Characteristics of Polyethersulfone/Sulfonated Polyimide Blend Membrane for Proton Exchange Membrane Fuel Cell

Wang, L.; Yi, Baolian; Zhang, H. M.; Xing, Deke

doi:10.1021/jp710704v

Cited by 50 publications

(22 citation statements)

References 22 publications

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“…A variety of different blended polymer pairs chosen to introduce specific interactions have been considered as PEM candidates for fuel cells application [113][114][115][116][117]. Such interactions are reported to improve compatibility in 'two blend' polymers and also reduce methanol cross over in DMFCs.…”

Section: Blend Polyelectrolyte Complex Membranesmentioning

confidence: 99%

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

2012

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Abstract:The relentless increase in the demand for useable power from energy-hungry economies continues to drive energy-material related research. Fuel cells, as a future potential power source that provide clean-at-the-point-of-use power offer many advantages such as high efficiency, high energy density, quiet operation, and environmental friendliness. Critical to the operation of the fuel cell is the proton exchange membrane (polymer electrolyte membrane) responsible for internal proton transport from the anode to the cathode. PEMs have the following requirements: high protonic conductivity, low electronic conductivity, impermeability to fuel gas or liquid, good mechanical toughness in both the dry and hydrated states, and high oxidative and hydrolytic stability in the actual fuel cell environment. Water soluble polymers represent an immensely diverse class of polymers. In this comprehensive review the initial focus is on those members of this group that have attracted publication interest, principally: chitosan, poly (ethylene glycol), poly (vinyl alcohol), poly (vinylpyrrolidone), poly (2-acrylamido-2-methyl-1-propanesulfonic acid) and poly (styrene sulfonic acid). The paper then considers in detail the relationship of structure to functionality in the context of polymer blends and polymer based networks together with the effects of membrane crosslinking on IPN and semi IPN architectures. This is followed by a review of pore-filling and other impregnation approaches. Throughout the paper detailed numerical results are given for comparison to today's state-of-the-art Nafion ® based materials.

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Section: Blend Polyelectrolyte Complex Membranesmentioning

confidence: 99%

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

2012

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“…Despite these potential advantages, however, their application in fuel cell membranes is hampered by their instability toward hydrolysis and heat. Introducing flexible linkages, separating the sulfonic acid group from the diamine parts, and using aliphatic diamines could improve the stability of these materials, but research on more stable membranes would remain highly desirable [34].…”

Section: Introductionmentioning

confidence: 99%

Partially Fluorinated Sulfonated Poly(ether amide) Fuel Cell Membranes: Influence of Chemical Structure on Membrane Properties

2011

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A series of fluorinated sulfonated poly (ether amide)s (SPAs) were synthesized for proton exchange membrane fuel cell applications. A polycondensation reaction of 4,4'-oxydianiline, 2-sulfoterephthalic acid monosodium salt, and tetrafluorophenylene dicarboxylic acids (terephthalic and isophthalic) or fluoroaliphatic dicarboxylic acids produced SPAs with sulfonation degrees of 80-90%. Controlling the feed ratio of the sulfonated and unsulfonated dicarboxylic acid monomers afforded random SPAs with ion exchange capacities between 1.7 and 2.2 meq/g and good solubility in polar aprotic solvents. Their structures were characterized using NMR and FT IR spectroscopies. Tough, flexible, and transparent films were obtained with dimethylsulfoxide using a solution casting method. Most SPA membranes with 90% sulfonation degree showed high proton conductivity (>100 mS/cm) at 80 °C and 100% relative humidity. Among them, two outstanding ionomers (ODA-STA-TPA-90 and ODA-STA-IPA-90) showed proton conductivity comparable to that of Nafion 117 between 40 and 80 °C. The influence of chemical structure on the membrane properties was systematically investigated by comparing the fluorinated polymers to their hydrogenated counterparts. The results suggest that the incorporation of fluorinated moieties in the polymer backbone of the membrane reduces water absorption. High molecular weight and the resulting physical entanglement of the polymers chains played a more important role in improving stability in water, however. OPEN ACCESSPolymers 2011, 3 223

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“…Kallitsis et al 29 investigated polybenzimidazole/sulfonated polysulfone blend membranes, and the miscible structure was proven. Yi et al 30 reported a blend membrane prepared from nonsulfonated polyether DOI 10.1007/s13233-012-0018-1 *Corresponding Author. E-mail: ythong@krict.re.kr sulfone and SPI, and the stability of the SPI was greatly improved.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of acid-acid blend membranes for direct methanol fuel cell applications

Park

et al. 2011

Macromol. Res.

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Acid-acid blend membranes were successfully prepared using two types of sulfonated poly(arylene ether sulfone) random copolymers with various ratios (SPAES-BP and SPAES-HPF). The blend membrane properties were investigated using proton nuclear magnetic resonance, thermogravimetric analysis, water uptake, methanol permeability, and proton conductivity measurements. The morphology of the blend membranes varied according to the SPAES-HPF ratio in the blending solution and the nanosized dispersion of the SPAES-HPF in the SPEAS-BP affected the improvement of acid-acid blend membrane properties. Consequentially, the water uptake and dimensional change decreased while the proton conductivity increased in the blend membranes involving a small amount SPAES-HPF compared with that of the SPAES-BP. For the direct methanol fuel cell performance, the power density of SPAES-BP(90)/SPAES-HPF(10) showed an enhancement of 145 mW/cm 2 over that of Nafion 115 (132 mW/cm 2 ).

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Characteristics of Polyethersulfone/Sulfonated Polyimide Blend Membrane for Proton Exchange Membrane Fuel Cell

Cited by 50 publications

References 22 publications

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

Partially Fluorinated Sulfonated Poly(ether amide) Fuel Cell Membranes: Influence of Chemical Structure on Membrane Properties

Preparation and characterization of acid-acid blend membranes for direct methanol fuel cell applications

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