Modified sulfonated Poly(arylene ether) multiblock copolymers containing highly sulfonated blocks for polymer electrolyte membrane fuel cells

yoo, tae-hyun; Aziz, Md. Abdul; Oh, Kwangjin; Shanmugam, Sangaraju

doi:10.1016/j.memsci.2017.08.008

Cited by 37 publications

(22 citation statements)

References 37 publications

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“…Figure 6 A shows the experimental ionic conductivity measured for the three SPES membranes (see data in Table 2 ). The data reported in different literature sources for Nafion 212 at 80 °C are also included for comparison purposes [ 21 , 69 , 70 , 71 ]. Nafion 212 has a similar thickness to Nafion 112 and SPES membranes (

), although the cell performance of Nafion 212 is somewhat better [ 72 ].…”

Section: Resultsmentioning

confidence: 99%

“…One of the blocks is sulfonated to facilitate ionic conduction, while the other block remains unaltered to provide mechanical stability. Relevant works published on copolymer-based PEMs were presented by Yoo et al [ 21 ], Jung et al [ 22 ], and Bae et al [ 23 ]. Yoo et al [ 21 ] synthesized poly(arylene ether) (PAE) multiblock copolymers with densely sulfonated hydrophilic blocks and well-separated phase morphology.…”

Section: Introductionmentioning

confidence: 99%

“…Relevant works published on copolymer-based PEMs were presented by Yoo et al [ 21 ], Jung et al [ 22 ], and Bae et al [ 23 ]. Yoo et al [ 21 ] synthesized poly(arylene ether) (PAE) multiblock copolymers with densely sulfonated hydrophilic blocks and well-separated phase morphology. As a result, high proton conductivity (15 mS cm −1 ) at 80 °C and moderate RH (50%), comparable to Nafion 212 (25 mS cm −1 ) was achieved.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the Conductivity of Proton-Exchange Membranes Based on Multiblock Copolymers of Sulfonated Polysulfone and Polyphenylsulfone: An Experimental and Modeling Study

et al. 2021

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The effect of relative humidity (RH) and degree of sulfonation (DS) on the ionic conductivity and water uptake of proton-exchange membranes based on sulfonated multiblock copolymers composed of polysulfone (PSU) and polyphenylsulfone (PPSU) is examined experimentally and numerically. Three membranes with a different DS and ion-exchange capacity are analyzed. The heterogeneous structure of the membranes shows a random distribution of sulfonated (hydrophilic) and non-sulfonated (hydrophobic) domains, whose proton conductivity is modeled based on percolation theory. The mesoscopic model solves simplified Nernst–Planck and charge conservation equations on a random cubic network. Good agreement is found between the measured ionic conductivity and water uptake and the model predictions. The ionic conductivity increases with RH due to both the growth of the hydrated volume available for conduction and the decrease of the tortuosity of ionic transport pathways. Moreover, the results show that the ionic conductivity increases nonlinearly with DS, experiencing a strong rise when the DS is varied from 0.45 to 0.70, even though the water uptake of the membranes remains nearly the same. In contrast, the increase of the ionic conductivity between DS=0.70 and DS=0.79 is significantly lower, but the water uptake increases sharply. This is explained by the lack of microphase separation of both copolymer blocks when the DS is exceedingly high. Encouragingly, the copolymer membranes demonstrate a similar performance to Nafion under well hydrated conditions, which can be further optimized by a combination of numerical modeling and experimental characterization to develop new-generation membranes with better properties.

