Composite membranes based on sulfonated poly(aryl ether ketone)s containing the hexafluoroisopropylidene diphenyl moiety and poly(amic acid) for proton exchange membrane fuel cell application

Li, Ye; Li, Zhiliang; Lu, Xiaofeng; Zhang, Chengcheng; Wang, Zhaojie; Kong, Lirong; Xin-cai, Liu

doi:10.1016/j.ijhydene.2011.08.045

Cited by 19 publications

(8 citation statements)

References 32 publications

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“…The authors attributed that lower water uptake value to the possible interactions between the sulfonic acid groups and PWA, which reduced the available water absorption sites. However, the IEC value of the composite membranes was found to increase in the range of 1.46-1.58 mequiv/g, with an increase in PWA content 1-11 [76] 1-12 [78] Scheme 10 (A) Combination of sulfonated poly(aryl ether ketone) with polyamic acid (PAA) containing oligoaniline. (B) Structure of the sulfonated poly(arylene biphenylsulfone ketone) block copolymer.…”

Section: Sulfonated Fluorinated Branched Poly(arylene Ether)smentioning

confidence: 99%

Sulfonated fluorinated-aromatic polymers as proton exchange membranes

Ghosh¹,

Banerjee

2014

E-Polymers

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Abstract:In recent years, extensive research on the preparation and properties of proton exchange membranes (PEMs) has been realized. This article focusses on the recent studies on new PEM materials based on aromatic hydrocarbon polymers with sulfonated groups as hydrophilic domains and fluorinated groups as hydrophobic domains as alternatives to conventional perfluorinated polymers. It is necessary to improve the proton conductivity especially under low-humidity conditions and at high operating temperatures to break through the current aromatic PEM system. Hence, there is a need to develop new high-conductivity fuel cell ionomers with improved thermal, chemical, and electrochemical stability by designing a suitable polymer structure for PEM application.

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Section: Sulfonated Fluorinated Branched Poly(arylene Ether)smentioning

confidence: 99%

Sulfonated fluorinated-aromatic polymers as proton exchange membranes

Ghosh¹,

Banerjee

2014

E-Polymers

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“…Basic polymers are always blended with sulfonated polymers to form acid-base composite membranes, such as poly(ether imide), poly(amide imide), polyaniline, and polypyrrole. [24][25][26] Due to the intermolecular ionic cross-linked structure, these membranes present reduced water uptake and methanol permeability. However, it is hard to get a homogeneous membrane due to the poor compatibility of different polymers.…”

Section: Introductionmentioning

confidence: 99%

Chemically stable thioether cross-linked membranes derived from sulfonated poly(arylene ether ketone)s for direct methanol fuel cells

Yang

Wei

et al. 2017

High Performance Polymers

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A series of thioether cross-linked membranes based on sulfonated poly(arylene ether ketone)s containing propenyl groups were prepared to solve the problem of high methanol permeability for proton electrolyte membrane in direct methanol fuel cells (DMFCs). For this purpose, 4,4′-thiobisbenzenethiol was selected as cross-linker, and the cross-linked structure was formed via thiol-ene click chemical reaction between propenyl and thiol groups. Compared with pristine membrane, the thioether cross-linked membranes exhibited improved mechanical properties and dimensional stabilities. As the cross-linker increased, the swelling ratio decreased from 11.01% to 8.64% at 20°C and from 15.18% to 10.69% at 80°C. Furthermore, the modified membranes exhibited reduced methanol permeability coefficients (down to 4.03 × 10−7 cm2 s−1), which was nearly half of the pristine membrane (7.66 × 10−7 cm2 s−1). Due to the thioether units, the cross-linked membranes showed enhanced oxidative stabilities, and the longest elapsed time in Fenton’s reagent was 225 min, which was 2.5 times longer than that of pristine polymeric membrane. Although the proton conductivity decreased upon the addition of cross-linker agent, the selectivity value increased due to the lower methanol permeability. Thus, all the results implied that the thioether cross-linked membranes were promising alternative materials for DMFCs application.

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“…6,7 Considerable studies have been reported to attempt to prepare new polymers as Nafion alternatives. In general, acid-functionalized aryl type hydrocarbon polymers such as sulphonated polyimides, 8,9 sulphonated poly(ether ether ketone)s (SPEEK), 10,11 sulphonated poly(arylene ether sulphone)s 12,13 and acid-doped poly(benzimidazole)s 14,15 have been studied for PEMs due to their remarkable mechanical, thermal and chemical stabilities. Generally, PEMs based on sulphonated polymers usually exhibit high proton conductivity only at a high sulphonation degree (SD) level.…”

Section: Introductionmentioning

confidence: 99%

Silane cross-linked proton electrolyte membranes based on branched sulphonated poly(ether ether ketone)s with high sulphonation degree for direct methanol fuel cells

Wang

Xie

et al. 2014

High Performance Polymers

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In this study, the silane cross-linked membranes based on branched sulphonated poly(ether ether ketone)s (BSPEEK) with a high sulphonation degree of 1.2 have been successfully prepared for direct methanol fuel cells. 3-Mercaptopropyltrimethoxysilane (MPTMS) was grafted onto the BSPEEK backbone via the thiol-ene click reaction between propenyl and thiol groups. The expected silane cross-linked structure within the membrane was confirmed by Fourier transform infrared spectroscopy and solubility test. The silane cross-linked membranes displayed excellent chemical stability and improved mechanical property. Furthermore, the water uptake and methanol permeability of the membranes decreased with the increasing proportion of MPTMS. The dense membrane structure formed by Si-O-Si cross-linking made a great contribution to the improvement of the membrane's properties. Therefore, the as-prepared membranes may be potential proton electrolyte membrane for fuel cells.

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Composite membranes based on sulfonated poly(aryl ether ketone)s containing the hexafluoroisopropylidene diphenyl moiety and poly(amic acid) for proton exchange membrane fuel cell application

Cited by 19 publications

References 32 publications

Sulfonated fluorinated-aromatic polymers as proton exchange membranes

Sulfonated fluorinated-aromatic polymers as proton exchange membranes

Chemically stable thioether cross-linked membranes derived from sulfonated poly(arylene ether ketone)s for direct methanol fuel cells

Silane cross-linked proton electrolyte membranes based on branched sulphonated poly(ether ether ketone)s with high sulphonation degree for direct methanol fuel cells

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