Novel Quaternary Ammonium-Functionalized Covalent Organic Frameworks/Poly(2,6-dimethyl-1,4-phenylene oxide) Hybrid Anion Exchange Membranes with Enhanced Ion Conductivity and Stability

2020 ◽  
Vol 12 (13) ◽  
pp. 15138-15144 ◽  
Author(s):  
Jia Chen ◽  
Mingming Guan ◽  
Kai Li ◽  
Shaokun Tang
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Ion Conductivity ◽  
Anion Exchange Membranes ◽  
Covalent Organic Frameworks ◽  
Phenylene Oxide

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 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.

Crosslinking of comb-shaped polymer anion exchange membranes via thiol–ene click chemistry

2016 ◽  
Vol 7 (14) ◽  
pp. 2464-2475 ◽  
Author(s):  
Liang Zhu ◽  
Tawanda J. Zimudzi ◽  
Nanwen Li ◽  
Jing Pan ◽  
Bencai Lin ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Ion Exchange ◽  
Click Chemistry ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Polymer Electrolytes ◽  
Anion Exchange Membranes ◽  
Alkaline Fuel Cell ◽  
Phenylene Oxide ◽  
Durable Polymer

To produce anion conductive and durable polymer electrolytes for alkaline fuel cell applications, a series of cross-linked quaternary ammonium functionalized poly(2,6-dimethyl-1,4-phenylene oxide)s with mass-based ion exchange capacities (IEC) ranging from 1.80 to 2.55 mmol g−1 were synthesized via thiol–ene click chemistry.

scholarly journals Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications

Membranes ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 306
Author(s):  
Seunghyun Lee ◽  
Hyejin Lee ◽  
Tae-Hyun Yang ◽  
Byungchan Bae ◽  
Nguyen Anh Thu Tran ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Polymer Electrolyte Membranes ◽  
Ion Conductivity ◽  
Anion Exchange Membranes ◽  
Menshutkin Reaction ◽  
Electrolyte Membranes ◽  
Polymer Dispersions ◽  
Exchange Membrane ◽  
Sulfonyl Fluoride

Perfluorinated polymers are widely used in polymer electrolyte membranes because of their excellent ion conductivity, which are attributed to the well-defined morphologies resulting from their extremely hydrophobic main-chains and flexible hydrophilic side-chains. Perfluorinated polymers containing quaternary ammonium groups were prepared from Nafion- and Aquivion-based sulfonyl fluoride precursors by the Menshutkin reaction to give anion exchange membranes. Perfluorinated polymers tend to exhibit poor solubility in organic solvents; however, clear polymer dispersions and transparent membranes were successfully prepared using N-methyl-2-pyrrolidone at high temperatures and pressures. Both perfluorinated polymer-based membranes exhibited distinct hydrophilic-hydrophobic phase-separated morphologies, resulting in high ion conductivity despite their low ion exchange capacities and limited water uptake properties. Moreover, it was found that the capacitive deionization performances and stabilities of the perfluorinated polymer membranes were superior to those of the commercial Fumatech membrane.

Tuning the properties of poly(2,6-dimethyl-1,4-phenylene oxide) anion exchange membranes and their performance in H2/O2 fuel cells

2018 ◽  
Vol 11 (2) ◽  
pp. 435-446 ◽  
Author(s):  
Lei Liu ◽  
Xiaomeng Chu ◽  
Jiayou Liao ◽  
Yingda Huang ◽  
Ying Li ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Cell Performance ◽  
Anion Exchange Membranes ◽  
Fuel Cell Performance ◽  
Phenylene Oxide ◽  
Complete Investigation

A complete investigation of poly(2,6-dimethyl-1,4-phenylene) AEMs with different quaternary ammonium groups is provided comparing the properties and fuel cell performance.

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