Fabrication of N1-butyl substituted 4,5-dimethyl-imidazole based crosslinked anion exchange membranes for fuel cells

Hao, Jinkai; Gao, Xudong; Jiang, Yabin; Xie, Feng; Shao, Zhigang; Yi, Baolian

doi:10.1039/c7ra08966j

Cited by 21 publications

(17 citation statements)

References 51 publications

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“…However, the CImTPAEKS membranes did not show a very high SR, which may be because the cross-linked structures in the CImTPAEKS membranes increased the force between the molecular chains, avoiding the poor dimensional stability caused by excessive swelling. [71][72][73]…”

Section: Water Uptake and Swelling Ratiomentioning

confidence: 99%

Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

Yang

et al. 2021

Int J Energy Res

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Section: Water Uptake and Swelling Ratiomentioning

confidence: 99%

Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

Yang

et al. 2021

Int J Energy Res

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“…Ionic conductivity is a dominant factor which determine the overall performance of the anion exchange membranes. In general, ionic conductivity of membranes differs according to the several of complex factors, such as the type of polymer and the type of functional group [29,30]. Conductivity of the fabricated Q-PAES was quantified at diversified temperatures under 100% relative humidity (RH).…”

Section: Ion Conductivity and Activation Energymentioning

confidence: 99%

Anion Exchange Membranes Obtained from Poly(arylene ether sulfone) Block Copolymers Comprising Hydrophilic and Hydrophobic Segments

et al. 2020

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The anion exchange membrane may have different physical and chemical properties, electrochemical performance and mechanical stability depending upon the monomer structure, hydrophilicity and hydrophobic repeating unit, surface form and degree of substitution of functional groups. In current work, poly(arylene ether sulfone) (PAES) block copolymer was created and used as the main chain. After controlling the amount of NBS, the degree of bromination (DB) was changed in Br-PAES. Following that, quaternized PAES (Q-PAES) was synthesized through quaternization. Q-PAES showed a tendency of enhancing water content, expansion rate, ion exchange capacity (IEC) as the degree of substitution of functional groups increased. However, it was confirmed that tensile strength and dimensional properties of membrane reduced while swelling degree was increased. In addition, phase separation of membrane was identified by atomic force microscope (AFM) image, while ionic conductivity is greatly affected by phase separation. The Q-PAES membrane demonstrated a reasonable power output of around 64 mW/cm2 while employed as electrolyte in fuel cell operation.

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“…Based on one of the most common members of the family, the poly [2-2′-(m-phenylene)-5-5′-bibenzimidazole] (PBI), and the crosslinking reaction with poly(vinylbenzylchloride) (PVBC), Lu et al [ 16 ] synthesized various membranes and studied their application in a single H 2 /O 2 fuel cell. Then they continued working with these types of membranes with various modifications and testing them for the same application [ 14 , 17 ]. They obtained a maximum peak power density of 230 mW cm −2 at 50 °C working with a PBI-c-PVBC membrane quaternized with 1,4-diazabicyclo[2.2.2]octane (DABCO) and the membrane presented good durability and stability [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Crosslinked Polybenzimidazole-Poly(Vinyl Benzyl Chloride) Anion Exchange Membranes in Direct Ethanol Fuel Cells

et al. 2020

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Crosslinked membranes have been synthesized by a casting process using polybenzimidazole (PBI) and poly(vinyl benzyl chloride) (PVBC). The membranes were quaternized with 1,4-diazabicyclo[2.2.2]octane (DABCO) to obtain fixed positive quaternary ammonium groups. XPS analysis has showed insights into the changes from crosslinked to quaternized membranes, demonstrating that the crosslinking reaction and the incorporation of DABCO have occurred, while the 13C-NMR corroborates the reaction of DABCO with PVBC only by one nitrogen atom. Mechanical properties were evaluated, obtaining maximum stress values around 72 MPa and 40 MPa for crosslinked and quaternized membranes, respectively. Resistance to oxidative media was also satisfactory and the membranes were evaluated in single direct ethanol fuel cell. PBI-c-PVBC/OH 1:2 membrane obtained 66 mW cm−2 peak power density, 25% higher than commercial PBI membranes, using 0.5 bar backpressure of pure O2 in the cathode and 1 mL min−1 KOH 2M EtOH 2 M aqueous solution in the anode. When the pressure was increased, the best performance was obtained by the same membrane, reaching 70 mW cm−2 peak power density at 2 bar O2 backpressure. Based on the characterization and single cell performance, PBI-c-PVBC/OH membranes are considered promising candidates as anion exchange electrolytes for direct ethanol fuel cells.

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Fabrication of N1-butyl substituted 4,5-dimethyl-imidazole based crosslinked anion exchange membranes for fuel cells

Abstract: Novel N1, C4, C5-substituted imidazolium-based crosslinked anion exchange membranes (AEMs) are prepared by the incorporation of polybenzimidazole (PBI) into the poly(vinylbenzyl chloride) (PVBC) matrix.

Cited by 21 publications

References 51 publications

Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

Anion Exchange Membranes Obtained from Poly(arylene ether sulfone) Block Copolymers Comprising Hydrophilic and Hydrophobic Segments

Application of Crosslinked Polybenzimidazole-Poly(Vinyl Benzyl Chloride) Anion Exchange Membranes in Direct Ethanol Fuel Cells

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