Mechanism and transfer behavior of ions in Nafion membranes under alkaline media

doi:10.1016/j.memsci.2018.08.057

	Mechanism and transfer behavior of ions in Nafion membranes under alkaline media
	Xu, Wenbin 2,3; Li, Xianfeng 2,3; Hu, Jing 1,2; Zhang, Huamin 2,3; Yuan, Zhizhang 2
刊名	JOURNAL OF MEMBRANE SCIENCE
	2018-11-15
卷号	566 页码:8-14
关键词	Nafion membrane Ion transfer mechanism Density functional theory-based simulation Zinc iron flow battery
ISSN号	0376-7388
DOI	10.1016/j.memsci.2018.08.057
通讯作者	Yuan, Zhizhang(yuanzhizhang@dicp.ac.cn) ; Li, Xianfeng(lixianfeng@dicp.ac.cn)
英文摘要	Nafion series cation exchange membranes are extensively investigated and applied in proton exchange membrane fuel cells and flow battery technologies because of their excellent stability and easy availability. However, a deep understanding of their ions transport mechanism and behavior under the alkaline based flow battery media is very limited. Here, the ion transport mechanism through Nafion membrane under alkaline medium is investigated by small-angle X-ray scattering and atomic force microscope techniques. The results indicate that a membrane showed a higher degree of phase separation and larger cluster radius in a NaOH solution than those in a KOH solution, which endows the membrane with a much higher ion conductivity in the NaOH solution. Density functional theory-based simulation also indicates that the adsorption and desorption between the Na+ and the -SO3- in Nafion is faster than those of K+. Inspired by these results, an alkaline zinc iron flow battery with a Nafion 212 membrane using NaOH as the supporting electrolyte exhibits a coulombic efficiency of similar to 99% and an energy efficiency of similar to 86% at 80 mA cm(-2). This work offers insights into ways to obtain an improved battery performance for the existing as well as the emerging alkaline based flow battery technologies.
资助项目	National Natural Science Foundation of China[21206158] ; Key project of Frontier Science, CAS project[QYZDB-SSW-JSC032] ; DICP QIBEBT[DICP & QIBEBT UN201707]
WOS关键词	REDOX-FLOW BATTERY ; FUEL-CELL ; EXCHANGE MEMBRANES ; ELECTROLYTE ; ENERGY
WOS研究方向	Engineering ; Polymer Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000445152100002
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key project of Frontier Science, CAS project ; Key project of Frontier Science, CAS project ; DICP QIBEBT ; DICP QIBEBT ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key project of Frontier Science, CAS project ; Key project of Frontier Science, CAS project ; DICP QIBEBT ; DICP QIBEBT ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key project of Frontier Science, CAS project ; Key project of Frontier Science, CAS project ; DICP QIBEBT ; DICP QIBEBT ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key project of Frontier Science, CAS project ; Key project of Frontier Science, CAS project ; DICP QIBEBT ; DICP QIBEBT
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/167030]
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
通讯作者	Li, Xianfeng; Yuan, Zhizhang
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, 457 Zhongshan Rd, Dalian 116023, Peoples R China 3.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Xu, Wenbin,Li, Xianfeng,Hu, Jing,et al. Mechanism and transfer behavior of ions in Nafion membranes under alkaline media[J]. JOURNAL OF MEMBRANE SCIENCE,2018,566:8-14.
APA	Xu, Wenbin,Li, Xianfeng,Hu, Jing,Zhang, Huamin,&Yuan, Zhizhang.(2018).Mechanism and transfer behavior of ions in Nafion membranes under alkaline media.JOURNAL OF MEMBRANE SCIENCE,566,8-14.
MLA	Xu, Wenbin,et al."Mechanism and transfer behavior of ions in Nafion membranes under alkaline media".JOURNAL OF MEMBRANE SCIENCE 566(2018):8-14.