Fully aromatic naphthalene-based sulfonated poly(arylene ether ketone)s with flexible sulfoalkyl groups as polymer electrolyte membranes

Wang, Baolong; Cai, Zhenzhen; Zhang, Na; Zhang, Bin; Qi, Duo; Zhao, Chengji; Na, Hui

doi:10.1039/c4ra12651c

Cited by 20 publications

(37 citation statements)

References 37 publications

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“…1,2 In the past years, PEMFCs have been widely applied in a number of areas, such as aerospace, transportation, and as mobile power stations. [6][7][8][9][10] The peruoride-based membrane of Naon® is the most common commercial PEM, which shows an outstanding chemical stability and excellent proton conductivity. [6][7][8][9][10] The peruoride-based membrane of Naon® is the most common commercial PEM, which shows an outstanding chemical stability and excellent proton conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5] The proton exchange membrane (PEM) serves as the electrode separator in addition to its primary role as a continuous medium for conducting protons from anode to cathode. [6][7][8][9][10] The peruoride-based membrane of Naon® is the most common commercial PEM, which shows an outstanding chemical stability and excellent proton conductivity. 11,12 However, the proton conductivity decreases signicantly at temperatures above 80 C due to the evaporation of water from the membranes, thus limiting proton mobility.…”

Section: Introductionmentioning

confidence: 99%

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Anhydrous proton exchange membranes at elevated temperatures: effect of protic ionic liquids and crosslinker on proton conductivity

2015

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A series of novel anhydrous proton exchange membranes (poly(vinyl alcohol)-citric acid-ionic liquid (PVA-CA-IL)) were prepared using the low cost ionic liquids ethylammonium nitrate (EAN), diethylammonium nitrate (DEAN), and triethylammonium nitrate (TEAN) as conductive fillers in PVA support membrane. The properties of the PVA-CA-IL membranes can be controlled by changing the molar ratio of the PVA, ILs and CA. The thermal stability of PVA-CA-IL membrane was measured by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), and the microstructure was investigated using scanning electron microscopy (SEM) and the Anton-paar SAX Sess mc2 system (SAXS). The effects of temperature, ILs and crosslinker dosage on proton conductivity were also systematically investigated.The results showed that the PVA-CA-IL membranes had excellent performance. The proton conductivity of PVA-CA-EAN (mole ratio ¼ 1 : 0.05 : 0.4) could reach up to 7.8 mS cm À1 at 140 C. The introduction of ionic liquid into PVA membrane constituted a new and efficient kind of anhydrous proton exchange membrane.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anhydrous proton exchange membranes at elevated temperatures: effect of protic ionic liquids and crosslinker on proton conductivity

2015

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“…The first weight loss of composite membranes started at 260 °C, which should be attributed to the thermal degradation of the CNC in the membranes. The second weight loss stage started at 360 °C, which was caused by the shedding of sulfonic acid groups . The third degradation step appeared at 550 °C–680 °C, which was attributed to the decomposition of the main chain of sPEEKK.…”

Section: Resultsmentioning

confidence: 99%

Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate

Zhao

Wei

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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Study on proton exchange membrane (PEM) with the aim toward excellent battery performance of PEM for fuel cells has attracted increasing attention. In this work, nanocellulose (CNC) aminated by KH792 noted as NN was prepared. CNC or NN/sulfophenylated poly(ether ether ketone ketone) (sPEEKK) nanocomposite membrane (SN) or (SNN) were produced by solution mixing. SNN was further coated with tetraethyl orthosilicate (TEOS) to obtain SNNT. The properties of sPEEKK, SN, SNN, and SNNT membranes were thoroughly investigated. The proton conductivity of SN4 was 0.22 S·cm−1 at 90 °C, while a proton conductivity of 0.30 S·cm−1 was obtained for SNN4, and an even higher value of 0.36 S·cm−1 at 90 °C was obtained for the TEOS‐coated SNN4 (SNN4T). Meanwhile, SNN4T showed high thermal stability, and its Td5 was as high as 318.2 °C. Furthermore, the composite membrane coated with TEOS also presented excellent oxidative stability. The mass of SNN2T after treated in Fenton agent for 1 h at 80 °C was still retained 96.2%, and it was not fully dissolved until 11 h. It was illustrated that aminated CNC/sPEEKK nanocomposite membranes coated with TEOS is a kind of promising materials as PEMs for fuel cells. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2190–2200

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“…The content of methanol was measured by 1 H NMR according to our previous report. 29,30 First, 1-mL sample taken from deionized water chamber, 10-mL high-performance liquid chromatography (HPLC) grade tetrahydrofuran (THF) as the standard substance and DMSO- d 6 were added into NMR tube. Then, 1 H NMR measurements were performed on a 500 MHz Bruker 510 spectrometer.…”

Section: Methodsmentioning

confidence: 99%

Poly(ether ether ketone) grafted with sulfoalkylamine as proton exchange membrane

Shao

Zhao

2018

High Performance Polymers

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A series of side-chain-type sulfonated poly(arylene ether ketone)s with high ion exchange capacity (IEC) values were prepared by polycondensation reaction of 4,4′-difluorobenzophenone with 2,2′-bis(3-amino-4-hydroxyphenyl) and bisphenol A, followed by post-grafting reaction using 1,4-butanesultone. For these obtained membranes, sulfoalkylamine functionalized poly(ether ether ketone) (SAm-PEEK)-0.8 with the highest IEC of 3.42 mequiv. g−1 displayed the highest proton conductivity of 0.11 S cm−1 at 25°C and 0.167 S cm−1 at 60°C, respectively. The morphology of these membranes was investigated by transmission electron microscope analysis. The result showed that these membranes exhibited well-connected hydrophilic channels due to their high IEC values and densely populated flexible acid side chains. Owing to their low methanol permeability and high selectivity, SAm-PEEK- x membranes are promising candidates for direct methanol fuel cell applications.

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Fully aromatic naphthalene-based sulfonated poly(arylene ether ketone)s with flexible sulfoalkyl groups as polymer electrolyte membranes

Abstract: Naphthalene-based poly(arylene ether ketone)s with pendant sulfoalkyl groups were prepared by a demethylation and sulfobutylation method. They exhibited high proton conductivity, low methanol permeability and high thermal stability.

Cited by 20 publications

References 37 publications

Anhydrous proton exchange membranes at elevated temperatures: effect of protic ionic liquids and crosslinker on proton conductivity

Anhydrous proton exchange membranes at elevated temperatures: effect of protic ionic liquids and crosslinker on proton conductivity

Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate

Poly(ether ether ketone) grafted with sulfoalkylamine as proton exchange membrane

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