Covalent triazine frameworks crosslinked microporous polymer membranes with fast and selective ion transport for ultra-stable vanadium redox flow batteries
文献类型：期刊论文
| 作者 | Qi, Meijuan1,2; Yan, Hui1; Wei, Wei1; Tang, Ao1 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 497页码:10 |
| 关键词 | Covalent triazine frameworks SOPBI membrane Ionic channel Ion-selectivity Vanadium flow battery |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2024.155068 |
| 通讯作者 | Wei, Wei(weiwei@imr.ac.cn) ; Tang, Ao(a.tang@imr.ac.cn) |
| 英文摘要 | The vanadium redox flow batteries (VRFBs) are an essential pathway to long-duration energy storage with the merits of power and energy decoupling, long lifetime and safety. However, low coulombic efficiency stemming from vanadium crossover across the membrane together with notable ohmic loss originated from low proton conductivity of the membrane still limits high performance operation of the VRFBs. Herein, we proposed 2,2 ' bipyridine-based covalent triazine frameworks (bipCTF) crosslinked sulfonated-poly (4,4 '-diphenylether-5,5 ' bibenzimidazole) (SOPBI) (bipCTF/SP-100) for use as the membrane in VRFBs, which synergistically prevents vanadium crossover and enhances proton conductivity. By delicately tuning the sulfonation degree and properly incorporate bipCTF, the bipCTF/SP-100 membrane is successfully synthesized based on OPBI polymers, which delivers a reduced area resistance of 0.3 Omega cm2 and a low VO2+ permeability of 19.05 x 10-9 cm2 s- 1, affording an excellent trade-off between proton conductivity and ion selectivity. Theoretical calculation further corroborates that the high proton conductivity of bipCTF/SP-100 is attributed to the ionic channels formed by bipCTF, while the superior ion selectivity is assigned to protonated imidazole and pyridine. Benefiting from microporous bipCTF/SP-100 membrane, the VRFB exhibits a high CE of 99.8 % and an excellent EE of 78.3 % at 250 mA cm- 2 and meanwhile yields a high capacity retention of 94.8 % after 200 cycles at 200 mA cm- 2, which shows enormous potential for high power density operation of the VRFBs. |
| 资助项目 | National Key R & D Pro-gram of China[2022YFB2404901] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001301721100001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Key R & D Pro-gram of China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wei, Wei; Tang, Ao |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215123, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi, Meijuan,Yan, Hui,Wei, Wei,et al. Covalent triazine frameworks crosslinked microporous polymer membranes with fast and selective ion transport for ultra-stable vanadium redox flow batteries[J]. CHEMICAL ENGINEERING JOURNAL,2024,497:10. |
| APA | Qi, Meijuan,Yan, Hui,Wei, Wei,&Tang, Ao.(2024).Covalent triazine frameworks crosslinked microporous polymer membranes with fast and selective ion transport for ultra-stable vanadium redox flow batteries.CHEMICAL ENGINEERING JOURNAL,497,10. |
| MLA | Qi, Meijuan,et al."Covalent triazine frameworks crosslinked microporous polymer membranes with fast and selective ion transport for ultra-stable vanadium redox flow batteries".CHEMICAL ENGINEERING JOURNAL 497(2024):10. |
入库方式： OAI收割
来源：金属研究所
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