Oriented Proton-Conductive Nanochannels Boosting a Highly Conductive Proton-Exchange Membrane for a Vanadium Redox Flow Battery

doi:10.1021/acsami.0c20847

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	Oriented Proton-Conductive Nanochannels Boosting a Highly Conductive Proton-Exchange Membrane for a Vanadium Redox Flow Battery
	Zhang, Denghua 1,2; Xu, Zeyu 1,2; Zhang, Xihao 1,2; Zhao, Lina 1; Zhao, Yingying 1,2; Wang, Shaoliang 1,2; Liu, Weihua 1; Che, Xuefu 3; Yang, Jingshuai 3; Liu, Jianguo 1
刊名	ACS APPLIED MATERIALS & INTERFACES
	2021-01-27
卷号	13 期号:3 页码:4051-4061
关键词	sulfonated poly (ether ether ketone) vanadium redox flow battery proton-conductive membrane oriented nanochannel acid-base pair
ISSN号	1944-8244
DOI	10.1021/acsami.0c20847
通讯作者	Liu, Jianguo(jgliu@imr.ac.cn)
英文摘要	In this work, we propose a sulfonated poly (ether ether ketone) (SPEEK) composite proton-conductive membrane based on a 3-(1-hydro-imidazolium-3-yl)-propane- 1 -sulfonate (Him-pS) additive to break through the trade-off between conductivity and selectivity of a vanadium redox flow battery (VRFB). Specifically, Him-pS enables an oriented distribution of the SPEEK matrix to construct highly conductive proton nanochannels throughout the membrane arising from the noncovalent interaction. Moreover, the "acid-base pair" effect from an imidazolium group and a sulfonic group further facilitates the proton transport through the nanochannels. Meanwhile, the structure of the acid-base pair is further confirmed based on density functional theory calculations. Material and electrochemical characterizations indicate that the nanochannels with a size of 16.5 nm are vertically distributed across the membrane, which not only accelerate proton conductivity (31.54 mS cm(-1)) but also enhance the vanadium-ion selectivity (39.9 x 10(3) S min cm(-3)). Benefiting from such oriented proton-conductive nanochannels in the membrane, the cell delivers an excellent Coulombic efficiency (CE, approximate to 98.8%) and energy efficiency (EE, approximate to 78.5%) at 300 mA cm(-2 ). More significantly, the cell maintains a stable energy efficiency over 600 charge-discharge cycles with only a 5.18% decay. Accordingly, this work provides a promising fabrication strategy for a high-performance membrane of VRFB.
资助项目	National Nature Science Foundation of China[21975267] ; Shenyang key R&D and technology transfer program[Z17-7-026]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000614062400052
资助机构	National Nature Science Foundation of China ; Shenyang key R&D and technology transfer program
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/161448]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Jianguo
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 3.Northeastern Univ, Coll Sci, Dept Chem, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Denghua,Xu, Zeyu,Zhang, Xihao,et al. Oriented Proton-Conductive Nanochannels Boosting a Highly Conductive Proton-Exchange Membrane for a Vanadium Redox Flow Battery[J]. ACS APPLIED MATERIALS & INTERFACES,2021,13(3):4051-4061.
APA	Zhang, Denghua.,Xu, Zeyu.,Zhang, Xihao.,Zhao, Lina.,Zhao, Yingying.,...&Yan, Chuanwei.(2021).Oriented Proton-Conductive Nanochannels Boosting a Highly Conductive Proton-Exchange Membrane for a Vanadium Redox Flow Battery.ACS APPLIED MATERIALS & INTERFACES,13(3),4051-4061.
MLA	Zhang, Denghua,et al."Oriented Proton-Conductive Nanochannels Boosting a Highly Conductive Proton-Exchange Membrane for a Vanadium Redox Flow Battery".ACS APPLIED MATERIALS & INTERFACES 13.3(2021):4051-4061.