Prospects of practical application of hybrid membranes

Safronova, E. Yu.; Yaroslavtsev, A. B.

doi:10.1134/s0965544116040083

Cited by 47 publications

(16 citation statements)

References 168 publications

(158 reference statements)

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“…It is generally accepted that the composition of this electrically neutral solution is close to that of the solution contacting with the membrane. When membranes are used in electrodialysis or reverse electrodialysis, the concentration of contacting solution can be rather high [ 16 , 31 , 66 ]. Moreover, in the central part of the pore, there are a lot of cations and anions which can contribute significantly to the conductivity.…”

Section: The Ion Exchange Membrane Structure and Ion Transfermentioning

confidence: 99%

“…Some authors also note an improvement in their mechanical properties [ 177 , 207 , 208 ]. Although it is not always achieved, the mechanical properties of hybrid membranes are usually sufficient for their practical use [ 16 , 209 ].…”

Section: Hybrid Membranesmentioning

confidence: 99%

“…A noteworthy advantage of hybrid membranes is often their reduced permeability of methanol and other fuel gases [ 202 , 210 , 211 , 212 ]. This determines, in particular, the widespread use of hybrid membranes in direct methanol fuel cells (DMFCs) [ 16 , 213 , 214 ]. A comparison of proton conductivity and methanol permeability for a number of hybrid membranes is given in Table 1 .…”

Section: Hybrid Membranesmentioning

confidence: 99%

“…Ion exchange membranes (IEMs) are actively used in modern technologies, including water purification, concentration, electrochemical synthesis, and sensors [ 1 , 2 , 3 , 4 , 5 ]. Their use in fuel cells [ 6 , 7 , 8 , 9 ], in energy storage and conversion systems, e.g., metal-ion batteries [ 10 , 11 , 12 ], reverse electrodialysis [ 13 , 14 , 15 ], and redox batteries [ 16 , 17 , 18 , 19 ] has received the most attention in recent years. There are a number of other technologies in which ion-exchange membranes can also be used.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, the ion separation by membranes never occurs with 100% selectivity and is usually accompanied by an undesired transfer of molecules or opposite charged ions. Despite the fact that these processes proceed to a much less extent, they usually determine the decrease in the efficiency of electrodialysis, fuel cells and other devices based on ion-exchange membranes [ 16 , 28 , 29 , 30 ]. That is why their understanding is so important for numerous membrane technologies.…”

Section: Introductionmentioning

confidence: 99%

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Selectivity of Transport Processes in Ion-Exchange Membranes: Relationship with the Structure and Methods for Its Improvement

Стенина

Голубенко

Nikonenko

et al. 2020

IJMS

127

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Nowadays, ion-exchange membranes have numerous applications in water desalination, electrolysis, chemistry, food, health, energy, environment and other fields. All of these applications require high selectivity of ion transfer, i.e., high membrane permselectivity. The transport properties of ion-exchange membranes are determined by their structure, composition and preparation method. For various applications, the selectivity of transfer processes can be characterized by different parameters, for example, by the transport number of counterions (permselectivity in electrodialysis) or by the ratio of ionic conductivity to the permeability of some gases (crossover in fuel cells). However, in most cases there is a correlation: the higher the flux density of the target component through the membrane, the lower the selectivity of the process. This correlation has two aspects: first, it follows from the membrane material properties, often expressed as the trade-off between membrane permeability and permselectivity; and, second, it is due to the concentration polarization phenomenon, which increases with an increase in the applied driving force. In this review, both aspects are considered. Recent research and progress in the membrane selectivity improvement, mainly including a number of approaches as crosslinking, nanoparticle doping, surface modification, and the use of special synthetic methods (e.g., synthesis of grafted membranes or membranes with a fairly rigid three-dimensional matrix) are summarized. These approaches are promising for the ion-exchange membranes synthesis for electrodialysis, alternative energy, and the valuable component extraction from natural or waste-water. Perspectives on future development in this research field are also discussed.

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Section: The Ion Exchange Membrane Structure and Ion Transfermentioning

confidence: 99%

Section: Hybrid Membranesmentioning

confidence: 99%

Section: Hybrid Membranesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Selectivity of Transport Processes in Ion-Exchange Membranes: Relationship with the Structure and Methods for Its Improvement

Стенина

Голубенко

Nikonenko

et al. 2020

IJMS

127

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The influence of poly(3,4‐ethylenedioxythiophene) modification on the transport properties and fuel cell performance of Nafion‐117 membranes

Стенина

Yurova

Titova

et al. 2021

J of Applied Polymer Sci

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Nafion‐117/PEDOT composite membranes were synthesized by in situ chemical polymerization of 3,4‐ethylenedioxythiophene (EDOT) using ammonium persulfate as an oxidant. The polymerization of EDOT in Nafion membranes for various EDOT/oxidant treatment sequences was studied for the first time. PEDOT introduction leads to a slight decrease in both the ion‐exchange capacity and water uptake of the composite membranes, as well as to an increase in cationic transport. Membranes initially treated with an oxidant exhibit better conductivity and lower hydrogen permeability. The effect of both modification of Nafion‐117 membranes by PEDOT and hot‐pressing of hydrogen‐oxygen membrane‐electrode assemblies (MEAs) on the performance of proton‐exchange membrane fuel cells was studied. The maximum power density of the fabricated MEAs increases 1.5‐fold: from 510 (for a pristine Nafion‐117 membrane) to 810 mW cm−2 (for a membrane modified by PEDOT). The current density at a voltage of 0.4 V reaches 1248 and 2246 mA cm−2, respectively.

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Orientational uniaxial stretching of proton conducting perfluorinated membranes

Primachenko

Kulvelis

Marinenko

et al. 2022

J of Applied Polymer Sci

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The Aquivion ® -type perfluorinated proton conducting membranes were studied subjected to a specially developed technique of uniaxial orientational stretching.Membranes were prepared from copolymer produced by aqueous-emulsion copolymerization and by pressing the melt copolymer precursor or by casting a solution of copolymer in sulfonyl alkaline form in dimethylformamide. The possibilities of the regulation of electrochemical and physical-chemical properties of Aquivion ® -type membranes using the method of orientational stretching are demonstrated. Proton conductivity rises in the stretching direction due to the straightening of the pathways for protons in membranes found by small-angle neutron scattering technique.

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Prospects of practical application of hybrid membranes

Cited by 47 publications

References 168 publications

Selectivity of Transport Processes in Ion-Exchange Membranes: Relationship with the Structure and Methods for Its Improvement

Selectivity of Transport Processes in Ion-Exchange Membranes: Relationship with the Structure and Methods for Its Improvement

The influence of poly(3,4‐ethylenedioxythiophene) modification on the transport properties and fuel cell performance of Nafion‐117 membranes

Orientational uniaxial stretching of proton conducting perfluorinated membranes

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