Flexible cationic side chains for enhancing the hydroxide ion conductivity of olefinic-type copolymer-based anion exchange membranes: An experimental and theoretical study

Pan, Ji Sheng; Zhu, Hairong; Cao, Huixing; Wang, Bowen; Zhao, Junliang; Sun, Zhe; Yan, Feng

doi:10.1016/j.memsci.2020.118794

Cited by 30 publications

(11 citation statements)

References 65 publications

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“…The IEC values of the AEMs are comparable to many reported ones containing the ether bond in the copolymer backbone. 30–33 The theoretical IEC values of bPES(5/10)-Q and bPES(5/20)-Q are 2.8 mequiv. g −1 and 3.1 mequiv.…”

Section: Resultsmentioning

confidence: 99%

New block poly(ether sulfone) based anion exchange membranes with rigid side-chains and high-density quaternary ammonium groups for fuel cell application

Huang

Xie

et al. 2022

Polym. Chem.

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Section: Resultsmentioning

confidence: 99%

New block poly(ether sulfone) based anion exchange membranes with rigid side-chains and high-density quaternary ammonium groups for fuel cell application

Huang

Xie

et al. 2022

Polym. Chem.

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“…The ionic conductivities of CPBPBI-OH membranes have been considerably improved in contrast to the corresponding imidazolium cationic-based polymeric membranes and other cationic membranes reported in the literature. 17,45,64,65 The introduction of the additional phenyl-substituted pyridinium group between the two benzimidazolium moieties resulted in enhanced conductivity. This pyridinium group can also act as an anion exchange site, and it helps transport hydroxide (OH − ) ions through the AAEM along with benzimidazolium cationic sites.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Cross-Linked Polybenzimidazoles as Alkaline Stable Anion Exchange Membranes

Sana

Das

Jana

2022

ACS Appl. Energy Mater.

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Despite the large volume of literature on alkaline anion exchange membranes (AAEMs), the development of efficient AAEMs with excellent alkaline stability and superior hydroxide conductivity is the major challenge. To mitigate this problem, cross-linked poly(butylated pyridinium benzimidazolium) iodide (CPBPBI) membranes were synthesized from pyridine-bridged polybenzimidazole (PyPBI) utilizing butyl iodide as the alkylating agent and 1,4-diiodobutane as a cross-linker. The AAEMs were fabricated by dipping the CPBPBI membranes in KOH to obtain CPBPBI-OH. Among the several structural variations, the CPBPBI-OBA-OH membrane displayed the highest hydroxide conductivities of 39.4 and 111 mS/cm at 30 and 80 °C, respectively. The ion exchange capacity (IEC) of CPBPBI-OH membranes was found to be altered in the range of 2.30–3.97 mequiv·g–1 at an ambient temperature depending on the polymer structure. The membranes studied in 5 M KOH solution at 80 °C for 16 days showed excellent chemical and dimensional stability. The IEC, Fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance (NMR) spectra, and hydroxide ionic conductivity data of the AAEMs were compared before and after the chemical stability test, and all of these investigations proved that the membranes were highly stable in concentrated alkaline solution and almost zero or very negligible degradation was observed after harsh alkali treatment. The negligible loss of hydroxide ion conductivity of membranes even after 16 days in 5 M KOH treatment at 80 °C is attributed to the cross-linking formation that prevented the attack of OH– ions on C2 imidazolium moieties. Furthermore, the thermal and mechanical properties of the AAEMs showed excellent thermomechanical stability. Overall, the cross-linking of the PyPBI chains immensely helped in improving various physical properties, particularly hydroxide conductivity, alkaline stability, and mechanical robustness, which are important for the development of efficient AAEMs.

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“…The result of both experiment and molecular dynamics simulations indicated that AEMs with di‐cations exhibit better water uptake, swelling ratio, alkaline stability, and higher ionic conductivity than those with mono‐ cations. [ 39 ]…”

Section: Pil Type Polyelectrolytes For Energy Devicesmentioning

confidence: 99%

Poly(ionic liquid)‐Based Energy and Electronic Devices

et al. 2022

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Dr. Jiangna Guo obtained her doctoral degree from Soochow University in 2016. After graduation, she joined Soochow University. Her research interests focus on functional poly(ionic liquid)-based antibacterial materials.Dr. Zhe Sun received his Ph.D. from Soochow University in 2018 and joined Soochow University in the same year. His research interests focus on the application of poly(ionic liquid)s in energy devices.

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Flexible cationic side chains for enhancing the hydroxide ion conductivity of olefinic-type copolymer-based anion exchange membranes: An experimental and theoretical study

Cited by 30 publications

References 65 publications

New block poly(ether sulfone) based anion exchange membranes with rigid side-chains and high-density quaternary ammonium groups for fuel cell application

New block poly(ether sulfone) based anion exchange membranes with rigid side-chains and high-density quaternary ammonium groups for fuel cell application

Cross-Linked Polybenzimidazoles as Alkaline Stable Anion Exchange Membranes

Poly(ionic liquid)‐Based Energy and Electronic Devices

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