Studies of a high temperature proton exchange membrane based on incorporating an ionic liquid cation 1-butyl-3-methylimidazolium into a Nafion matrix

Yang, Jingshuai; Che, Quantong; Zhou, Lu; He, Ronghuan; Savinell, Robert F.

doi:10.1016/j.electacta.2011.04.112

Cited by 75 publications

(63 citation statements)

References 46 publications

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“…Comparing the IR spectra of F 6 PBI-R 3 membranes with that of F 6 PBI membrane, the band at around 3149 cm À1 , assigned to the stretching vibration of N-H groups in benzimidazole rings, became weaker; meanwhile, the absorption band at around 2875 cm À1 , assigned to the -CH 2 -groups in epoxide units of the cross-linker [24,32], became stronger as the increase in the crosslinking degree of the membranes. Moreover, the peak at 1104 cm À1 attributable to the stretching vibration of C-O groups appeared in the spectra of the cross-linked F 6 PBI membranes [38], which indicated the opening of the epoxide rings during the cross-linking reactions [31,33]. These results suggest the formation of cross-linked structure in the F 6 PBI-R 3 membrane as shown in Fig.…”

Section: Cross-linking Of F 6 Pbimentioning

confidence: 80%

Epoxides cross-linked hexafluoropropylidene polybenzimidazole membranes for application as high temperature proton exchange membranes

Yang

et al. 2015

Electrochimica Acta

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Section: Cross-linking Of F 6 Pbimentioning

confidence: 80%

Epoxides cross-linked hexafluoropropylidene polybenzimidazole membranes for application as high temperature proton exchange membranes

Yang

et al. 2015

Electrochimica Acta

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“…32 Nevertheless, these face major drawback of leaching out from the hybrid membranes when come in contact with water (produced at cathode) in the operation of fuel cells. To evaluate the leaching characteristics of the hybrid membranes, the leaching test was carried out.…”

Section: Resultsmentioning

confidence: 99%

Polymer Electrolytes: Ionic Liquid Modified Phenolphthalein Based Hybrid Multiblock Poly(Arylene Ether) Copolymers

Awasthi

Gaur

2017

J. Electrochem. Soc.

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A new class of phenolphthalein based poly (arylene ether) multiblock copolymers treated with ionic liquid were synthesized to cast proton conductive membranes. A nucleophilic condensation reaction of 4, 4'-bis (4-hydroxyphenyl) valeric acid based hydrophilic oligomer (M.Wt = 8 kDa) with a series of phenolphthalein based hydrophobic oligomers (M.Wt = 5, 8 and 10 kDa) was carried out to synthesize nano-phase separated multiblock copolymers. Characterization of the synthesized copolymers was carried out using FT-IR, 1 HNMR and gel permeation chromatographic techniques. The fabricated hybrid membranes obtained by the impregnation of ionic liquid (1-butyl-3-methyl-imidazolium tetrafluoroborate (I.L)) in the synthesized multiblock copolymers showed better thermal and oxidative stability. Highly interconnected ionic channels in the hybrid membrane led to improved water uptake and proton conductivity while maintaining the mechanical stability. The Atomic Force Microscopy (AFM) images and Scanning Electron Microscopy (SEM) images showed the hydrophobic-hydrophilic nano-phase separation in the pristine and hybrid multiblock membranes. The challenge of meeting the ever-growing world energy demand has led to the search of renewable power sources with zero-emissions. The recent success of fuel cell driven vehicles using proton exchange membrane fuel cell has encouraged the researchers to look for ways to improve upon the upcoming technology that may change the world. The proton exchange membrane fuel cell (PEMFC) is receiving a lot of attention due to its low operating temperature, high power density and low costs.1-3 The proton exchange membrane (PEMs) is the key component in a PEMFC. Nafion and comparable perfluorosulfonic acid-based membranes are currently the state-of-the-art PEMs, but these suffer from shortcomings such as high permeability, cost, and limited operating temperatures. The difficulty in their synthesis and their environmental incompatibility due to fluorine are other deterrent factors of Nafion membrane. The thermo-oxidative stability, durability and mechanical stability are the other important factors, which affects the PEMFC performance. To overcome these limitations, enormous research efforts are going on for the designing and synthesis of alternative hydrocarbon PEMs. The sulfonated poly (arylene ether) hydrocarbon is attracting widespread interests as PEMs due to its very high thermal and mechanical stability, and good fuel cell performance in the operating temperature conditions. In the last twothree decades, researchers have reported various approaches to prepare the sulfonated hydrocarbon PEMs. [4][5][6] The selection of monomer, direct sulfonation of monomer, post sulfonation of main polymer backbone, crosslinking, blending, grafting, and composites of PEMs have been reported in the literature. [7][8][9][10][11][12] The high proton conductivity of the PEMs can be achieved by increasing the degree of sulfonation, but this ultimately results into water soluble PEMs. Therefore, the other way to impro...

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“…Pure IL-OH shows two characteristic absorption bands at 3570 and 3420 cm -1 that arise from the free hydroxyls and the intermolecular hydrogen bonds, respectively [45]. The spectra of dry Nafion present absorption bands corresponding to free hydroxyls and hydrogen bonds as well [48], but the absorptions are much weaker than those of IL-OH. The FTIR spectra of nano-SiO 2 is composed of a weak and broad absorption peak centered at 3430 cm -1 , which can be ascribed to hydroxyl groups bonded on the silica surface [49].…”

Section: Hydrogen Bonding Interactions In the Nafion/il-oh/sio 2 Hybrmentioning

confidence: 95%

More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid

Shi

Mehio

et al. 2016

Applied Energy

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Xianbo (2016) More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nanosilica/hydroxyl ionic liquid. Applied Energy, 175 . pp. 451-458. ISSN 0306-2619Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/33649/1/applied%20energy%20revision%200307%20without %20highlight.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the Creative Commons Attribution Non-commercial No Derivatives licence and may be reused according to the conditions of the licence. For more details see: http://creativecommons.org/licenses/by-nc-nd/2.5/ A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.

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Studies of a high temperature proton exchange membrane based on incorporating an ionic liquid cation 1-butyl-3-methylimidazolium into a Nafion matrix

Cited by 75 publications

References 46 publications

Epoxides cross-linked hexafluoropropylidene polybenzimidazole membranes for application as high temperature proton exchange membranes

Epoxides cross-linked hexafluoropropylidene polybenzimidazole membranes for application as high temperature proton exchange membranes

Polymer Electrolytes: Ionic Liquid Modified Phenolphthalein Based Hybrid Multiblock Poly(Arylene Ether) Copolymers

More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid

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