Ether spaced N-spirocyclic quaternary ammonium functionalized crosslinked polysulfone for high alkaline stable anion exchange membranes

Zhang, Yang; Chen, Wanting; Yan, Xiaoming; Zhang, Fan; Wang, Xiaozhou; Wu, Xuemei; Pang, Bo; Wang, Jinyan; He, Gaohong

doi:10.1016/j.memsci.2019.117650

Cited by 58 publications

(31 citation statements)

References 55 publications

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“…In addition, the characteristic peak of QA groups appeared at 1337 cm −1. [42][43][44][45] We can observe the peak from TPAEKS membrane, CImTPAEKS-1 membrane, CImTPAEKS-2 membrane, CImTPAEKS-3 membrane, and the peak gradually decreased. Peaks of 746 cm −1 accorded to characteristic peak in imidazolium group, 44,[46][47][48][49][50] and were found in CImTPAEKS-1 membrane, CImTPAEKS-2 membrane, CImTPAEKS-3 membrane, and CImPAEKS membrane.…”

Section: Structure Characterizationmentioning

confidence: 88%

Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

Yang

et al. 2021

Int J Energy Res

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Section: Structure Characterizationmentioning

confidence: 88%

Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

Yang

et al. 2021

Int J Energy Res

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“…The PS-ASU membrane had no obvious structural degradation in strong alkaline solution at 80 °C even for 3000 h, showing high chemical stability. The blended AEMs (SEBS/PS-ASU-30 membrane) prepared from PS-ASU and poly(styrene-ethylene-co-butylene-styrene) (SEBS) copolymer had just a 16.8% loss in conductivity in the accelerated stability test in 5 mol L −1 NaOH at 80 °C for 1800 h. Zhang et al [73] prepared a series of poly(aryl ether sulfone)s with side-chain flexible ether-spaced N-spirocyclic QA by the Williamson reaction (Figure 2d). The obtained AEM displayed high hydroxide conductivity (85.7 mS cm −1 , 80 °C) due to the incorporation of flexible etheroxygen linkage in side chain, which promotes the aggregation of spirocyclic cations.…”

Section: Cyclic and Spirocyclic Quaternary Ammonium Cations For Anion Exchange Membranesmentioning

confidence: 99%

Progress in High‐Performance Anion Exchange Membranes Based on the Design of Stable Cations for Alkaline Fuel Cells

Tao

Wang

Zhao

et al. 2021

Adv Materials Technologies

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Solid alkaline fuel cells with anion exchange membranes (AEMs) have drawn wide attention and have become an important focus in the field of renewable energy cells in recent years due to their high electrode activity, potential application of non‐precious metal catalysts, and relatively low requirements for fuel purity. AEM is the central component in solid alkaline fuel cells, and plays the role of conducting ions, blocking fuel crossover and providing catalyst support in fuel cells. Its performance directly affects the efficiency and service life of fuel cells. With some exceptions, the majority of AEMs have relatively low hydroxide conductivity and poor durability, which cannot meet the requirements of practical applications. The past decade has witnessed great progress in AEM designs and stability. Various kinds of AEMs with different cationic structures have been designed, and their properties and application in fuel cells are investigated. This review provides a comparative investigation and summary of highlights from the design of cationic structures for AEMs, including cyclic and spirocyclic quaternary ammonium cations, modified quaternary phosphonium, modified imidazoles, guanidinium, and metal cations. The authors’ perspective on the remaining challenges and directions of AEMs research for future development are also discussed.

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“…11,12 Some methods, including the design of side-chain type, crosslinking, and densely functionalized AEMs, have been reported to prepare hydrophobic/hydrophilic phase separation structures. [13][14][15][16] Recently, AEMs based on poly(olefin), with three quaternary ammonium groups per side chain, exhibited significantly higher hydroxide conductivity because of phase separation in multiple cation structures. 17 In addition, fluorine contain poly(olefin)-based AEMs showed excellent hydroxide conductivity because of the lower binding energy of fluorinated AEMs to hydroxide ions and water molecules that facilitates ion transport.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, establishing hydrophobic/hydrophilic phase separation is a useful approach for increasing hydroxide conductivity 11,12 . Some methods, including the design of side‐chain type, crosslinking, and densely functionalized AEMs, have been reported to prepare hydrophobic/hydrophilic phase separation structures 13–16 . Recently, AEMs based on poly(olefin), with three quaternary ammonium groups per side chain, exhibited significantly higher hydroxide conductivity because of phase separation in multiple cation structures 17 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ionic polybenzimidazoles with broad ion exchange capacity range for anion exchange membrane fuel cell application

Abdi

Chen

Chiu

et al. 2021

Journal of Polymer Science

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In this study, new anion exchange membranes (AEM) based on crosslinked polybenzimidazole (m-PBI) with quaternary ammonium groups, crosslinkable allyl groups, and hydrophobic ethyl groups as side chains are synthesized and characterized. The AEMs are crosslinked by thermal thiol-ene reaction using a dithiol crosslinker. The ion exchange capacity (IEC) values and crosslinking density were controlled by the number of quaternary ammonium groups and allyl groups, respectively. The introduction of ethyl groups improved the solubility of ionic PBIs even at very low IEC values by eliminating the hydrogen bonding interaction of imidazole rings. This method allows ionic PBIs with broad IEC values, from 0.75 to 2.55 mmol/g, to be prepared. The broad IEC values were achieved by independently controlling the numbers of quaternary ammonium groups, allyl groups, and hydrophobic ethyl groups during preparation. The crosslinked ionic PBIs revealed hydroxide conductivity from 16 to 86 mS/cm at 80 C. The wet membranes also showed excellent mechanical strength with tensile strength of 12.2 to 20.1 MPa and Young's Modulus of 0.67 to 1.45 GPa. The hydroxide conductivity of a crosslinked membrane (0.40Q0.60Et1.00Pr, IEC = 0.95 mmol/g) decreased only 7.9% after the membranes was immersed in a 1.0 M sodium hydroxide solution at 80 C for 720 h.A single fuel cell based on this membrane showed a maximum peak power density of 136 mW/cm 2 with a current density of 377 mA /cm 2 at 60 C.

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Ether spaced N-spirocyclic quaternary ammonium functionalized crosslinked polysulfone for high alkaline stable anion exchange membranes

Cited by 58 publications

References 55 publications

Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

Progress in High‐Performance Anion Exchange Membranes Based on the Design of Stable Cations for Alkaline Fuel Cells

Synthesis of ionic polybenzimidazoles with broad ion exchange capacity range for anion exchange membrane fuel cell application

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