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Synthetic strategies to polymers incorporating N-spirocyclic quaternary ammonium moieties for anion-exchange membranes

Pham, Thanh Huong LU ; Olsson, Joel LU and Jannasch, Patric LU (2018) Nordic Polymer Days 2018
Abstract
Anion exchange membranes (AEM) are central materials in different energy storage and conversion devices such as alkaline fuel cells, electrolysers and flow batteries. The properties of the AEM therefore has a direct impact on the performance and life-time of the devices. As a polymeric electrolyte film that separates the two electrodes, the AEM is required to have good mechanical properties, high anionic conductivity, and high thermal and chemical stability under the given operating conditions. Up until now, the low alkaline stability (especially above 60 °C) of most AEMs developed so far has severely limited the application and commercialization of alkaline energy storage and conversion devices.1

Here, we present some synthetic... (More)
Anion exchange membranes (AEM) are central materials in different energy storage and conversion devices such as alkaline fuel cells, electrolysers and flow batteries. The properties of the AEM therefore has a direct impact on the performance and life-time of the devices. As a polymeric electrolyte film that separates the two electrodes, the AEM is required to have good mechanical properties, high anionic conductivity, and high thermal and chemical stability under the given operating conditions. Up until now, the low alkaline stability (especially above 60 °C) of most AEMs developed so far has severely limited the application and commercialization of alkaline energy storage and conversion devices.1

Here, we present some synthetic strategies recently developed in our group to prepare alkali-stable cationic polymers for AEMs. Inspired by recent findings of Marino and Kreuer2, which includes the a remarkable stability of certain quaternary ammonium (QA) cations such as 6-azonia-spiro[5.5]undecane, we have synthesized different cationic polymers incorporating various N-spirocyclic QAs in either side chains3 (Figure 1a) or directly in the backbone4 to produce N-spirocyclic ionenes4 (Figure 1b). The AEMs based on these polymers displayed both high hydroxide ion conductivity and excellent thermal stability. Moreover, their alkaline stability was significantly improved in comparison with corresponding polymers functionalized with conventional state-of-the-art ammonium cations.3,4 Consequently, AEMs functionalized with this kind of QAs may significantly advance the field of alkaline energy devices. (Less)
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conference name
Nordic Polymer Days 2018
conference location
Copenhagen, Denmark
conference dates
2018-05-28 - 2018-05-30
language
English
LU publication?
yes
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c31082b8-a92e-4f32-8068-bf57064c73d8
date added to LUP
2018-05-14 00:38:43
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2018-11-21 21:39:48
@misc{c31082b8-a92e-4f32-8068-bf57064c73d8,
  abstract     = {Anion exchange membranes (AEM) are central materials in different energy storage and conversion devices such as alkaline fuel cells, electrolysers and flow batteries. The properties of the AEM therefore has a direct impact on the performance and life-time of the devices. As a polymeric electrolyte film that separates the two electrodes, the AEM is required to have good mechanical properties, high anionic conductivity, and high thermal and chemical stability under the given operating conditions. Up until now, the low alkaline stability (especially above 60 °C) of most AEMs developed so far has severely limited the application and commercialization of alkaline energy storage and conversion devices.1<br/><br/>Here, we present some synthetic strategies recently developed in our group to prepare alkali-stable cationic polymers for AEMs. Inspired by recent findings of Marino and Kreuer2, which includes the a remarkable stability of certain quaternary ammonium (QA) cations such as 6-azonia-spiro[5.5]undecane, we have synthesized different cationic polymers incorporating various N-spirocyclic QAs in either side chains3 (Figure 1a) or directly in the backbone4 to produce N-spirocyclic ionenes4 (Figure 1b). The AEMs based on these polymers displayed both high hydroxide ion conductivity and excellent thermal stability. Moreover, their alkaline stability was significantly improved in comparison with corresponding polymers functionalized with conventional state-of-the-art ammonium cations.3,4 Consequently, AEMs functionalized with this kind of QAs may significantly advance the field of alkaline energy devices.},
  author       = {Pham, Thanh Huong and Olsson, Joel and Jannasch, Patric},
  language     = {eng},
  location     = {Copenhagen, Denmark},
  title        = {Synthetic strategies to polymers incorporating <i>N</i>-spirocyclic quaternary ammonium moieties for anion-exchange membranes},
  year         = {2018},
}