Sulfonated poly(ether ether ketone) membranes crosslinked with sulfonic acid containing benzoxazine monomer as proton exchange membranes

Ye, Yunsheng; Yen, Ying‐Chieh; Cheng, Chih‐Chia; Chen, Wen Yi; Tsai, Li Duan; Chang, Feng‐Chih

doi:10.1016/j.polymer.2009.04.072

Cited by 57 publications

(44 citation statements)

References 52 publications

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“…The numerous crosslinked membranes that have been designed with a view to meeting these requirements include common chemical networks (a polymer comprising only one network without a linear polymer entrapped within the network polymer) [121][122][123][124], interpenetrating polymer networks (IPNs) [68,125] and semi-IPNs [126][127][128]: an illustrated common polymer network and the associated IUPAC polymer network definition are shown in Figure 6 [129]. A possible drawback to the use of cross-linked polymers is that the crosslinking might hinder the mobility of ions and hence lower the final conductivity.…”

Section: Polymer Network Architectures As Proton Exchange 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: Polymer Network Architectures As Proton Exchange Membranesmentioning

confidence: 99%

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

2012

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“…They employed the equation: (2) where T g1 and T g12 are the glass transition temperatures of the pure polymer and the polymer/salt blend, respectively, and Φ i and r i are the volume fraction and the degree of polymerization for component i, respectively (r 2 = 1). The value of β is determined using the equation:…”

Section: Thermal Analysesmentioning

confidence: 99%

“…Polymer electrolytes, which have many potential applications in, for example, high-energy-density batteries and fuel cells, have been studied extensively during the past three decades [1][2][3][4]. Solid polymer electrolytes (SPEs), which are complexes of polymers and metal salts, can be prepared by dissolving salts in polar polymer hosts; they can then be applied in large-scale batteries [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Supramolecular Functionalities Influence the Thermal Properties, Interactions and Conductivity Behavior of Poly(ethylene glycol)/LiAsF6 Blends

et al. 2013

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Abstract:In this study, we tethered terminal uracil groups onto short-chain poly(ethylene glycol) (PEG) to form the polymers, uracil (U)-PEG and U-PEG-U. Through AC impedance measurements, we found that the conductivities of these polymers increased upon increasing the content of the lithium salt, LiAsF 6 , until the Li-to-PEG ratio reached 1:4, with the conductivities of the LiAsF 6 /U-PEG blends being greater than those of the LiAsF 6 /U-PEG-U blends. The ionic conductivity of the LiAsF 6 /U-PEG system reached as high as 7.81 × 10 −4 S/cm at 30 °C. Differential scanning calorimetry, wide-angle X-ray scattering, 7 Li nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy revealed that the presence of the uracil groups in the solid state electrolytes had a critical role in tuning the glass transition temperatures and facilitating the transfer of Li + ions.

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“…Therefore, much research is currently being directed towards obtaining membranes that overcome these problems, such as synthesizing perfl uorinated membranes modifi ed with polyimides, [5][6][7][8] polybenzimidazoles, [9][10][11] poly(vinyl alcohol), [12][13][14] and poly(ether ether ketone). [15][16][17][18] In general, aromatic PEMs only reach suitable proton conductivities with high degrees of sulfonation. However, high sulfonation levels can lead to swelling and consequent dissolution.…”

Section: Introductionmentioning

confidence: 99%

Sulfonated Polyimide Proton Exchange Membranes with Graphene Oxide show Improved Proton Conductivity, Methanol Crossover Impedance, and Mechanical Properties

Tseng

Cheng

et al. 2011

Advanced Energy Materials

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Graphene oxide has been utilized to enhance the proton conductivity and mechanical properties and reduce the methanol permeability of polymer exchange membranes. The membranes exhibit dramatic improvements in proton conductivity (490.3%), methanol permeability (a 508.9% decrease in methanol permeability and a near 25‐fold increase in selectivity of proton conductivity to methanol permeability were achieved at 80 °C) and the mechanical properties (134.4% enhancements in tensile strength at 30 °C) with SPI/GO_0.5 wt%.

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Sulfonated poly(ether ether ketone) membranes crosslinked with sulfonic acid containing benzoxazine monomer as proton exchange membranes

Cited by 57 publications

References 52 publications

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

Supramolecular Functionalities Influence the Thermal Properties, Interactions and Conductivity Behavior of Poly(ethylene glycol)/LiAsF6 Blends

Sulfonated Polyimide Proton Exchange Membranes with Graphene Oxide show Improved Proton Conductivity, Methanol Crossover Impedance, and Mechanical Properties

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