| Excellent ion selectivity of Nafion membrane modified by PBI via acid-base pair effect for vanadium flow battery | |
| Zhao, Yingying1,2; Zhang, Denghua1,2; Zhao, Lina1; Wang, Shaoliang1; Liu, Jianguo1; Yan, Chuanwei1 | |
| Corresponding Author | Wang, Shaoliang(wangshaoliang1221@163.com) |
| 2021-10-20 | |
| Source Publication | ELECTROCHIMICA ACTA
 |
| ISSN | 0013-4686 |
| Volume | 394Pages:8 |
| Abstract | 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. |
| Keyword | Acid-base pair effect Membrane Nafion Polybenzimidazole Vanadium flow battery |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1016/j.electacta.2021.139144 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[21975267] |
| WOS Research Area | Electrochemistry |
| WOS Subject | Electrochemistry |
| WOS ID | WOS:000702881200005 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/166742 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Shaoliang |
| Affiliation | 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 |
| Recommended Citation 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. |
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