Effect of end-group cross-linking on transport properties of sulfonated poly(phenylene sulfide nitrile)s for proton exchange membranes

Na, Kang; Lee, So Young; Shin, Dong Won; Hwang, Doo Sung; Lee, Kang Hyuck; Cho, Doo Hee; Kim, Ji Hoon; Lee, Young Moo

doi:10.1016/j.jpowsour.2016.01.051

Cited by 36 publications

(18 citation statements)

References 45 publications

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“…Proton conductivity, mechanical properties, and barrier properties are affected by amount of absorbed water [37]. Thus, study of long-term stability of membrane in hydrated state is crucial for DMFC application.…”

Section: Resultsmentioning

confidence: 99%

Performance of Void-Free Electrospun SPEEK/Cloisite as a Function of Degree of Dispersion State on Nanocomposite Proton Exchange Membrane for Direct Methanol Fuel Cell Application

et al. 2019

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One of the main problems in direct methanol fuel cell (DMFC) application is methanol crossover. In order to solve the problem, an exfoliated void-free electrospun Sulfonated Poly(Ether Ether Ketone) (SPEEK)/cloisite nanocomposite membrane was developed. The membrane was prepared by immersing electrospun SPEEK/cloisite fiber mats onto incomplete solidified SPEEK polymer matrix. A well dispersed and reduction size of cloisite particles that ranges from 0.29–0.39 µm was observed by using Scanning Electron Microscopy Analysis (SEM) and Atomic Force Microscope (AFM). The effect of the morphology of the composite membrane in terms of degree of dispersion state of the Cloisite on the membrane performance was discussed. SP/e-spunCL15 with fully exfoliated structure exhibited the highest performance as compared to other tested membranes and Nafion® 115 with current density of 1042.2 mAcm−2 and power density of 1.18 mWcm−2. Improved morphological, dimensional change properties, and performance assigned to well-dispersed cloisite15A induced by the electrospinning technique make the membranes more efficient for direct methanol fuel cell applications.

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Section: Resultsmentioning

confidence: 99%

Performance of Void-Free Electrospun SPEEK/Cloisite as a Function of Degree of Dispersion State on Nanocomposite Proton Exchange Membrane for Direct Methanol Fuel Cell Application

et al. 2019

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“…Volumetric IEC of dry membrane (IEC v(dry) ) and the volumetric IEC of wet membrane (IEC v(wet) ) was confirmed based on WU measurements according to the previous method by using the following Equation:

{IEC}_{normalv false(wet false)} = \frac{{IEC}_{normalv false(dry false)}}{1 + 0.01 WU} ×100%

…”

Section: Methodsmentioning

confidence: 97%

Multiblock poly(Phenylene ether nitrile)s with pendant sulfoalkoxyl side chain for H₂/air fuel cells at low humidity condition

Dong

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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A series of multiblock poly(phenylene ether nitrile)s with pendant sulfoalkoxyl side chains have been developed as proton exchange membranes for fuel cells. The membranes were obtained by a solution casting method and exhibited good thermal stability, flexibility, and mechanical strength. The membranes displayed well‐developed microphase separation, which largely contributed to their excellent ion conduction ability. One of the new membranes with a low ion exchange capacity of 1.57 mequiv g−1 showed higher proton conductivity than Nafion 212 over the entire RH range (30–95%). The maximum power output generated in a single cell test reached up to 0.754, 0.640, and 0.414 W cm−2 at 70 °C under 80%, 50%, and 30% RH conditions, respectively. The current density of the membrane obtained at 0.6 V (I0.6) was as high as 640 mA cm−2, which was much higher than that of Nafion 212 (375 mA cm−2 at 30% RH), suggesting its superiority for a more rapid system start‐up. Furthermore, the in situ durability test at 50% RH was performed at a constant current loading, and the membrane did not show any significant voltage reduction over the 400 h testing period. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1940–1948

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“…Recently, the cuprous ion catalyzed azide‐alkyne click polymerization (AACP) has been widely used in the polymer science due to its remarkable features, for example; simple reaction setup, high rate of reaction, tolerance to a wide range of functional groups and high product yields . Therefore, many researchers are focusing on AACP for the synthesis of linear polymers, hyperbranched polymers, graft polymers and crosslinking polymers . However, the AACP has not been much employed for the synthesis of the sulfonated polytriazoles .…”

Section: Introductionmentioning

confidence: 99%

Hydroquinone Based Sulfonated Copolytriazoles with Enhanced Proton Conductivity

Singh

Bisoi

Banerjee

et al. 2017

Macro Materials & Eng

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A series of new fluorinated sulfonated copolytriazoles (PTHQSH‐XX) with ion exchange capacity (IECw) values ranging from 1.66 to 2.82 meq g−1 are prepared via cuprous ion catalyzed azide‐alkyne click polymerization reaction between 1,4‐bis(prop‐2‐ynyloxy)benzene, 4,4′‐diazido‐2,2′‐stilbene disulfonic acid disodium salt (SA), and 4,4‐bis[3′‐trifluoromethyl‐4′(4‐azidobenzoxy) benzyl] biphenyl (QAZ). The degree of sulfonation of the copolytriazoles is adjusted between 60% and 90% by varying the molar ratio of sulfonated monomer (SA) to the nonsulfonated monomer (QAZ). The structure of the copolytriazoles is characterized by Fourier transform infrared and NMR spectroscopy. The solution‐cast membranes of these copolymers exhibit high thermal, mechanical, oxidative and hydrolytic stability, and high proton conductivity (19–142 mS cm−1 at 80 °C and 22–157 mS cm−1 at 90 °C). Transmission electron microscopy confirms the formation of good phase separated morphology with ionic clusters in the range of 15–145 nm.

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Effect of end-group cross-linking on transport properties of sulfonated poly(phenylene sulfide nitrile)s for proton exchange membranes

Cited by 36 publications

References 45 publications

Performance of Void-Free Electrospun SPEEK/Cloisite as a Function of Degree of Dispersion State on Nanocomposite Proton Exchange Membrane for Direct Methanol Fuel Cell Application

Performance of Void-Free Electrospun SPEEK/Cloisite as a Function of Degree of Dispersion State on Nanocomposite Proton Exchange Membrane for Direct Methanol Fuel Cell Application

Multiblock poly(Phenylene ether nitrile)s with pendant sulfoalkoxyl side chain for H₂/air fuel cells at low humidity condition

Hydroquinone Based Sulfonated Copolytriazoles with Enhanced Proton Conductivity

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Effect of end-group cross-linking on transport properties of sulfonated poly(phenylene sulfide nitrile)s for proton exchange membranes

Cited by 36 publications

References 45 publications

Performance of Void-Free Electrospun SPEEK/Cloisite as a Function of Degree of Dispersion State on Nanocomposite Proton Exchange Membrane for Direct Methanol Fuel Cell Application

Performance of Void-Free Electrospun SPEEK/Cloisite as a Function of Degree of Dispersion State on Nanocomposite Proton Exchange Membrane for Direct Methanol Fuel Cell Application

Multiblock poly(Phenylene ether nitrile)s with pendant sulfoalkoxyl side chain for H2/air fuel cells at low humidity condition

Hydroquinone Based Sulfonated Copolytriazoles with Enhanced Proton Conductivity

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Multiblock poly(Phenylene ether nitrile)s with pendant sulfoalkoxyl side chain for H₂/air fuel cells at low humidity condition