that anion exchange membranes hold over their acidic membrane counterparts. In AEMFCs, oxygen reduction kinetics is improved in the high pH environment of the membrane and the use of non-precious metals as electrocatalysts greatly reduces the cost of fuel cell devices.6-8 A highlyconductive, chemically robust anion exchange membrane (AEM) is a crucial component of the fuel cell as it acts as a barrier between the fuel and oxidant streams while simultaneously transporting anions from the cathode to the anode. and imidazoilum 36-38 groups. It is known that the quaternary ammonium moiety is susceptible to hydroxide attack, resulting in degradation of alkaline membrane at elevated temperature under alkaline conditions, but clear pathways for degradation of polymer backbones and other functional groups of AEMs including non-ammonium cations has not been extensively pursued. In general, the degradation pathways for the tetra-alkyl quaternary ammonium cations...

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“…This value is comparable to those reported in the literature for anion conductive membranes or ionomers. For example, an irradiation derived, quaternary ammonium functionalized FEP anion exchange membrane shows an IEC of 1.08 mmol g −1 [22], while an AEM of poly(methyl methacrylate- co-butyl acrylate-co-vinylbenzyl chloride) (also ammonium type) has an IEC value of 1.25 mmol g −1 [23]; in other cases, IEC of 1.3 mmol g −1 was reported for anionic membrane based on polyepichlorhydrin matrix (functionalized with a cyclic diamine DABCO) [24], and 1.14 mmol g −1 reported for an hydroxide conductive ionomer of poly(vinylbenzyl chloride) cross-linked with a diamine [13]. Poly (arylene ether sulfone) ionomers with pendant quaternary ammonium exhibits high IEC ranging from 1.58 to 3.02 mmol g −1 (corresponding to substitution degree of 40-90%) [5].…”

Section: Resultsmentioning

confidence: 99%

Poly(vinylidene fluoride) based anion conductive ionomer as a catalyst binder for application in anion exchange membrane fuel cell

Zhang

et al. 2011

Journal of Power Sources

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Anionic membrane based on polyepichlorhydrin matrix for alkaline fuel cell: Synthesis, physical and electrochemical properties

Cited by 159 publications

References 17 publications

Polymer anion-selective membranes for electrolytic splitting of water. Part II: Enhancement of ionic conductivity and performance under conditions of alkaline water electrolysis

Polymer anion-selective membranes for electrolytic splitting of water. Part II: Enhancement of ionic conductivity and performance under conditions of alkaline water electrolysis

Characterization and Chemical Stability of Anion Exchange Membranes Cross-Linked with Polar Electron-Donating Linkers

Poly(vinylidene fluoride) based anion conductive ionomer as a catalyst binder for application in anion exchange membrane fuel cell

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