A highly durable cross-linked hydroxide ion conducting pore-filling membrane

Lee, Mi-Soon; Kim, Tae‐Young; Park, Seok-Hee; Kim, Chang-Soo; Choi, Young‐Woo

doi:10.1039/c2jm32628k

Cited by 43 publications

(30 citation statements)

References 20 publications

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“…Alternatively, heterogeneous AEM can be prepared using (a) a pore filling or pore immersion technique which synthesizes polymeric membranes on a porous support or (b) mixed matrix membranes that fix inorganic nanoparticles in organic polymers [5]. Pore filling and pore immersion are similar techniques in that a polymer solution is either poured over or immersed in a porous substrate allowing the polymer matrix to fill the porous substrate pores creating a membrane [96][97][98][99]. The porous substrate is selected to be chemically inert and mechanically stable (e.g.…”

Section: Advancements In Aem Preparation Methodsmentioning

confidence: 99%

“…This technique combines the beneficial characteristics of the polymer (high ion conductivity) and porous support (mechanical strength and reduced membrane swelling) to produce membranes with improved performance [100]. While this method may involve repeated pouring and immersion steps, the literature sources have reported the ability to obtain both cation and anion exchange membranes with high IEC [97,98,101]. Work by Lee et al [98] relating to anion exchange membranes is significant as AEM with high IEC were achieved without significant membrane swelling, which was attributed to the use of the porous substrate.…”

Section: Advancements In Aem Preparation Methodsmentioning

confidence: 99%

“…While this method may involve repeated pouring and immersion steps, the literature sources have reported the ability to obtain both cation and anion exchange membranes with high IEC [97,98,101]. Work by Lee et al [98] relating to anion exchange membranes is significant as AEM with high IEC were achieved without significant membrane swelling, which was attributed to the use of the porous substrate. This produced membranes with improved mechanical strength compared to similar AEMs synthesized without porous supports.…”

Section: Advancements In Aem Preparation Methodsmentioning

confidence: 99%

“…This produced membranes with improved mechanical strength compared to similar AEMs synthesized without porous supports. Additionally, by using a porous support, AEMs could be synthesized with multiple narrow ion channels that allowed for the high OHconductivity [98].…”

Section: Advancements In Aem Preparation Methodsmentioning

confidence: 99%

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A review of the synthesis and characterization of anion exchange membranes

2018

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This review highlights advancements made in anion exchange membrane (AEM) head groups, polymer structures and membrane synthesis methods. Limitations of current analytical techniques for characterizing AEMs are also discussed. AEM research is primarily driven by the need to develop suitable AEMs for the high-pH and high-temperature environments in anion exchange membrane fuel cells and anion exchange membrane water electrolysis applications. AEM head groups can be broadly classified as nitrogen based (e.g. quaternary ammonium), nitrogen free (e.g. phosphonium) and metal cations (e.g. ruthenium). Metal cation head groups show great promise for AEM due to their high stability and high valency. Through ''rational polymer architecture'', it is possible to synthesize AEMs with ion channels and improved chemical stability. Heterogeneous membranes using porous supports or inorganic nanoparticles show great promise due to the ability to tune membrane characteristics based on the ratio of polymer to porou2s support or nanoparticles. Future research should investigate consolidating advancements in AEM head groups with an optimized polymer structure in heterogeneous membranes to bring together the valuable characteristics gained from using head groups with improved chemical stability, with the benefits of a polymer structure with ion channels and improved membrane properties from using a porous support or nanoparticles. AbbreviationsAAEM Alkaline anion exchange membrane AEM Anion exchange membrane AEMFC Anion exchange membrane fuel cell AEMWE Anion exchange membrane water electrolysis CEM Cation exchange membrane DSC Differential scanning calorimetry IEC Ion exchange capacity (mmol/g) IEM Ion exchange membrane PEMFC Proton exchange membrane fuel cell

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Section: Advancements In Aem Preparation Methodsmentioning

confidence: 99%

Section: Advancements In Aem Preparation Methodsmentioning

confidence: 99%

Section: Advancements In Aem Preparation Methodsmentioning

confidence: 99%

Section: Advancements In Aem Preparation Methodsmentioning

confidence: 99%

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A review of the synthesis and characterization of anion exchange membranes

2018

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“…This section deals with composited AEMs prepared by blending with ionic liquid 200, nano‐metal‐oxide fillers 201–206, LDH 207 or multiwalled carbon nanotube 208, and sol‐gel methods 209–212, reinforced or pore‐filling AEMs 213–233 and IPN or s‐IPN 234–239.…”

Section: Aems For Aemfcsmentioning

confidence: 99%

Anion‐Exchange Membranes for Fuel Cells: Synthesis Strategies, Properties and Perspectives

et al. 2015

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This review focuses on various synthesis strategies of anion‐exchange membranes (AEMs) for fuel cells, diverse methodologies of AEM‐forming, together with relationship between structures and properties. AEMs are discussed from seven categories, including (1) AEMs derived from Nafion precursors with sulfonyl fluoride groups, which display excellent stability and well‐developed morphologies that similar to Nafion, but has potentially high costs. (2) AEMs prepared by grafting technologies, such as chemical grafting technique, ATRP technique, plasma grafting technique and radiation grafting technique. (3) AEMs based on functionalized commercial polymers, including PVA, SEBS, CPP, PEEK, PES, PEI, PPO, and so on. (4) AEMs prepared by newly‐synthesized polymers, in which the most interesting approach is to synthesize alkaline multi‐block copolymers with enough long hydrophilic/hydrophobic blocks. (5) AEMs containing heterogeneous composition, which mainly prepared by blending and sol‐gel methods, reinforced or pore‐filling AEMs and IPN or s‐IPN. (6) AEMs with functional groups different from quaternary ammonium, which includes the studies of new type of AEMs with highly chemical stability in alkaline solution. (7) Hybrid membranes combining AEM with PEM, in which new configuration results in different performances. At last, conclusions and perspectives for the future researches of AEMs are presented.

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Hybrid anion exchange membranes with self‐assembled ionic channels

Liang

et al. 2017

Adv Polym Technol

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A novel strategy for fabricating nanocomposite anion exchange membranes (AEM), which can construct self-assembled ionic channels via in situ Menshutkin reaction, is proposed. The TEM image of a nanocomposite AEM based on chloromethylated polysulfone (CMPSF) and functionalized polyhedral oligomeric silsesquioxane (POSS) confirms the existence of core-shell clusters. The ionic conductivity of these nanocomposite AEMs shows a notable increase when the content of functionalized POSS exceeds the percolation threshold. Furthermore, the optimized nanocomposite AEM has higher ionic conductivity than the control AEM with similar ion-exchange capacity due to the well-developed morphology. K E Y W O R D Sanion exchange membrane, ionic channel, Menshutkin reaction, self-assembly

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A highly durable cross-linked hydroxide ion conducting pore-filling membrane

Cited by 43 publications

References 20 publications

A review of the synthesis and characterization of anion exchange membranes

A review of the synthesis and characterization of anion exchange membranes

Anion‐Exchange Membranes for Fuel Cells: Synthesis Strategies, Properties and Perspectives

Hybrid anion exchange membranes with self‐assembled ionic channels

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