Practical implementation of bis-six-membered N-cyclic quaternary ammonium cations in advanced anion exchange membranes for fuel cells: Synthesis and durability

Chu, Xiaomeng; Liu, Lei; Huang, Yingda; Guiver, Michael D.; Li, Nanwen

doi:10.1016/j.memsci.2019.02.051

Cited by 115 publications

(51 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…52,53 The To compare our membranes with recently reported AEMs, we summarize the AEMFCs peak power densities as a function of room temperature OH − conductivities for recently reported AEMs that based on similar aryl ether-containing polyaromatics backbone (Figure 4g and Table S2). 9,20,21,47,[54][55][56][57][58][59][60][61][62][63][64][65][66][67][68] And our QA38PPO-P membrane show a competitive OH − conductivity and fuel cell performance among these AEMs. This highlights the advantages of developing AEMs containing well-defined cation-dipole interaction networks, which can form inter-connected ionic channels that facilitate ion transport.…”

Section: Simulation Studiesmentioning

confidence: 91%

Cation–dipole interaction that creates ordered ion channels in an anion exchange membrane for fastOH⁻conduction

Zhang

et al. 2021

AIChE Journal

View full text Add to dashboard Cite

Precise control over polyelectrolyte architecture, engineered for self-assembly of ion-conducting channels, is of fundamental and technological importance to many fields, for example, fuel cells and redox flow batteries and electrodialysis. Building on recent advances with the supramolecular chemistry, we introduce inter/intramolecular cation-dipole interactions between pendent quaternary ammoniums cations and polar polyethylene glycol grafts in an anion-exchange membrane (AEM). Such interactions lead to desirable, ordered ion-conducting pathways when in the membrane form. Comparison of the results of molecular dynamics simulation with 1 H NMR and nano-scale microscopy analyses show that the cation-dipole interactions enhance self-assembly and the formation of interconnected ionic network domains, providing three-dimensional pathways for both water and ion transport. The resultant AEM exhibits high OH − conductivity (49 mS cm −1 at 30 C) and a completive peak power density of 622 mW cm −2 at 70 C when tested in a H 2 /O 2 single-cell alkaline membrane fuel cell.

show abstract

Section: Simulation Studiesmentioning

confidence: 91%

Cation–dipole interaction that creates ordered ion channels in an anion exchange membrane for fastOH⁻conduction

Zhang

et al. 2021

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…The excellent alkaline stability of spirocyclic QA cation was also confirmed by theoretical calculations . Based on their determination of alkaline stability of the small molecules, the aromatic polymers with pendent spirocyclic QA and piperidinium cations have been synthesized and used to prepare AEMs . Hickner's work indicated that the backbone of AEMs have effect on the alkaline stability of cations, and the AEM has aromatic backbone with ether groups is not stable in alkaline condition.…”

Section: Introductionmentioning

confidence: 86%

Cross‐Linked Spirocyclic Quaternary Ammonium‐Based Anion Exchange Membrane with Tunable Properties for Fuel Cell Applications

Chu

Zhang

et al. 2019

ChemistrySelect

View full text Add to dashboard Cite

The alkaline stability of anion exchange membranes (AEMs) is crucial to the performance of alkaline anion exchange membrane fuel cells (AEMFCs). Here, we have prepared and characterization of a series of new spirocyclic quaternary ammonium‐based AEMs with good alkaline stability. The AEMs was obtained by UV‐initiated polymerization of N, N‐diallylpiperidinium bromide ([DAPip][Br]), styrene and acrylonitrile. The water uptake, swelling ratio, IEC and conductivity of the AEMs increase with increasing the [DAPip][Br] content. The transparent and mechanically robust AEMs show high conductivities (7.99×10−2 S cm−1 at 80 °C) and good alkaline stability in 1 M KOH solution at 80 °C. The single cell with [DAPip][OH]20 showed a maximum power density of 93.9 mW cm−2. The spirocyclic quaternary ammonium‐based AEMs with an aliphatic backbone will open up new prospects for the preparation of AEMs with excellent alkaline stability and high conductivity.

show abstract

“…Friedel–Crafts acylation and reduction have been applied by several groups to attach functional groups to the benzene rings of polymer backbones such as poly(phenylene), polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene, poly(phenylene oxide), and poly(aryl ether) [ 25 , 26 , 27 , 28 , 29 ]. Chu et al used a polystyrene (PS)-based electrode binder with an alkylammonium-group-bearing backbone as an in-house-made ionomer for poly(phenylene oxide)-based membranes [ 30 ]. However, no specific structural analysis or explanation of PS-based ionomer has been reported so far.…”

Section: Introductionmentioning

confidence: 99%

Polystyrene-Based Hydroxide-Ion-Conducting Ionomer: Binder Characteristics and Performance in Anion-Exchange Membrane Fuel Cells

et al. 2021

View full text Add to dashboard Cite

Polystyrene-based polymers with variable molecular weights are prepared by radical polymerization of styrene. Polystyrene is grafted with bromo-alkyl chains of different lengths through Friedel–Crafts acylation and quaternized to afford a series of hydroxide-ion-conducting ionomers for the catalyst binder for the membrane electrode assembly in anion-exchange membrane fuel cells (AEMFCs). Structural analyses reveal that the molecular weight of the polystyrene backbone ranges from 10,000 to 63,000 g mol−1, while the ion exchange capacity of quaternary-ammonium-group-bearing ionomers ranges from 1.44 to 1.74 mmol g−1. The performance of AEMFCs constructed using the prepared electrode ionomers is affected by several ionomer properties, and a maximal power density of 407 mW cm−2 and a durability exceeding that of a reference cell with a commercially available ionomer are achieved under optimal conditions. Thus, the developed approach is concluded to be well suited for the fabrication of next-generation electrode ionomers for high-performance AEMFCs.

show abstract

Practical implementation of bis-six-membered N-cyclic quaternary ammonium cations in advanced anion exchange membranes for fuel cells: Synthesis and durability

Cited by 115 publications

References 47 publications

Cation–dipole interaction that creates ordered ion channels in an anion exchange membrane for fastOH⁻conduction

Cation–dipole interaction that creates ordered ion channels in an anion exchange membrane for fastOH⁻conduction

Cross‐Linked Spirocyclic Quaternary Ammonium‐Based Anion Exchange Membrane with Tunable Properties for Fuel Cell Applications

Polystyrene-Based Hydroxide-Ion-Conducting Ionomer: Binder Characteristics and Performance in Anion-Exchange Membrane Fuel Cells

Contact Info

Product

Resources

About

Practical implementation of bis-six-membered N-cyclic quaternary ammonium cations in advanced anion exchange membranes for fuel cells: Synthesis and durability

Cited by 115 publications

References 47 publications

Cation–dipole interaction that creates ordered ion channels in an anion exchange membrane for fastOH−conduction

Cation–dipole interaction that creates ordered ion channels in an anion exchange membrane for fastOH−conduction

Cross‐Linked Spirocyclic Quaternary Ammonium‐Based Anion Exchange Membrane with Tunable Properties for Fuel Cell Applications

Polystyrene-Based Hydroxide-Ion-Conducting Ionomer: Binder Characteristics and Performance in Anion-Exchange Membrane Fuel Cells

Contact Info

Product

Resources

About

Cation–dipole interaction that creates ordered ion channels in an anion exchange membrane for fastOH⁻conduction

Cation–dipole interaction that creates ordered ion channels in an anion exchange membrane for fastOH⁻conduction