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学科主题: 物理化学
题名: Influence of Solvent on Polymer Prequaternization toward Anion-Conductive Membrane Fabrication for All-Vanadium Flow Battery
作者: Zhang, Fengxiang1;  Zhang, Huamin1;  Qu, Chao1
通讯作者: 张凤祥 ;  张华民
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2012-08-02
DOI: 10.1021/jp304880r
卷: 116, 期:30, 页:9016-9022
收录类别: SCI
文章类型: Article
部门归属: DNL17
项目归属: DNL17
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Triethylamine- (TEA-) enabled prequaternization of a polymer for nonalkaline anion-exchange membrane (AEM) fabrication is more facile and environmentally benign than the conventional trimethylamine-based postquaternization route. It is also more compatible with forming a microphase-separated membrane morphology that can facilitate ion transport. However, most studies of TEA-quaternized AEMs have reported unsatisfactory conductivities, and no examples of their application in all-vanadium flow batteries (VFBs) have been reported. In this work, we aim to address this issue and demonstrate that, by employing a favorable solvent, polysulfone can be prequaternized to a high level with TEA and further fabricated into an AEM showing good conductivity (18.2 mS cm(-1) at room temperature) and impressive VFB performance (Coulombic efficiency above 98% and energy efficiency above 80% at 80 mA cm(-2)). In contrast, when an unfavorable solvent is used, membrane quaternization does not occur significantly. This contrast is shown to result from the absence or presence of solvent-TEA competition during quaternization, which is related to the the electron-donating or -withdrawing properties of the solvents used. Our study adds new understanding to the quaternization chemistry of AEMs and also represents the first example, to our knowledge, of a TEA-quaternized AEM yielding high VFB efficiencies.
关键词[WOS]: EXCHANGE MEMBRANE ;  FUEL-CELLS ;  CASTING SOLVENT ;  ETHER KETONE) ;  AMINATION ;  DYNAMICS ;  PTFE
语种: 英语
WOS记录号: WOS:000306989800031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/117960
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Energy Storage Batteries & Technol, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, Fengxiang,Zhang, Huamin,Qu, Chao. Influence of Solvent on Polymer Prequaternization toward Anion-Conductive Membrane Fabrication for All-Vanadium Flow Battery[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2012,116(30):9016-9022.
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