Preparation and evaluation of sulfonated polyoxadiazole membrane containing phenol moiety for PEMFC application

Abdolmaleki, Amir; Zhiani, Mohammad; Maleki, Majid; Borandeh, Sedigheh; Tadavani, Koorosh Firouz

doi:10.1016/j.polymer.2015.08.021

Cited by 19 publications

(16 citation statements)

References 61 publications

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“…In the ATR-FTIR spectrum (Figure 1a) of the es-Li-SPEOD, the peaks at 1604 and 1089 cm −1 belong to the C=N and =C−O−C= stretching vibrations of oxadiazole rings. 20,23,31 The peaks at 1397, 1031, and 736 cm −1 are assigned to the SO 2 and SO stretches of the −SO 3 Li groups. 23,32 The SO 2 stretch of the −SO 3 Li groups and phenoxathiine rings and the C−O−C stretch of the diphenyl ether groups give rise to a strong absorption band in the range of 1343∼1131 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries

Wang

Luo

et al. 2021

ACS Appl. Energy Mater.

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Traditional polyolefin separators used in lithium-ion batteries (LIBs) are seriously limited by the issues of inferior security and poor electrolyte wettability. Most of the very promising candidate separators based on heat-resistant polymers are, however, inherently difficult to process. Herein, a unique sulfonated aromatic heterocyclic polymer, lithiated poly(diphenyl ether oxadiazole) sulfonate (Li-SPEOD), was synthesized through a simple one-pot method and further electrospun to act as a novel separator (es-Li-SPEOD) for LIBs. The prepared Li-SPEOD possesses a high degree of sulfonation with a high molecular weight (M w = 4.31 × 10 5 ). The es-Li-SPEOD separator exhibits excellent mechanical and fire-resistance properties and is able to maintain dimensional stability at a temperature of even up to 400 °C in air. The ionic conductivity (3.57 mS cm −1 ) and lithium-ion transference number (0.37) of the es-Li-SPEOD with an electrochemical stability window of 4.5 V vs Li + /Li can be improved by 382.4 and 32.1%, respectively, compared to those of Celgard-2500 in the LiPF 6 electrolyte. The enhanced rate capability and cycle performance of the LiFePO 4 −Li half-cell are therefore obtained. Moreover, the es-Li-SPEOD displays an outstanding dendrite-suppressing effect for the lithium metal anode. This research proves that the Li-SPEOD-based separator has a broad application perspective in next-generation lithium batteries.

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Section: Resultsmentioning

confidence: 99%

Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries

Wang

Luo

et al. 2021

ACS Appl. Energy Mater.

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“…38 High proton conductivity obtained by SPPEO might be owing to their chemical structures, possessing both acceptor sites (nitrogen and oxygen of oxadiazole rings) and proton donor (SO 3 H) that were able to transport protons by proton hopping through the N and O sites and the sulfonic acid groups. 26 Unfortunately, the proton conductivities of SPPEO membranes were still lower than those of Nafion 117. This might because that Nafion 117 had unique ion-rich channels that were favored for proton transportation, while the SPPEO membranes synthesized in this article had a rather homogeneous structure.…”

Section: Resultsmentioning

confidence: 99%

“…A water molecule also donated a hydrogen bond to the oxygen of sulfonic acid. 26 Proton hops from a sulfonic acid group to the acceptor of oxadiazole group and then to another sulfonic acid group. Thus, a favorable transport channel forms, and the proton transmission distance was shorten.…”

Section: Resultsmentioning

confidence: 99%

“…The disadvantage of polyoxadiazole for application in membranes and coatings is its low solubility. 26 –29 Poly(aryl phthalazinone ethers) are a kind of high performance polymers with excellent thermal, mechanical, and chemically oxidative-resistant stability, especially outstanding solubility in aprotic polar solvents, due to the noncoplanar configuration in polymer’s main chain. 30,31 Sulfonated poly(phthalazinone ethers) membranes have been explored for Proton exchange membrane fuel cell (PEMFC) application by our lab and other groups, and they have displayed high proton conductivity, thermal and chemical stability, and particularly very low swelling ratio with high IEC.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and physicochemical properties of sulfonated poly(aryl ether) PEMs containing phthalazinone and oxadiazole moieties

Jin

Zhu

2017

High Performance Polymers

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In this work, 2,5-bis(4-fluorophenyl)-1,3,4-oxadiazole (2F-Oz) is synthesized and successfully polymerized with 4-(4-hydroxyaryl)-phthalazin-1-one (DHPZ) through polycondensation to produce poly(ether 1,3,4-oxidiazole) containing phthalazinone units (PPEO) with intrinsic viscosity 1.54 dL g−1. A series of sulfonated poly(ether-1,3,4-oxidiazole)s (SPPEOs) with different degrees of sulfonation are prepared via postsulfonation reaction. The chemical structure of PPEO and SPPEOs was characterized through FT-IR and proton nuclear magnetic resonance, respectively. SPPEOs have excellent film-forming properties and readily dissolve in polar aprotic solvents, such as dimethyl sulfoxide, N-methyl-2-pyrrolidone (NMP), and so on. The water uptake of these SPPEO membranes with measured ion-exchange capacity of 1.13–1.61 mmol g−1 was 15.7–34.1% at 25°C and 17.9–59.8% at 60°C, and swelling ratio was 5.9–14.2% at 25°C and 6.6–18.1% at 60°C, respectively. The proton conductivity of SPPEO-1.61 is 0.045 S cm−1 at 30°C and 0.065 S cm−1 at 80°C, and the tensile strength of the SPPEO-1.61 is 48 MPa, and its elongation at break was 21%. The thermal and chemical stability of the SPPEOs is also examined.

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“…nitro, amino...) into the aromatic nucleus 30 . In the usual way, sulphuric acid is most frequently used for sulfonation of phenolic compounds 31,32 . This method does not give us consistent results with Thymol.…”

Section: Introductionmentioning

confidence: 99%

Original process for Thymol Para-sulfonation: A Preliminary Optimization Study

et al. 2020

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<p class="ElsKeyword">In this study, we described an original, new, simple, and productive one-pot method for Thymol para-sulfonation by using thionyl chloride (SOCl<sub>2</sub>) as a sulfonating agent under mild conditions. Spectroscopic analysis by FT-IR, mass spectrometry, and NMR 1H and 13C confirmed the structure of the parasulfonated derivative of Thymol: the 4-hydroxy-5-isopropyl-2-methylbenzenesulfonic acid. An optimization study was carried out to perform and improve the yield of this new para-sulfonation method by studying the effect of three parameters: temperature, the molar ratio (η) of the reactants, and solvents. The obtained results showed that the use of cyclohexane as a solvent, a molar ratio greater or equal than 3, and working under low temperatures increase the yield of this parasulfonation considerably to reach adequately 91.3%.</p>

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Preparation and evaluation of sulfonated polyoxadiazole membrane containing phenol moiety for PEMFC application

Cited by 19 publications

References 61 publications

Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries

Electrospun Separator Based on Sulfonated Polyoxadiazole with Outstanding Thermal Stability and Electrochemical Properties for Lithium-Ion Batteries

Synthesis and physicochemical properties of sulfonated poly(aryl ether) PEMs containing phthalazinone and oxadiazole moieties

Original process for Thymol Para-sulfonation: A Preliminary Optimization Study

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