Hydrophilic poly(vinylidene fluoride) porous membrane with well connected ion transport networks for vanadium flow battery

	Hydrophilic poly(vinylidene fluoride) porous membrane with well connected ion transport networks for vanadium flow battery
	Cao, Jingyu 1,3; Yuan, Zhizhang 1,3; Li, Xianfeng 1,2; Xu, Wanxing 1,3; Zhang, Huamin 1,2
刊名	journal of power sources
	2015-12-01
卷号	298 页码:228-235
关键词	Vanadium flow battery Poly(vinylidene fluoride) membrane Hydrophilicity modification Cross-linking and grafting
英文摘要	hydrophilic poly(vinylidene fluoride) (pvdf) porous membranes are facilely fabricated via grafting polymerization and cross-linking reaction for vanadium flow battery (vfb) application. a solvent swelling pre-treatment is specifically carried out to introduce hydrophilic groups in the pores and on the surface, where they can form well connected ion transport networks. the modification is performed through chemical cross-linking and grafting of pvp by using potassium persulfate (k2s2o8) as a radical initiator. the effect of reaction condition on membrane morphology, hydrophilicity is characterized in detail. meanwhile, the performance of modified membranes is detected in vfb single cell at a current density of 80 ma cm(-2). it is found that more pvp is immobilized on membrane surface and in the pores with prolonging reaction time. consequently, the membrane wetability and effective pore size change dramatically, resulting better hydrophilicity and higher ion selectivity. as a result, the vfbs assembled with these modified membranes show higher ce and overall better ee than unmodified ones. the optimized membrane shows ce of 94.4% and ee of 83.3%, which is comparable to commercial nafion 115. furthermore, the prepared hydrophilic pvdf membranes demonstrate excellent chemical stability through the long-term battery operation, showing great prospects in vfb applications. (c) 2015 elsevier b.v. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	electrochemistry ; energy & fuels
研究领域[WOS]	electrochemistry ; energy & fuels
关键词[WOS]	anion-exchange membranes ; energy-storage ; ether ketone) ; solubility parameters ; tio2 nanoparticles ; pvdf membranes ; single-step ; performance ; progress ; polymerization
收录类别	SCI
语种	英语
WOS记录号	WOS:000362146800028
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/146575]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian 116023, Peoples R China 2.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Cao, Jingyu,Yuan, Zhizhang,Li, Xianfeng,et al. Hydrophilic poly(vinylidene fluoride) porous membrane with well connected ion transport networks for vanadium flow battery[J]. journal of power sources,2015,298:228-235.
APA	Cao, Jingyu,Yuan, Zhizhang,Li, Xianfeng,Xu, Wanxing,&Zhang, Huamin.(2015).Hydrophilic poly(vinylidene fluoride) porous membrane with well connected ion transport networks for vanadium flow battery.journal of power sources,298,228-235.
MLA	Cao, Jingyu,et al."Hydrophilic poly(vinylidene fluoride) porous membrane with well connected ion transport networks for vanadium flow battery".journal of power sources 298(2015):228-235.