Proton exchange membranes with microphase separated structure from dual electrospun poly(ether ketone) mats: Producing ionic paths in a hydrophobic matrix

Oroujzadeh, Maryam; Mehdipour‐Ataei, Shahram; Esfandeh, Masoud

doi:10.1016/j.cej.2015.01.088

Cited by 22 publications

(11 citation statements)

References 24 publications

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“…As mentioned in the previous section, composite membranes elaborated by simultaneous electrospinning of both charged and inert polymers is another interesting approach ( Figure 9) [84][85][86]122,123]. Dual nanofibre mats of Nafion ® and polyphenylsulfone (PPSU) were fabricated and two types of composite membranes were obtained using different postelectrospinning treatments (Figure 8): 1) PPSU nanofibres dispersed in Nafion ® matrix obtained by thermally annealing the Nafion ® part of the dual mat, which then flows into the PPSU interfibre void space without destroying the PPSU fibre structure; 2) Nafion ® nanofibres dispersed in PPSU matrix by exposing the PPSU part of the dual mat to chloroform vapour followed by thermal annealing resulting in filling of empty space between Nafion ® nanofibres without harming the Nafion ® fibre structure [84].…”

Section: Composite Membranes Comprising An Uncharged Polymer and An Ementioning

confidence: 99%

Electrospun nanofibre composite polymer electrolyte fuel cell and electrolysis membranes

et al. 2016

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International audienceLarge-scale commercialisation of Proton Exchange Membrane Fuel Cell (PEMFC) technology for automotive and stationary applications demands the development of a robust, durable and cost-effective materials. In this regard, ionomer membranes being present at the core of PEMFCs are required to maintain elevated proton conductivity, high mechanical strength and low gas permeability during the lifespan of the fuel cell. These challenges are addressed by investigating novel nano-structured membrane materials possessing long-range spatial organisation of ionic and hydrophobic domains at the micro-and nano-scales. Electrospinning, a versatile and easily up-scalable tool for the preparation of nanofibrous polymers and ceramics with targeted architectures, is being extensively applied for the development of nanostructured electrolyte membranes. This review describes the most important advances in the use of electrospun materials for the preparation of new generation fuel cell proton conducting membranes. It also highlights the challenges to be overcome and the new directions and future application fields of composite nanofibre-based membranes in the broader context of energy materials

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Section: Composite Membranes Comprising An Uncharged Polymer and An Ementioning

confidence: 99%

Electrospun nanofibre composite polymer electrolyte fuel cell and electrolysis membranes

et al. 2016

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“…Proton transfer in most of the membranes depends on humidity, while at temperatures higher than 120 °C, the moisture content of membrane is reduced and reached zero approximately. Many attempts have been done to overcome the difficulties . Development of membranes with a low humidity dependence could improve the performance of membranes at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

A new sulfonated poly(ether sulfone) hybrid with low humidity dependence for high‐temperature proton exchange membrane fuel cell applications

Molavian

Abdolmaleki

Tadavani

et al. 2017

J of Applied Polymer Sci

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A new sulfonated poly(ether sulfone) (PES) hybrid with low humidity dependence was prepared based on a new synthesized PES and Udel as a commercial PES. The PES was synthesized based on a pyridine containing diol which is able to change between pyridine and pyridinium salt forms during the cell performance (acidic condition) and facilitate proton transfer. The presence of nitrogen group increases inter and intramolecular interactions in the membrane and enhance proton hopping mechanism. Thermogravimetrical analysis of PES hybrid shows good thermal stability. Proton conductivity measurements were evaluated on a fuel cell test station, showing that the membrane has better performance under lower humidity (relative humidity 5 60%) compare to the fully hydrated condition (relative humidity 5 100%). The results reveal that proton transfer might be mainly accomplished through proton hopping mechanism at higher temperatures. The membrane also shows significant proton conductivity at 120 8C (about 6.6 mS cm 21 at RH 5 30%).

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“…Fundamental studies on the Nafion molecular structure show that important superior features of this material in respect to other choices are (i) good hydrophilic–hydrophobic phase separation, and (ii) suitable ratio, size, and interconnection between hydrophilic–hydrophobic phases, making nice balance of proton conductivity and water dimensional swelling . However, most random SPAES membranes have lack of suitable phase‐separated microstructures because of their rigid molecular chains and weak hydrophilic–hydrophobic nature . One successful strategy to improve the properties of these copolymers can be distinct separation of the hydrophilic segment from the hydrophobic segment of polymer main chain …”

Section: Introductionmentioning

confidence: 99%

“…However, most random SPAES membranes have lack of suitable phase‐separated microstructures because of their rigid molecular chains and weak hydrophilic–hydrophobic nature . One successful strategy to improve the properties of these copolymers can be distinct separation of the hydrophilic segment from the hydrophobic segment of polymer main chain …”

Section: Introductionmentioning

confidence: 99%

Mechanical and morphological studies of sulfonated poly(arylene ether sulfone)s for potential application in fuel cell membrane

Pirali-Hamedani

Mehdipour‐Ataei

2017

Polymers for Advanced Techs

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Two groups of synthesized sulfonated poly(ether sulfone)s with similar structures but different size of repeat units were selected. Investigation of the properties of these copolymers with different sulfonation contents for application as fuel cell membrane was the main aim of this study. These groups of copolymers showed different thermal behavior, mechanical properties, dimensional and oxidative stability, ion exchange capacity, water uptake, and proton conductivity. Structure–property relation was surveyed, and the copolymers showed acceptable results for use as fuel cell membrane. The swelling ratio of the copolymers was in the range of 3.3–6.6%, and the proton conductivity of them was about 0.020–0.077 S/cm at 25°C. These data were comparable with Nafion 115 with 8.15% of swelling ratio and 0.085 S/cm of proton conductivity. Copyright © 2017 John Wiley & Sons, Ltd.

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Proton exchange membranes with microphase separated structure from dual electrospun poly(ether ketone) mats: Producing ionic paths in a hydrophobic matrix

Cited by 22 publications

References 24 publications

Electrospun nanofibre composite polymer electrolyte fuel cell and electrolysis membranes

Electrospun nanofibre composite polymer electrolyte fuel cell and electrolysis membranes

A new sulfonated poly(ether sulfone) hybrid with low humidity dependence for high‐temperature proton exchange membrane fuel cell applications

Mechanical and morphological studies of sulfonated poly(arylene ether sulfone)s for potential application in fuel cell membrane

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