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), although the cell performance of Nafion 212 is somewhat better [ 72 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the Conductivity of Proton-Exchange Membranes Based on Multiblock Copolymers of Sulfonated Polysulfone and Polyphenylsulfone: An Experimental and Modeling Study

et al. 2021

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“…The GPC data of hydrophilic precursors and hydrophobic oligomers exhibited a low PDI value in the range from 1.6 to 2.3, suggesting that no unfavorable polymer side reactions occurred during the polymerization reaction. The repeat unit of the PAS hydrophilic precursor and PAE hydrophobic oligomers was calculated from GPC data [37] and is shown in Table 1.…”

Section: Resultsmentioning

confidence: 99%

Improved Physicochemical Stability and High Ion Transportation of Poly(Arylene Ether Sulfone) Blocks Containing a Fluorinated Hydrophobic Part for Anion Exchange Membrane Applications

et al. 2018

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A series of anion exchange membranes composed of partially fluorinated poly(arylene ether sulfone)s (PAESs) multiblock copolymers bearing quaternary ammonium groups were synthesized with controlled lengths of the hydrophilic precursor and hydrophobic oligomer via direct polycondensation. The chloromethylation and quaternization proceeded well by optimizing the reaction conditions to improve hydroxide conductivity and physical stability, and the fabricated membranes were very flexible and transparent. Atomic force microscope images of quaternized PAES (QN-PAES) membranes showed excellent hydrophilic/hydrophobic phase separation and distinct ion transition channels. An extended architecture of phase separation was observed by increasing the hydrophilic oligomer length, which resulted in significant improvements in the water uptake, ion exchange capacity, and hydroxide conductivity. Furthermore, the open circuit voltage (OCV) of QN-PAES X10Y23 and X10Y13 was found to be above 0.9 V, and the maximum power density of QN-PAES X10Y13 was 131.7 mW cm−2 at 60 °C under 100% RH.

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“…However, other type of membranes based on sulfonated hydrocarbon polymers have also been studied for the same purpose (Figure B). In particular, sulfonated hydrocarbon PEMs can be classified according to their backbone structures as sulfonated polystyrene copolymers (SPSs), sulfonated polyimides (SPIs), sulfonated poly(phenylene)s, sulfonated poly(arylene)‐type polymers, or sulfonated poly(phosphazene)s (SPPhs) . The major advantage of these hydrocarbon‐type PEMs is that it is possible to design tailored polymer structures with desired properties using different type of monomers.…”

Section: Introductionmentioning

confidence: 99%

Proton Conductivity of Composite Polyelectrolyte Membranes with Metal‐Organic Frameworks for Fuel Cell Applications

Escorihuela

Narducci

Compañ

et al. 2018

Adv Materials Inter

156

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The study of proton conductivity processes has gained intensive attention in the past decades due to their potential applications in chemical sensors, electrochemical devices, and energy generation. The scientific community has focused its efforts on the development of high‐performing polymeric membranes as proton exchange membranes (PEMs) for fuel cell (FC) applications. In particular, high conductivity at different humidity and temperature and enhanced chemical and mechanical stability under operative conditions are considered the main goals to be reached. The design of mixed‐matrix membranes (MMMs) based on conductive polymers and inorganic fillers is an approach commonly used for achieving materials with improved conductive and mechanical properties. In the last five years, the use of metal‐organic frameworks (MOFs) as fillers for conductive MMMs has rapidly grown for their intrinsic stability and structural versatility. The recent progress around the proton conductivity of MOF based composite membranes on PEMs for FC applications is critically reviewed.

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Modified sulfonated Poly(arylene ether) multiblock copolymers containing highly sulfonated blocks for polymer electrolyte membrane fuel cells

Cited by 37 publications

References 37 publications

On the Conductivity of Proton-Exchange Membranes Based on Multiblock Copolymers of Sulfonated Polysulfone and Polyphenylsulfone: An Experimental and Modeling Study

On the Conductivity of Proton-Exchange Membranes Based on Multiblock Copolymers of Sulfonated Polysulfone and Polyphenylsulfone: An Experimental and Modeling Study

Improved Physicochemical Stability and High Ion Transportation of Poly(Arylene Ether Sulfone) Blocks Containing a Fluorinated Hydrophobic Part for Anion Exchange Membrane Applications

Proton Conductivity of Composite Polyelectrolyte Membranes with Metal‐Organic Frameworks for Fuel Cell Applications

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