Proton exchange membrane from the blend of poly(vinylidene fluoride) and functional copolymer: Preparation, proton conductivity, methanol permeability, and stability

Patnaik, Pratyush; Mondal, Rakhi; Sarkar, Suman; Choudhury, Arani; Chatterjee, Uma

doi:10.1016/j.ijhydene.2022.02.162

Cited by 29 publications

(8 citation statements)

References 52 publications

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“…The water uptake (WU) and swelling ratio (SR, %) of the prepared crosslinked AEMs (MQ1, MQ6, MQ10, and MQ18) and uncrosslinked AEMs (Q1 and Q18) in water were determined. Evidence for the crosslinking reaction was obtained by measuring the extractables (%) in DMF under stirring for 2 h at 60 ο C. , Electrochemical characterizations such as the ion-exchange capacity (IEC), fixed charge density ( X m ), and the activation energy ( E a ) of the crosslinked AEMs were determined at room temperature as per the reported procedure . Experimental details are given in the Supporting Information.…”

Section: Characterizationsmentioning

confidence: 99%

“…IEMs are also used extensively in diffusion dialysis (DD) for acid recovery, 1,2 water desalination, 3 metathesis electrodialysis, 4 and fuel cell applications. 5 The separation of monovalent anions from their mixture with multivalent anions present in an aqueous solution is essential to maintain product purity. The separation of ions mainly depends on different properties of ions (ionic radii, hydration energy of hydrated ions, and electrostatic repulsion).…”

Section: Introductionmentioning

confidence: 99%

“…IEMs play a prominent role in ED due to their selectivity toward ions. IEMs are also used extensively in diffusion dialysis (DD) for acid recovery, , water desalination, metathesis electrodialysis, and fuel cell applications . The separation of monovalent anions from their mixture with multivalent anions present in an aqueous solution is essential to maintain product purity.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of a Monovalent-Selective Anion-Exchange Membrane: Effect of Alkyl Chain Length and Crystallinity

Mondal

Sarkar

Patnaik

et al. 2023

ACS Appl. Polym. Mater.

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Crosslinked anion-exchange membranes (AEMs) with reasonable water uptake are used for the separation of monovalent anions from their mixture with bivalent anions by electrodialysis (ED). Herein, we report the preparation of a series of monovalent-selective crosslinked AEMs containing imidazole rings from the polyacrylonitrile-co-poly(vinylimidazole) (PAN-co-PVIm) copolymer (AN/VIm ratio = 75:25 mol/mol), followed by N-alkylation with alkyl halide of different chain lengths (carbon number: 1,6,10,18), followed by reaction with 1,6-diamino hexane. The difference in the obtained permselectivity (P SO4 2– Cl– ) was compared with those of un-crosslinked and commercial Ionsep membranes. The effects of crosslinking, the chain length of the alkyl spacer attached to imidazolium nitrogen of the membrane matrix, and the partial crystallinity occurring due to the arrangement of long alkyl chains on P SO4 2– Cl– were investigated. A representative crosslinked membrane (MQ18) with an octadecyl alkyl chain length (C18) attached to the imidazole moiety exhibited moderate water uptake (22%), high fixed charge density (0.037 meq/cm3), and high P SO4 2– Cl– (6.4) during the separation of a mixture of 0.01 M sodium chloride and 0.01 M sodium sulfate (2000 mg/L) by the ED process. The P SO4 2– Cl– value is further increased from 6.4 to 16.7 by increasing the electrolyte concentration to 0.05 M sodium chloride and 0.05 M sodium sulfate. The rigid imidazolium structure, locally organized higher chain length of the alkylating group, and the crosslinked network structure provide steric hindrance for the passage of more hydrophilic sulfate anions, which facilitates higher selectivity.

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Section: Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of a Monovalent-Selective Anion-Exchange Membrane: Effect of Alkyl Chain Length and Crystallinity

Mondal

Sarkar

Patnaik

et al. 2023

ACS Appl. Polym. Mater.

Self Cite

View full text Add to dashboard Cite

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“…Therefore, the membrane usually extends along the edges of the porous catalytic electrodes. The materials known to be suitable for use in this design are rubber washers [97], PTFE films [98], and polyvinylidene fluoride [99]. Finally, to complete the assembly, the fuel-cell assembly and the gasket are pressed together to form a sealing structure.…”

Section: Sealing and Compression Kitsmentioning

confidence: 99%

A Review on the Long-Term Performance of Proton Exchange Membrane Fuel Cells: From Degradation Modeling to the Effects of Bipolar Plates, Sealings, and Contaminants

et al. 2022

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Proton-exchange membrane fuel cells (PEMFCs) are regarded as promising alternatives to internal combustion engines (ICEs) to reduce pollution. Recent research on PEMFCs focuses on achieving higher power densities, reducing the refueling time, mitigating the final price, and decreasing the degradations, to facilitate the commercialization of hydrogen mobility. The design of bipolar plates and compression kits, in addition to their coating, can effectively improve performance, increase durability, and support water/thermal management. Past reviews usually focused on the specific aspect, which can hardly provide readers with a complete picture of the key challenges facing and advances in the long-term performance of PEMFCs. This paper aims to deliver a comprehensive source to review, from both experimental, analytical and numerical viewpoints, design challenges, degradation modeling, protective coatings for bipolar plates, and key operational challenges facing and solutions to the stack to prevent contamination. The significant research gaps in the long-term performance of PEMFCs are identified as (1) improved bipolar-plate design and coating, (2) the optimization of the design of sealing and compression kits to reduce mechanical stresses, and (3) stack degradation regarding fuel contamination and dynamic operation.

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“…Nowadays, the strategies and techniques for the preparation of PEM mainly include recasting or blending [ 19 , 20 , 21 ], hot-pressing [ 22 , 23 ] and impregnation [ 24 , 25 , 26 , 27 ]. Recasting is a simple and low-cost membrane formation method that can offer easy optimization of the processing parameters.…”

Section: Introductionmentioning

confidence: 99%

Precise Control of the Preparation of Proton Exchange Membranes via Direct Electrostatic Deposition

et al. 2022

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In this work, we reported a novel preparation method for a proton exchange membrane (PEM) named, the direct electrostatic deposition method. In theory, any required thickness and size of PEM can be precisely controlled via this method. By direct electrostatic spraying of Nafion solution containing amino modified SiO2 nanoparticles onto a metal collector, a hybrid membrane of 30 μm thickness was fabricated. The DMFC assembled with a prepared ultrathin membrane showed a maximum power density of 124.01 mW/cm2 at 40 °C and 100% RH, which was 95.29% higher than that of Nafion. This membrane formation method provides potential benefits for the preparation of ultrathin PEMs.

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Proton exchange membrane from the blend of poly(vinylidene fluoride) and functional copolymer: Preparation, proton conductivity, methanol permeability, and stability

Cited by 29 publications

References 52 publications

Preparation of a Monovalent-Selective Anion-Exchange Membrane: Effect of Alkyl Chain Length and Crystallinity

Preparation of a Monovalent-Selective Anion-Exchange Membrane: Effect of Alkyl Chain Length and Crystallinity

A Review on the Long-Term Performance of Proton Exchange Membrane Fuel Cells: From Degradation Modeling to the Effects of Bipolar Plates, Sealings, and Contaminants

Precise Control of the Preparation of Proton Exchange Membranes via Direct Electrostatic Deposition

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