气候变化领域集成服务门户(CCPortal): Beneficial use of rotatable-spacer side-chains in alkaline anion exchange membranes for fuel cells

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DOI	10.1039/c8ee02071j
	Beneficial use of rotatable-spacer side-chains in alkaline anion exchange membranes for fuel cells
	Zhu Y.; Ding L.; Liang X.; Shehzad M.A.; Wang L.; Ge X.; He Y.; Wu L.; Varcoe J.R.; Xu T.
发表日期	2018
ISSN	17545692
起始页码	3472
结束页码	3479
卷号	11 期号:12
英文摘要	Side-chain-type polymer architectures have been extensively studied for development of highly conductive fuel cell membranes. However, the commonly used rigid, hydrophobic spacers (between the ionic end-group and polymer backbone) limit self-assembly of ionic side-chains and, therefore, ion transport. Herein, we report a flexible, hydrophilic side-chain-type anion exchange membrane (AEM), where ethylene oxide spacers are incorporated into imidazolium-containing cationic side-chains. AFM and SAXS analysis confirm that the flexible spacers facilitate self-assembly of the ionic side-chains to form continuous conducting channels. Most importantly, both in situ FTIR spectroscopy and molecular dynamic theory simulations indicate that the ethylene oxide spacers are capable of hydrogen bonding to both H2O molecules and hydrated OH- ions. This unique auxiliary function facilitates both ion and H2O transport during fuel cell operation. The resultant AEM exhibits a peak power density of 437 mW cm-2 at 65 °C when tested in a H2/O2 single-cell anion-exchange membrane fuel cell, which is among the highest reported for comparable side-chain-type AEMs. © 2018 The Royal Society of Chemistry.
英文关键词	Ethylene; Fourier transform infrared spectroscopy; Hydrogen bonds; Ion exchange membranes; Ions; Molecular dynamics; Self assembly; Alkaline anion exchange membrane; Anion exchange membranes (AEM); Anion-exchange membrane fuel cells; Auxiliary functions; Conducting channels; Fuel cell operation; Peak power densities; Polymer architecture; Alkaline fuel cells; alkalinity; chemical bonding; ethylene; FTIR spectroscopy; fuel cell; hydrogen; ion exchange; membrane; polymer
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190056
作者单位	CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei, 230026, China; Department of Chemistry, University of Surrey, Guildford Surrey, GU2 7XH, United Kingdom
推荐引用方式 GB/T 7714	Zhu Y.,Ding L.,Liang X.,et al. Beneficial use of rotatable-spacer side-chains in alkaline anion exchange membranes for fuel cells[J],2018,11(12).
APA	Zhu Y..,Ding L..,Liang X..,Shehzad M.A..,Wang L..,...&Xu T..(2018).Beneficial use of rotatable-spacer side-chains in alkaline anion exchange membranes for fuel cells.Energy & Environmental Science,11(12).
MLA	Zhu Y.,et al."Beneficial use of rotatable-spacer side-chains in alkaline anion exchange membranes for fuel cells".Energy & Environmental Science 11.12(2018).