Improvement the hydroxide conductivity and alkaline stability simultaneously of anion exchange membranes by changing quaternary ammonium and imidazole contents

2021 ◽  
Author(s):  
Kai Yang ◽  
Hongzhe Ni ◽  
Xinming Du ◽  
Tianen Shui ◽  
Hongcheng Shen ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membranes ◽  
Alkaline Stability

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.

scholarly journals Anion exchange membranes containing no β-hydrogen atoms on ammonium groups: synthesis, properties, and alkaline stability

RSC Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 1030-1038
Author(s):  
Daniel Koronka ◽  
Kenji Miyatake
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membranes ◽  
Hydrogen Atoms ◽  
Alkaline Stability ◽  
Synthesis Properties ◽  
Harsh Conditions

A novel hydrophilic structure with no β-hydrogen atoms on the quaternary ammonium functionality has been developed for anion exchange membranes. The membranes featured high hydroxide conductivity and alkaline stability under harsh conditions.

scholarly journals Rational molecular design of anion exchange membranes functionalized with alicyclic quaternary ammonium cations

2020 ◽  
Vol 11 (43) ◽  
pp. 6953-6963
Author(s):  
Thanh Huong Pham ◽  
Andrit Allushi ◽  
Joel S. Olsson ◽  
Patric Jannasch
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Molecular Design ◽  
Polymer Membranes ◽  
Anion Exchange Membranes ◽  
Quaternary Ammonium Cations ◽  
Alkaline Stability ◽  
Rational Molecular Design

Piperidine-based cations tethered to ether-free polymer membranes via the 4-position instead of the conventional 1(N)-position show significantly improved thermal and alkaline stability while retaining high hydroxide conductivity.

A general strategy to enhance the alkaline stability of anion exchange membranes

2017 ◽  
Vol 5 (13) ◽  
pp. 6318-6327 ◽  
Author(s):  
Jiajia Chen ◽  
Cunpu Li ◽  
Jianchuan Wang ◽  
Li Li ◽  
Zidong Wei
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Reversible Reaction ◽  
General Strategy ◽  
Anion Exchange Membranes ◽  
Carbonyl Groups ◽  
Alkaline Stability

Carbonyl groups protect quaternary ammonium groups by reversible reaction with OH− ions. This protection is named the “rat-trap effect”.

Alkaline stable anion exchange membranes based on poly(phenylene-co-arylene ether ketone) backbones

2016 ◽  
Vol 7 (38) ◽  
pp. 5988-5995 ◽  
Author(s):  
Xiang Qiu ◽  
Mitsuru Ueda ◽  
Yi Fang ◽  
Shouwen Chen ◽  
Zhaoxia Hu ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membranes ◽  
Alkaline Stability ◽  
Arylene Ether ◽  
Ether Ketone ◽  
Stable Anion

To improve the alkaline stability of anion exchange membranes (AEMs) based on conventional poly(ether ketone/sulfone) backbones, two novel poly(phenylene-co-arylene ether ketone) (PPAEK) ionomers with a quaternary ammonium (QA-) or imidazolium (IM-) group were prepared.

scholarly journals Alkaline Stability of Pure Aliphatic-based Anion Exchange Membranes Containing Cycloaliphatic Quaternary Ammonium Cations

2020 ◽  
Vol 167 (12) ◽  
pp. 124504
Author(s):  
Zhongyang Wang ◽  
Javier Parrondo ◽  
Shrihari Sankarasubramanian ◽  
Kaustava Bhattacharyya ◽  
Manasi Ghosh ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membranes ◽  
Quaternary Ammonium Cations ◽  
Alkaline Stability

scholarly journals Phenolphthalein Anilide Based Poly(Ether Sulfone) Block Copolymers Containing Quaternary Ammonium and Imidazolium Cations: Anion Exchange Membrane Materials for Microbial Fuel Cell

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 454
Author(s):  
Aruna Kumar Mohanty ◽  
Young-eun Song ◽  
Jung-rae Kim ◽  
Nowon Kim ◽  
Hyun-jong Paik
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Good Thermal Stability ◽  
Imidazolium Cations ◽  
Membrane Morphology ◽  
Exchange Membrane

A class of phenolphthalein anilide (PA)-based poly(ether sulfone) multiblock copolymers containing pendant quaternary ammonium (QA) and imidazolium (IM) groups were synthesized and evaluated as anion exchange membrane (AEM) materials. The AEMs were flexible and mechanically strong with good thermal stability. The ionomeric multiblock copolymer AEMs exhibited well-defined hydrophobic/hydrophilic phase-separated morphology in small-angle X-ray scattering and atomic force microscopy. The distinct nanophase separated membrane morphology in the AEMs resulted in higher conductivity (IECw = 1.3–1.5 mequiv./g, σ(OH−) = 30–38 mS/cm at 20 °C), lower water uptake and swelling. Finally, the membranes were compared in terms of microbial fuel cell performances with the commercial cation and anion exchange membranes. The membranes showed a maximum power density of ~310 mW/m2 (at 0.82 A/m2); 1.7 and 2.8 times higher than the Nafion 117 and FAB-PK-130 membranes, respectively. These results demonstrated that the synthesized AEMs were superior to Nafion 117 and FAB-PK-130 membranes.

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