Chemically stable anion exchange membranes based on C2-Protected imidazolium cations for vanadium flow battery

Xing, Yi; Geng, Kang; Chu, Xiaomeng; Wang, Chenyi; Liu, Lei; Li, Nanwen

doi:10.1016/j.memsci.2020.118696

Cited by 52 publications

(27 citation statements)

References 48 publications

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“…Moreover, the deposition of V 2 O 5 would occur, which occupied the reaction sites of the carbon felt, causing the EE and VE decrease [73]. In addition, the plastic deformation of the membrane during the charge-discharge process, probably resulting from precipitation and dissolution of vanadium ions in and out of the membrane as well as the swelling and shrinking of membranes in electrolytes, might result in decreased VE and EE as well [74]. Nevertheless, the PTP-QA-based cells exhibited higher CE, VE, and EE than the Nafion 115-based cells during 156 cycles.…”

Section: Vrfb Performancementioning

confidence: 99%

“…The asymmetric transfer of various ions and water across membranes would lead to active species imbalance of the electrolyte [6]. Meanwhile, the capacity decay rate of the cell is related to the thickness of the membrane [74]. Although the vanadium ion permeability of PTP-QA was much lower than that of Nafion 115, the thickness of Nafion 115 was around 2.5 times higher than that of PTP-QA.…”

Section: Vrfb Performancementioning

confidence: 99%

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Anion exchange membranes based on long side-chain quaternary ammonium-functionalized poly(arylene piperidinium)s for vanadium redox flow batteries

et al. 2021

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Section: Vrfb Performancementioning

confidence: 99%

Section: Vrfb Performancementioning

confidence: 99%

Anion exchange membranes based on long side-chain quaternary ammonium-functionalized poly(arylene piperidinium)s for vanadium redox flow batteries

et al. 2021

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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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“…To investigate the chemical stability of AEMs for stable vanadium redox flow battery, a series of C2 nonsubstitute FG17, C2-methyl substituted FG18, C2-phenyl substituted imidazolium FG20 and C2-phenyl substituted benzimidazolium FG21 were synthesized and incorporated into the PES skeleton. 75 The C2 protected imidazolium functionalized AEMs were chemically stable and did not detect degradation in NMR analysis after immersion in 1.5 M VO 2+ /3 M H 2 SO 4 at 40 C for 90 days. Moreover, the PES based on C2-methyl substituted imidazolium demonstrated relatively low area resistance, high vanadium permeability, and good cycling performance.…”

Section: Pes-based Aems Via Cuaacmentioning

confidence: 89%

Advance of click chemistry in anion exchange membranes for energy application

Yang

Chen

Yan

et al. 2022

Journal of Polymer Science

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Click chemistry has attracted tremendous attention in polymer synthesis due to its high efficiency, considerable yield, and simple synthesis/work-up procedures. Among the various functional polymer materials prepared by click chemistry, anion exchange membrane (AEM) is a kind of polyelectrolyte which contains cations attached to the polymer skeleton. Click chemistry not only provides facile pathways for the preparation of AEMs but also generates diverse architectures of AEMs with robust performance. The commonly used click chemistry in AEMs consists of: (i) Diels-Alder reaction, (ii) thiol-ene, and (iii) Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC). This review will focus on the advance of click chemistry in the preparation of AEMs, especially synthetic approaches for different AEMs and their corresponding application in energy-related fields, such as fuel cells, redox flow battery, electrodialysis, and so on.

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Chemically stable anion exchange membranes based on C2-Protected imidazolium cations for vanadium flow battery

Cited by 52 publications

References 48 publications

Anion exchange membranes based on long side-chain quaternary ammonium-functionalized poly(arylene piperidinium)s for vanadium redox flow batteries

Anion exchange membranes based on long side-chain quaternary ammonium-functionalized poly(arylene piperidinium)s for vanadium redox flow batteries

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

Advance of click chemistry in anion exchange membranes for energy application

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