The effect of polymer backbones and cation functional groups on properties of anion exchange membranes for fuel cells

Yang, Kuan; Chu, Xiaomeng; Zhang, Xiaojuan; Li, Xiaofeng; Zheng, Jifu; Li, Shenghai; Li, Nanwen; Sherazi, Tauqir A.; Zhang, Suobo

doi:10.1016/j.memsci.2020.118025

Cited by 55 publications

(29 citation statements)

References 40 publications

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“…After immersion in 2 mol L −1 KOH at 80 °C for 30 days, the structure of this polymer exhibited no chemical degradation detected by 1 H NMR spectroscopy. Yang et al [98,99] Figure 4. a) Decomposition pathways of imidazolium; Reproduced with permission.…”

Section: Modified Imidazoles For Anion Exchange Membranesmentioning

confidence: 99%

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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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Section: Modified Imidazoles For Anion Exchange Membranesmentioning

confidence: 99%

mentioning

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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“…[7][8][9][10][11] There are many kinds of fuel cells, among which anion exchange membrane fuel cells (AEMFCs) have the advantages of non-precious metal as catalyst, low fuel permeability, flexibility of fuel and corrosion resistance of electrodes. [12][13][14][15][16] Therefore, it has attracted the attention of scientists all over the world, and it has broad application prospect. [17][18][19] AEMs are the core material of AEMFCs, and its properties directly affect the properties of AEMFCs.…”

Section: Introductionmentioning

confidence: 99%

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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“…To improve hydroxide conductivity and alkaline stability under strong alkaline conditions, AEMs with different macromolecular architectures have been prepared, such as main chain type [11], block type [12,13], side chain type [14,15], comb-shaped type [16], hyperbranched [17] and mobile ion shuttles [18]. The polymer backbones employed include polyolefins [19], poly(phenylene oxide)s [20], poly(aryl ether sulfone)s (PAES) [21,22], poly(arylene ether ketone)s [23,24], poly(aryl ether nitrile)s [25], poly(benzimidazole)s [26], and numerous other structures [27]. The functional groups for the preparation of AEMs mainly consist of quaternary ammonium [28,29], imidazole [30,31], quaternary phosphornium [32], guanidine [33] and metalbased cations [34].…”

Section: Introductionmentioning

confidence: 99%

Anion exchange membranes with eight flexible side-chain cations for improved conductivity and alkaline stability

et al. 2020

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Increasing the local charge density of flexible side-chain cations in the hydrophilic segments of anion exchange membranes (AEMs) is helpful for improving their properties. However, due to limitations of structural design strategies and available synthetic methods, very few AEMs with more than four flexible side-chain cationic groups in hydrophilic segments have been reported. In order to further improve the hydroxide conductivity, alkaline stability and dimensional stability, herein we report a series of AEMs containing eight flexible side-chain cations in hydrophilic segments, based on poly(aryl ether sulfone)s (PAES). The synthesis, ion exchange capacity (IEC), water absorption, dimensional swelling, alkaline stability and hydroxide conductivity of the obtained membranes (PAES-8TMA-x) were examined and the relationships between structures and properties of different types of AEMs were also systematically compared. The resulting AEMs with IEC values of 1.76-2.76 mmol g −1 displayed comprehensively desirable properties, with hydroxide conductivities of 62.7-92.8 mS cm −1 and dimensional swelling in the range of 8.3% to 15.8% at 60°C. The IEC and hydroxide conductivity for a representative sample, PAES-8TMA-0.35, maintained 82.2% and 79.6% of the initial values after being immersed in 2 mol L −1 NaOH at 90°C for 480 h, respectively. This study expands the design and preparation of AEMs containing high local densities of flexible side chain cations, and provides a new strategy for new AEM materials.

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The effect of polymer backbones and cation functional groups on properties of anion exchange membranes for fuel cells

Cited by 55 publications

References 40 publications

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

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

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

Anion exchange membranes with eight flexible side-chain cations for improved conductivity and alkaline stability

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