Anion exchange membrane using poly(ether ether ketone) containing imidazolium for anion exchange membrane fuel cell (AEMFC)

Son, Tae Yang; Kim, Deuk Ju; Vijayakumar, Vijayalekshmi; Kım, Kihyun; Kim, Dae Sik; Nam, Sang Yong

doi:10.1016/j.jiec.2020.05.009

Cited by 38 publications

(15 citation statements)

References 36 publications

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“…2,4,15 Moreover, many aryl ether polymer backbones (such as polyether-ether-ketone and polysulfone) have been documented to be easily cleaved under alkaline conditions. 26–28 Hence, developing highly conductive and durable AEMs and ionomers is critical for modern AEMFCs.…”

Section: Introductionmentioning

confidence: 99%

Di-piperidinium-crosslinked poly(fluorenyl-co-terphenyl piperidinium)s for high-performance alkaline exchange membrane fuel cells

Chen

Park

et al. 2022

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

Di-piperidinium-crosslinked poly(fluorenyl-co-terphenyl piperidinium)s for high-performance alkaline exchange membrane fuel cells

Chen

Park

et al. 2022

J. Mater. Chem. A

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“…As key components in all of these abovementioned applications, different kinds of alkaline anion exchange membranes (AAEMs) with rigid backbone structures, such as poly(aryl ether), poly(ether ether ketone), poly(arylene ether sulfone), polysulfone, polybenzimidazole, , polyethylene, , poly(vinylbenzyl chloride), poly(phenylene oxide), − poly(styrene- co -vinylbenzyl chloride), and fluorinated polymers, , have been reported in the literature in the past few years. A typical AAEM is composed of a polymer main chain with tethered cation ionic-exchange groups such as quaternary ammonium (QA), − imidazolium, − benzimidazolium, ,− pyridinium, ,, phosphonium, sulfonium, guanidinium, piperidinium, , pyrrolidinium, azepanium, morpholinium, and quinuclidium to facilitate the loading of free hydroxyl ions.…”

Section: Introductionmentioning

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 first is the active development of methanol fuel cells [ 1 , 2 ] and redox flow batteries, in particular vanadium flow batteries using AEMs [ 3 ]. To ensure high performance of these new devices, AEMs are required that have high hydroxyl ion conductivity, mechanical robustness and high resistance to aggressive media, in particular, the membranes must be stable in a strongly alkaline environment [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Transport Characteristics of CJMAED™ Homogeneous Anion Exchange Membranes in Sodium Chloride and Sodium Sulfate Solutions

Сарапулова

Pismenskaya

Titorova

et al. 2021

IJMS

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The interplay between the ion exchange capacity, water content and concentration dependences of conductivity, diffusion permeability, and counterion transport numbers (counterion permselectivity) of CJMA-3, CJMA-6 and CJMA-7 (Hefei Chemjoy Polymer Materials Co. Ltd., China) anion-exchange membranes (AEMs) is analyzed using the application of the microheterogeneous model to experimental data. The structure–properties relationship for these membranes is examined when they are bathed by NaCl and Na2SO4 solutions. These results are compared with the characteristics of the well-studied homogenous Neosepta AMX (ASTOM Corporation, Japan) and heterogeneous AMH-PES (Mega a.s., Czech Republic) anion-exchange membranes. It is found that the CJMA-6 membrane has the highest counterion permselectivity (chlorides, sulfates) among the CJMAED series membranes, very close to that of the AMX membrane. The CJMA-3 membrane has the transport characteristics close to the AMH-PES membrane. The CJMA-7 membrane has the lowest exchange capacity and the highest volume fraction of the intergel spaces filled with an equilibrium electroneutral solution. These properties predetermine the lowest counterion transport number in CJMA-7 among other investigated AEMs, which nevertheless does not fall below 0.87 even in 1.0 eq L−1 solutions of NaCl or Na2SO4. One of the reasons for the decrease in the permselectivity of CJMAED membranes is the extended macropores, which are localized at the ion-exchange material/reinforcing cloth boundaries. In relatively concentrated solutions, the electric current prefers to pass through these well-conductive but nonselective macropores rather than the highly selective but low-conductive elements of the gel phase. It is shown that the counterion permselectivity of the CJMA-7 membrane can be significantly improved by coating its surface with a dense homogeneous ion-exchange film.

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Anion exchange membrane using poly(ether ether ketone) containing imidazolium for anion exchange membrane fuel cell (AEMFC)

Cited by 38 publications

References 36 publications

Di-piperidinium-crosslinked poly(fluorenyl-co-terphenyl piperidinium)s for high-performance alkaline exchange membrane fuel cells

Di-piperidinium-crosslinked poly(fluorenyl-co-terphenyl piperidinium)s for high-performance alkaline exchange membrane fuel cells

Cross-Linked Polybenzimidazoles as Alkaline Stable Anion Exchange Membranes

Transport Characteristics of CJMAED™ Homogeneous Anion Exchange Membranes in Sodium Chloride and Sodium Sulfate Solutions

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