Novel self-cross-linked multi-imidazolium cations long flexible side chains triblock copolymer anion exchange membrane based on ROMP-type polybenzonorbornadiene

被引：40
作者：
Cheng, Changwen [1 ]
He, Xiaohui [1 ]
Huang, Shengmei [1 ,3 ]
Zhang, Feng [1 ]
Guo, Yan [1 ]
Wen, Yufei [1 ]
Wu, Bin [1 ]
Chen, Defu [2 ]
机构：
[1] Nanchang Univ, Sch Mat Sci & Engn, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China
[2] Nanchang Univ, Sch Civil Engn & Architecture, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China
[3] Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Jiangxi, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 38期
基金：
中国国家自然科学基金;
关键词：
Polybenzonorbornadiene; Multi-imidazolium cations side-chains; Self-cross-link structure; Triblock copolymer; H-2/O-2 fuel cells; ETHER SULFONE); POLYMER ELECTROLYTES; NORBORNENE COPOLYMER; QUATERNARY AMMONIUM; ALKALINE STABILITY; ION CONDUCTIVITY; FUEL-CELLS; DEGRADATION; PERFORMANCE; SUBSTITUENTS;
D O I：
10.1016/j.ijhydene.2020.04.276
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel benzonorbornadiene derivative (BenzoNBD-Bis(Im(+)Br(-)-Im(+)I(-))) grafted by multi-imidazolium cations side-chains combined the rigid alkyl spacer and flexible alkoxy spacer is designed and synthesized. Then, the BenzoNBD-Bis(Im(+)Br(-)-Im(+)I(-)) monomer is copolymerized with the epoxy functionalized norbomene monomer (NB-MGE) and norbornene (NB) via ring-opening metathesis polymerization (ROMP) using Grubbs 3rd catalyst. All as-designed triblock copolymer membranes (TBCMs) show a thermal decomposition temperature beyond 310 degrees C and can well be dissolved in common organic solvents. The self-cross-linked structure of anion exchange membrane (AEM) is confirmed by gel fraction and tensile measurement. The water uptake and swelling ratio of TBCMs and AEMs are also measured. Major properties required for AEMs such as ion exchange capacity (IEC), hydroxide conductivity and alkaline stability are investigated. AEM-9.09 shows a hydroxide conductivity of 100.74 mS cm(-1) at 80 degrees C. Besides, the micro-phase separated morphology of AEM is confirmed by TEM, AFM and SAXS analyses, AEMs formed distinct micro-phase separation. The as-prepared AEM exhibits peak power density of 174.5 mW cm(-2) at 365.1 mA cm(-2) tested in a H-2/O-2 single-cell anion exchange membrane fuel cell (AEMFC) at 60 degrees C. The newly developed strategy of self-cross-linked multi-imidazolium cations long side-chains triblock benzonorbornadiene copolymer provides an effective method to develop high-performance AEMs. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
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页码：19676 / 19690
页数：15
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