Piperidinium functionalized aryl ether-free polyaromatics as anion exchange membrane for water electrolysers: Performance and durability

Xu, Huibin; Huang, Yingda; Liu, Lei; Ju, Qing; Zhou, Xixing; Qiao, Xiaoqin; Zheng, Zhanfeng; Li, Nanwen

doi:10.1016/j.memsci.2020.118964

Cited by 75 publications

(79 citation statements)

References 53 publications

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“…To further validate the critical role of the ordered microchannel structure of the 2D COF in the improvement of hydroxide conduction, the hydroxide conductivity of the TJU-1 membrane is compared with that of the state-of-the-art AEMs. 36–57 Fig. 5c illustrates that the TJU-1 membrane exhibits relatively high IEC and hydroxide conductivity among the AEMs, which is reasonably ascribed to the well-connected channels within TJU-1.…”

Section: Resultsmentioning

confidence: 85%

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Chen

Zhang

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 85%

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Chen

Zhang

et al. 2022

J. Mater. Chem. A

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“…Redrawn and reproduced from Reference 40 (B) Structure of the poly(terphenyl piperidinium‐ co ‐oxindole terphenylylene) (PTPi) obtained by acid‐catalyzed copolymerization of p ‐terphenyl, isatin and N ‐methyl‐4‐piperidone. Redrawn and reproduced from Reference 41…”

Section: Anion Exchange Membranesmentioning

confidence: 99%

“…Xu et al incorporated isatin repeating unit, instead of diphenylethane, to synthesize poly(terphenyl piperidinium‐ co ‐oxindole terphenylylene) (PTPi), by adopting acid‐catalyzed copolymerization of p ‐terphenyl, isatin and N ‐methyl‐4‐piperidone followed by quaternization by methyl iodide 41 . PTPi‐90 AEMs (Figure 4B), having an IEC of 2.52 mmol g −1 , showed hydroxide ion conductivities of 64 and 128 mS cm −1 at 20 and 80°C, respectively.…”

Section: Anion Exchange Membranesmentioning

confidence: 99%

“…Application of this AEMs in AEMFCs produced maximum power density values of 2.58 W cm À2 (>7.6 A cm À2 current density) and 1.38 W cm À2 at 80 C in H 2 /O 2 and H 2 /air, FC, respectively, and showed a specific power (power density/catalyst loading) value of F I G U R E 3 Structure and properties of alkyl-tethered quaternary ammonium anionic polymers obtained from bromoalkyl-tethered poly(arylene)s. Redrawn and reproduced from Reference 38,39 over 8 W mg À1 (this value is the highest ever recorded for Pt-based AEMFCs so far). Moreover, after immersion of the PDTP AEM in 1 M NaOH at 80 C for 1500 h, and subsequently analyzing the membrane performance in H 2 /O 2 AEMFCs at 0.4 A cm À2 at 80 C, a stability of >100 h was obtained.Xu et al incorporated isatin repeating unit, instead of diphenyle thane, to synthesize poly(terphenyl piperidinium-co-oxindole terphenylylene) (PTPi), by adopting acid-catalyzed copolymerization of p-terphenyl, isatin and N-methyl-4-piperidone followed by quaternization by methyl iodide 41. PTPi-90 AEMs (Figure4B), having an IEC of 2.52 mmol g À1 , showed hydroxide ion conductivities of 64 and 128 mS cm À1 at 20 and 80 C, respectively.…”

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confidence: 99%

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Structures and properties of polymers in ion exchange membranes for hydrogen generation by water electrolysis

Gohil

Dutta

2021

Polymers for Advanced Techs

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Water electrolysis (WE) is an electrochemical process that splits water and forms hydrogen and oxygen, in presence of catalyst. This is a rapidly developing technology owing to its extreme importance in the generation of hydrogen. Membrane-based WE involves the use of anion exchange, proton exchange and bipolar membranes, among which the anion exchange membrane-based WE technology is in the most advanced stage, followed by the proton exchange membrane-based WE. While, the bipolar membrane-based WE is the most nascent technology. Among the different categories of membranes used, polymer-based membranes are the most acceptable ones. It is evident that the structure and properties of the polymers that constitute a membrane play the most important role in determining its applicability in WE application. Keeping this in mind, this review is dedicatedly focused on the different polymers that have been majorly used so far in fabrication of anion exchange, proton exchange, and bipolar membranes for WE, and exclusively analyzes the influence imparted by the structure and properties of the involved polymers on the final performance of the membranes.

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“…While AEM-DMFCs have a greater OCV and marginally improved initial performance compared to Nafion-based DMFCs, the resilience of such membranes often degrades in contrast to Nafion-based membranes, culminating in quick performance degradation [106][107][108]. The quaternized polyaromatics-based AEM polymers such as quaternized polyether ketone and quaternized polysulfone have recently received considerable attention, because of their outstanding conductivity properties, good mechanical and chemical stability [109,110]. However, synthesis of quaternized polyaromatics embraces hazardous compounds such as chloromethylation of benzene rings, which are highly carcinogenic and cytotoxic.…”

Section: Methanol Crossovermentioning

confidence: 99%

A Critical Assessment on Functional Attributes and Degradation Mechanism of Membrane Electrode Assembly Components in Direct Methanol Fuel Cells

2021

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Direct methanol fuel cells (DMFC) are typically a subset of polymer electrolyte membrane fuel cells (PEMFC) that possess benefits such as fuel flexibility, reduction in plant balance, and benign operation. Due to their benefits, DMFCs could play a substantial role in the future, specifically in replacing Li-ion batteries for portable and military applications. However, the critical concern with DMFCs is the degradation and inadequate reliability that affect the overall value chain and can potentially impede the commercialization of DMFCs. As a consequence, a reliability assessment can provide more insight into a DMFC component’s attributes. The membrane electrode assembly (MEA) is the integral component of the DMFC stack. A comprehensive understanding of its functional attributes and degradation mechanism plays a significant role in its commercialization. The methanol crossover through the membrane, carbon monoxide poisoning, high anode polarization by methanol oxidation, and operating parameters such as temperature, humidity, and others are significant contributions to MEA degradation. In addition, inadequate reliability of the MEA impacts the failure mechanism of DMFC, resulting in poor efficiency. Consequently, this paper provides a comprehensive assessment of several factors leading to the MEA degradation mechanism in order to develop a holistic understanding.

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Piperidinium functionalized aryl ether-free polyaromatics as anion exchange membrane for water electrolysers: Performance and durability

Cited by 75 publications

References 53 publications

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Structures and properties of polymers in ion exchange membranes for hydrogen generation by water electrolysis

A Critical Assessment on Functional Attributes and Degradation Mechanism of Membrane Electrode Assembly Components in Direct Methanol Fuel Cells

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