Non-Monotonic Change of Hydroxide Ion Diffusion with Increasing Temperature in Anion Exchange Membranes

2020 ◽  
Vol MA2020-01 (50) ◽  
pp. 2755-2755
Author(s):  
Tamar Zelovich ◽  
Leslie Vogt ◽  
Mark E. Tuckerman
Keyword(s):  
Anion Exchange ◽  
Anion Exchange Membranes ◽  
Ion Diffusion ◽  
Hydroxide Ion ◽  
Monotonic Change ◽  
Increasing Temperature

Hydroxide Ion Diffusion in Anion-Exchange Membranes at Low Hydration: Insights from Ab Initio Molecular Dynamics

2019 ◽  
Vol 31 (15) ◽  
pp. 5778-5787 ◽  
Author(s):  
Tamar Zelovich ◽  
Leslie Vogt-Maranto ◽  
Michael A. Hickner ◽  
Stephen J. Paddison ◽  
Chulsung Bae ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Ab Initio ◽  
Anion Exchange ◽  
Ab Initio Molecular Dynamics ◽  
Anion Exchange Membranes ◽  
Ion Diffusion ◽  
Hydroxide Ion

scholarly journals Anion-exchange membranes with polycationic alkyl side chains attached via spacer units

2016 ◽  
Vol 4 (43) ◽  
pp. 17138-17153 ◽  
Author(s):  
Hai-Son Dang ◽  
Patric Jannasch
Keyword(s):  
Anion Exchange ◽  
Ion Conductivity ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Hydroxide Ion ◽  
Alkaline Stability ◽  
Phenylene Oxide ◽  
Alkyl Side Chains

Poly(phenylene oxide)s carrying pendant polycationic alkyl side chains with a suitable configuration show high hydroxide ion conductivity and excellent alkaline stability.

Multi-cation crosslinked anion exchange membranes from microporous Tröger's base copolymers

2018 ◽  
Vol 6 (27) ◽  
pp. 13302-13311 ◽  
Author(s):  
Chuan Hu ◽  
Qiugen Zhang ◽  
Chenxiao Lin ◽  
Zhen Lin ◽  
Ling Li ◽  
...  
Keyword(s):  
Ion Channels ◽  
Anion Exchange ◽  
Dimensional Stability ◽  
Alkali Resistance ◽  
Anion Exchange Membranes ◽  
Ion Diffusion ◽  
Troger's Base

The multi-cation cross-linked AEMs based on Tröger's base promote the formation of continuous ion diffusion channels. The prepared AEMs, with the size of ion channels in the range of 15–26 nm, have good dimensional stability and excellent alkali resistance while exhibiting a high hydroxide conductivity of 103.9 mS cm−1 (80 °C) at a low IEC of 1.67 meq g−1.

Hydroxide Ion Highway Constructed by Orderly Aligned Quaternary Ammonium Groups in Anion Exchange Membranes

2017 ◽  
Vol 164 (12) ◽  
pp. F1051-F1062 ◽  
Author(s):  
Yifu Wang ◽  
Heting Wan ◽  
Jilin Wang ◽  
Lulu Wang ◽  
Ruijiang Feng
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membranes ◽  
Hydroxide Ion

scholarly journals Poly(phenylene oxide) functionalized with quaternary ammonium groups via flexible alkyl spacers for high-performance anion exchange membranes

2015 ◽  
Vol 3 (10) ◽  
pp. 5280-5284 ◽  
Author(s):  
Hai-Son Dang ◽  
Eva Annika Weiber ◽  
Patric Jannasch
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
High Performance ◽  
Ion Conductivity ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Hydroxide Ion ◽  
Alkaline Stability ◽  
Phenylene Oxide ◽  
Alkyl Side Chains

Hydroxide ion conductivity and alkaline stability of anion exchange membranes were dramatically improved by placing quaternary ammonium groups on long alkyl side chains.

Polybenzimidazoles with Pendant Quaternary Ammonium Groups as Anion Exchange Membranes: Synthesis, Characterization and Alkaline Stability

2014 ◽  
Vol 1677 ◽  
Author(s):  
Mahesh P. Kulkarni ◽  
Timothy J. Peckham ◽  
Owen D. Thomas ◽  
Steven Holdcroft
Keyword(s):  
Ambient Temperature ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Chemical Structure ◽  
Anion Exchange Membranes ◽  
Hydroxide Ion ◽  
Structure Degradation ◽  
Ion Conductivities ◽  
Anionic Exchange ◽  
Novel Method

ABSTRACTA novel method for introducing quaternary ammonium-bearing side chains has been developed and applied to a polybenzimidazole backbone to generate new anionic-exchange polymers, TMHA-m-FPBI where m = the degree of substitution of available sites (values ranging from 74 to 100%). These polymers have been shown to exhibit hydroxide ion conductivities up to 34 mS cm-1 in hydrated membranes at ambient temperature and 13 mS cm-1 at 60 °C, RH = 95%. Immersion of these polymers in 2 M KOH at 60 °C has shown they remain stable with no sign of chemical structure degradation to a period of at least 15 days.

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