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Molecular design and synthesis of hydroxide ion exchange membranes carrying alicyclic quaternary ammonium cations

Pham, Thanh Huong LU ; Olsson, Joel LU ; Allushi, Andrit LU and Jannasch, Patric LU (2019) 22nd International Conference on Solid State Ionics
Abstract
Significantresearch efforts are currently directed towards the synthesis and studies of durable anion exchange membranes (AEMs) with the aim to develop alkaline fuel cells and electrolyzers able to operate efficiently without platinum-groupmetal catalysts [1]. The grand challenge is to identify and synthesize polymeric AEM materials possessingthe necessary chemical and thermal stability. Studies of different small cationic model compounds have revealed that aliphatic mono-and bicyclicquaternary ammonium (QA) cations have a very high alkaline stability, most probably because the constrained ring conformations increase the transition state energy of the degradation reactions [2].We... (More)
Significantresearch efforts are currently directed towards the synthesis and studies of durable anion exchange membranes (AEMs) with the aim to develop alkaline fuel cells and electrolyzers able to operate efficiently without platinum-groupmetal catalysts [1]. The grand challenge is to identify and synthesize polymeric AEM materials possessingthe necessary chemical and thermal stability. Studies of different small cationic model compounds have revealed that aliphatic mono-and bicyclicquaternary ammonium (QA) cations have a very high alkaline stability, most probably because the constrained ring conformations increase the transition state energy of the degradation reactions [2].We have previously reported on the functionalization of poly(phenylene oxide) with different cyclo-aliphatic QA cations attached via flexible alkyl spacers [3]. In a different approach, we have designed, synthesized and studied polyelectrolytes containing N-spirocyclic cations, including N-spirocyclic quaternary ammonium ionenes ("spiro-ionenes") [4]. In addition, our group recently reported on the preparation and properties of ether-free poly(arylene piperidinium)s as a new class of high-performance AEMsdirectly accessible from commercially available and quiteinexpensive starting materials[5,6]. Very recently we have also prepared studied poly(arylene alkylene)swith different configurations and locationsof the cations(Scheme 1). In the current presentation we will discuss molecular design principles, syntheticprocedures and important structure-property relationships of these new polymer electrolyte materials (Less)
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host publication
Proceedings of 22nd International Conference of Solid State Ionics
publisher
The International Society for Solid State Ionics (ISSI)
conference name
22nd International Conference on Solid State Ionics
conference location
PyeongChang, Korea, Republic of
conference dates
2019-06-16 - 2019-06-21
language
English
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yes
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f3cb5060-cafa-4f23-8e0e-70401f5dc256
alternative location
http://sigongji.ssi-22.org/abstract/FM-010.pdf
date added to LUP
2019-06-19 03:26:46
date last changed
2019-06-26 16:32:25
@inproceedings{f3cb5060-cafa-4f23-8e0e-70401f5dc256,
  abstract     = {Significantresearch efforts are currently directed towards the synthesis and studies of durable anion exchange  membranes (AEMs) with the aim to  develop alkaline fuel cells  and electrolyzers able to operate  efficiently  without  platinum-groupmetal  catalysts  [1].  The  grand  challenge  is  to  identify and  synthesize  polymeric  AEM  materials possessingthe  necessary  chemical  and  thermal  stability. Studies  of  different  small  cationic  model  compounds  have  revealed  that  aliphatic  mono-and bicyclicquaternary  ammonium  (QA)  cations  have  a  very  high  alkaline  stability,  most  probably because  the  constrained  ring  conformations  increase  the  transition  state  energy  of  the  degradation reactions [2].We have previously reported on the functionalization of poly(phenylene oxide) with different cyclo-aliphatic  QA  cations  attached  via  flexible  alkyl  spacers  [3].  In  a  different  approach,  we  have designed,  synthesized  and  studied  polyelectrolytes  containing N-spirocyclic  cations,  including N-spirocyclic  quaternary  ammonium  ionenes  ("spiro-ionenes")  [4].  In  addition,  our  group recently reported on the preparation and properties of ether-free poly(arylene piperidinium)s as a new class of high-performance AEMsdirectly accessible from commercially available and quiteinexpensive starting  materials[5,6]. Very  recently  we  have  also prepared studied  poly(arylene  alkylene)swith different configurations and locationsof the cations(Scheme 1). In the current presentation we will discuss   molecular   design   principles,   syntheticprocedures   and   important   structure-property relationships of these new polymer electrolyte materials},
  author       = {Pham, Thanh Huong and Olsson, Joel and Allushi, Andrit and Jannasch, Patric},
  language     = {eng},
  location     = {PyeongChang, Korea, Republic of},
  publisher    = {The International Society for Solid State Ionics (ISSI) },
  title        = {Molecular design and synthesis of hydroxide ion exchange membranes carrying alicyclic quaternary ammonium cations},
  year         = {2019},
}