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	Self-assembled polyelectrolyte multilayer modified Nafion membrane with suppressed vanadium ion crossover for vanadium redox flow batteries
	Xi, Jingyu ; Wu, Zenghua ; Teng, Xiangguo ; Zhao, Yongtao ; Chen, Liquan ; Qiu, Xinping
	2010-05-11 ; 2010-05-11
关键词	METHANOL FUEL-CELLS PROTON-EXCHANGE MEMBRANES PVDF-G-PSSA PHOTOVOLTAIC SYSTEMS ELECTROLYTE MEMBRANE HYBRID MEMBRANE ENERGY ANALYSIS COMPOSITE PERFORMANCE Chemistry, Physical Materials Science, Multidisciplinary
中文摘要	The crossover of vanadium ions through proton-exchange membranes such as those of Nafion is the chief reason that results in the low energy efficiency and high self-discharge rate of vanadium redox flow batteries (VRB). With respect to applicability, the ideal proton-exchange membrane used in VRB should possess simultaneously high proton conductivity and low vanadium ion permeability. Here, we report a novel approach using a polyelectrolyte layer-by-layer self-assembly technique to fabricate a barrier layer onto the surface of Nafion membrane by alternate adsorption of polycation poly(diallyldimethylammonium chloride) (PDDA) and polyanion poly(sodium styrene sulfonate) (PSS), which can suppress the crossover of vanadium ions. The Nafion-[PDDA-PSS](n) membrane (n the number of multilayers) obtained shows much lower vanadium ion permeability compared with plain Nafion membrane. Accordingly, the VRB with Nafion-[PDDA-PSS](n) membrane exhibits a higher coulombic efficiency (CE) and energy efficiency (EE) together with a slower self-discharge rate than that of Nafion system. The highest CE of 97.6% and EE of 83.9% can be achieved at charge-discharge current density of 80 mA cm(-2) and 20 mA cm(-2), respectively.
语种	英语 ; 英语
出版者	ROYAL SOC CHEMISTRY ; CAMBRIDGE ; THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/26420]
专题	清华大学
推荐引用方式 GB/T 7714	Xi, Jingyu,Wu, Zenghua,Teng, Xiangguo,et al. Self-assembled polyelectrolyte multilayer modified Nafion membrane with suppressed vanadium ion crossover for vanadium redox flow batteries[J],2010, 2010.
APA	Xi, Jingyu,Wu, Zenghua,Teng, Xiangguo,Zhao, Yongtao,Chen, Liquan,&Qiu, Xinping.(2010).Self-assembled polyelectrolyte multilayer modified Nafion membrane with suppressed vanadium ion crossover for vanadium redox flow batteries..
MLA	Xi, Jingyu,et al."Self-assembled polyelectrolyte multilayer modified Nafion membrane with suppressed vanadium ion crossover for vanadium redox flow batteries".(2010).

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