Base stable poly(diallylpiperidinium hydroxide) multiblock copolymers for anion exchange membranes

Strasser, Derek J.; Graziano, Brendan J.; Knauss, Daniel M.

doi:10.1039/c7ta00905d

Cited by 83 publications

(79 citation statements)

References 67 publications

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“…This obvious hydrophilic/hydrophobic microscopic phase separation is beneficial for the transmission of hydroxyl ions in AEMs . Compare with the previous AEMs contain aromatic backbones with the similar IEC values,,, the AEMs obtained in the present work showed a higher conductivity at the same temperature, which probably due to the aliphatic backbone chain lead to a higher water uptake and the formation of obviously microscopic phase separation structure in the AEMs.…”

Section: Resultssupporting

confidence: 71%

“…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%

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

Chu

Zhang

et al. 2019

ChemistrySelect

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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.

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Section: Resultssupporting

confidence: 71%

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

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“…42 The high stability of the alicyclic QAs has been rationalized by a low ring strain combined with the constrained conformations imposed by the ring structure, which increase the transition state energy of both substitution and elimination reactions. 42 Later studies by us and others on AEMs functionalized with alicyclic cations such as piperidinium 25,26,44 and different spirocyclic QAs 32,37,[45][46][47][48][49][50][51] have conrmed a high alkaline stability. However, the results also indicate that the stability is highly dependent on precisely how the cations are attached to the polymer backbone.…”

Section: Introductionmentioning

confidence: 99%

Ether-free polyfluorenes tethered with quinuclidinium cations as hydroxide exchange membranes

et al. 2019

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“…However, attaching those molecules into the polymer backbone is a challenge. As a result, there are currently only a few AEMs prepared using heterocyclic and spirocyclic molecules [96][97][98]. Strasser et al [96] prepared promising AEMs by copolymerizing the end-functionalized polydiallylpiperidinium oligomers with polysulfone monomers.…”

Section: Path Dmentioning

confidence: 99%

Prospects for Anion-Exchange Membranes in Alkali Metal–Air Batteries

2019

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Rechargeable alkali metal–air batteries have enormous potential in energy storage applications due to their high energy densities, low cost, and environmental friendliness. Membrane separators determine the performance and economic viability of these batteries. Usually, porous membrane separators taken from lithium-based batteries are used. Moreover, composite and cation-exchange membranes have been tested. However, crossover of unwanted species (such as zincate ions in zinc–air flow batteries) and/or low hydroxide ions conductivity are major issues to be overcome. On the other hand, state-of-art anion-exchange membranes (AEMs) have been applied to meet the current challenges with regard to rechargeable zinc–air batteries, which have received the most attention among alkali metal–air batteries. The recent advances and remaining challenges of AEMs for these batteries are critically discussed in this review. Correlation between the properties of the AEMs and performance and cyclability of the batteries is discussed. Finally, strategies for overcoming the remaining challenges and future outlooks on the topic are briefly provided. We believe this paper will play a significant role in promoting R&D on developing suitable AEMs with potential applications in alkali metal–air flow batteries.

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Base stable poly(diallylpiperidinium hydroxide) multiblock copolymers for anion exchange membranes

Abstract: The development of base-stable cationic groups for anion exchange membranes is important for application in alkaline fuel cells.

Cited by 83 publications

References 67 publications

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

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

Ether-free polyfluorenes tethered with quinuclidinium cations as hydroxide exchange membranes

Prospects for Anion-Exchange Membranes in Alkali Metal–Air Batteries

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