南方科技大学知识苑(SUSTech KC): A Nafion/polybenzimidazole composite membrane with consecutive proton-conducting pathways for aqueous redox flow batteries

题名	A Nafion/polybenzimidazole composite membrane with consecutive proton-conducting pathways for aqueous redox flow batteries
作者	Wan, Y. H.1; Sun, J.1; Jian, Q. P.1; Fan, X. Z.1; Zhao, T. S.1,2
通讯作者	Fan, X. Z.; Zhao, T. S.
发表日期	2022-05-01
DOI	10.1039/d2ta01746f
发表期刊	Journal of Materials Chemistry A 影响因子和分区
ISSN	2050-7488
EISSN	2050-7496
卷号	10页码:13021-13030
摘要	Nafion membranes are extensively used in aqueous redox flow batteries due to their high proton conductivity and excellent chemical stability, but their low ion selectivity and high cost restrict the further development of flow batteries. Here we demonstrate a composite membrane consisting of electrospun Nafion nanofibers embedded in a polybenzimidazole (PBI) matrix. The interconnected Nafion nanofibers act as consecutive proton-conducting pathways, allowing a high proton conductivity with low Nafion content, while the highly selective PBI matrix suppresses the crossover of redox species, ensuring a high ion selectivity. Moreover, the acid-base interactions between the Nafion and PBI along with the rigid nature of PBI offer excellent mechanical stability. The resultant membrane with only 40 wt% Nafion exhibits 58-fold improvement in blocking vanadium permeation and a nearly 60% retention in proton conductivity compared with the Nafion 212 membrane. More notably, the optimal membrane enables a vanadium redox flow battery to obtain a coulombic efficiency of 99.8% and an energy efficiency (EE) of 80.0% at a high current density of 210 mA cm(-2), exceeding that with the Nafion 212 membrane (EE similar to 77.2%). This work presents a new approach for developing efficient and affordable membranes for aqueous redox flow batteries.
相关链接	[来源记录]
收录类别	SCI ; EI
语种	英语
学校署名	通讯
资助项目	Research Grants Council of the Hong Kong Special Administrative Region, China[T23-601/17-R] ; Shenzhen-Hong Kong-Macao Science and Technology Program (Category C)[SGDX2020110309460000] ; Natural Science Foundation of Guangdong Province[2021A1515011821]
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000807565700001
出版者	ROYAL SOC CHEMISTRY
EI入藏号	20222412225371
EI主题词	Chemical stability ; Composite membranes ; Energy efficiency ; Mechanical stability ; Nanofibers ; Proton conductivity ; Vanadium
EI分类号	Energy Conservation:525.2 ; Vanadium and Alloys:543.6 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Nanotechnology:761 ; Chemistry:801 ; Solid State Physics:933
来源库	Web of Science
引用统计	被引频次[WOS]：19
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/336144
专题	工学院_机械与能源工程系
作者单位	1.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China 2.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
通讯作者单位	机械与能源工程系
推荐引用方式 GB/T 7714	Wan, Y. H.,Sun, J.,Jian, Q. P.,et al. A Nafion/polybenzimidazole composite membrane with consecutive proton-conducting pathways for aqueous redox flow batteries[J]. Journal of Materials Chemistry A,2022,10:13021-13030.
APA	Wan, Y. H.,Sun, J.,Jian, Q. P.,Fan, X. Z.,&Zhao, T. S..(2022).A Nafion/polybenzimidazole composite membrane with consecutive proton-conducting pathways for aqueous redox flow batteries.Journal of Materials Chemistry A,10,13021-13030.
MLA	Wan, Y. H.,et al."A Nafion/polybenzimidazole composite membrane with consecutive proton-conducting pathways for aqueous redox flow batteries".Journal of Materials Chemistry A 10(2022):13021-13030.