Quaternized polybenzimidazoles with imidazolium cation moieties for anion exchange membrane fuel cells

Polybenzimidazole-crosslinked poly(vinylbenzyl chloride) with quaternary 1,4-diazabicyclo (2.2.2) octane groups as high-performance anion exchange membrane for fuel cells

“…6a). The calculated E a for PBI-c-PVBC/OH was 5.5 kJ mol À1 , which is smaller than that of AEM usually reported in the literature (8e30 kJ mol À1 ) [13,46e49], indicating the low resistance of OH À transport in the membrane probably due to the side-chain-type ionic transport group (quaternized DABCO) and conductive main-chain backbone (conductive crosslinking point in PBI) [46,48]. Despite of such high hydroxide conductivity, the swelling degree and water uptake of PBI-c-PVBC/OH was only~13% and~67%, respectively, and they nearly did not grow with the increase of temperature (Fig.…”

Preparation of anion exchange membrane using polyvinyl chloride (PVC) for alkaline water electrolysis

“…In general, the optimal water content is that which allows the best ion exchange capacity-ionic conductivity combination [12]. From this viewpoint, the results suggest that the optimal water content of the prepared anion exchange membrane for a good ionic conductivity and ion exchange capacity is in the range of 30-35%.…”

“…Several researchers [9][10][11][12][13][14][15] have reported the preparation of anion exchange membranes from poly(phthalazinone ether sulfone ketone), poly(ether imide), quaternary-ammonium-functionalized radiationgrafted ETFE (ethylene tetrafluoroethylene), quaternized polybenzimidazoles, and polyepichlorohydrin matrices for alkaline fuel cells and Donnan dialysis.…”

Anion exchange membranes based on carbazole-containing polyolefin for direct methanol fuel cells

“…One of the most effective methods for producing the AEMs is to introduce functional quaternary ammonium groups into a polymer matrix. The polymers including polysulfone [10], poly (ether sulfone) [11], poly (ether sulfone ketone) [12], poly (ether imide) [13], polybenzimidazole [14], cardo-polyetherketone [15] have been used to prepare AEMs by this method. However, most of the AEMs mentioned above were prepared by chloromethylation of the polymers with chloromethyl ether, a harmful process to the environment, followed by quaternization to form quaternary ammonium cation.…”