Excellent ion selectivity of Nafion membrane modified by PBI via acid-base pair effect for vanadium flow battery

doi:10.1016/j.electacta.2021.139144

IMR OpenIR

	Excellent ion selectivity of Nafion membrane modified by PBI via acid-base pair effect for vanadium flow battery
	Zhao, Yingying 1,2; Zhang, Denghua 1,2; Zhao, Lina 1; Wang, Shaoliang 1; Liu, Jianguo 1; Yan, Chuanwei 1
通讯作者	Wang, Shaoliang(wangshaoliang1221@163.com)
	2021-10-20
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
卷号	394 页码:8
摘要	As the key material of Vanadium flow battery (VFB), the properties of ion exchange membrane limit the battery performance and cost of VFB to some extent. Nafion membrane of Dupont, one of the most employed membranes in VFB, is also exposed to some issues such as high cost and low ion selectivity. To improve ion selectivity of Nafion membrane, polybenzimidazole (PBI), functional groups of which can be ionized to a positive charge and prevent vanadium ions from crossing the membrane, is introduced to prepare reinforced Nafion membrane (Nafion/PBI membrane). By this way, excellent conductivity and vanadium ion selectivity of Nafion membrane are optimized via the "acid-base pair" effect. Furthermore, a series of PBI contents have been optimized and the battery with Nafion/PBI membrane of 1 wt% PBI exhibits excellent performance (coulombic efficiency: 97.72%, energy efficiency: 81.31% at 200 mA cm(-2)). In the long-term cycles, higher capacity retention and superior stability of the battery with Nafion/PBI membrane (1 wt% PBI) are delivered than Nafion 212 membrane. Thus, Nafion/PBI membrane is indeed a promising candidate to promote the whole properties of VFB by surmounting the trade-off between proton conductivity and vanadium ion permeability. (C) 2021 Elsevier Ltd. All rights reserved.
关键词	Acid-base pair effect Membrane Nafion Polybenzimidazole Vanadium flow battery
资助者	National Natural Science Foundation of China
DOI	10.1016/j.electacta.2021.139144
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[21975267]
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000702881200005
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/166742
专题	中国科学院金属研究所
通讯作者	Wang, Shaoliang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yingying,Zhang, Denghua,Zhao, Lina,et al. Excellent ion selectivity of Nafion membrane modified by PBI via acid-base pair effect for vanadium flow battery[J]. ELECTROCHIMICA ACTA,2021,394:8.
APA	Zhao, Yingying,Zhang, Denghua,Zhao, Lina,Wang, Shaoliang,Liu, Jianguo,&Yan, Chuanwei.(2021).Excellent ion selectivity of Nafion membrane modified by PBI via acid-base pair effect for vanadium flow battery.ELECTROCHIMICA ACTA,394,8.
MLA	Zhao, Yingying,et al."Excellent ion selectivity of Nafion membrane modified by PBI via acid-base pair effect for vanadium flow battery".ELECTROCHIMICA ACTA 394(2021):8.