{"title":"Ultrahigh ion selectivity composite membrane contained cationic covalent organic nanosheets for vanadium redox flow battery","authors":"","doi":"10.1016/j.memsci.2024.123314","DOIUrl":null,"url":null,"abstract":"<div><p>Sulfonated poly(ether ether ketone) (SPEEK) is widely explored as the proton exchange membrane (PEM). However, it is difficult for it to have both good proton conductivity and vanadium resistance. Herein, the ionic-covalent organic nanosheets (TpTG<sub>Cl</sub>) were fabricated and added to the SPEEK matrix. The nitrogen-rich and positive charge porous structure of TpTG<sub>Cl</sub> nanosheets endowed the composite membrane with the ability to transfer H<sup>+</sup> and block V<sup>n +</sup> effectively. When the TpTG<sub>Cl</sub> weight proportion was 3 %, the ion selectivity of the SP/TpTG-3 is as high as 103.3 × 10<sup>3</sup> S min cm<sup>−3</sup>. As expected, the SP/TpTG-3 exhibits outstanding energy efficiency (87.0%–77.4 % at 60–180 mA cm<sup>−2</sup>) and long-cycle stability. The results suggested that the ionic-covalent organic nanosheets afforded opportunities to prepare high performance PEM.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":null,"pages":null},"PeriodicalIF":8.4000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0376738824009086/pdfft?md5=e83560138d7750155343e4906a350c9d&pid=1-s2.0-S0376738824009086-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Membrane Science","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0376738824009086","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Sulfonated poly(ether ether ketone) (SPEEK) is widely explored as the proton exchange membrane (PEM). However, it is difficult for it to have both good proton conductivity and vanadium resistance. Herein, the ionic-covalent organic nanosheets (TpTGCl) were fabricated and added to the SPEEK matrix. The nitrogen-rich and positive charge porous structure of TpTGCl nanosheets endowed the composite membrane with the ability to transfer H+ and block Vn + effectively. When the TpTGCl weight proportion was 3 %, the ion selectivity of the SP/TpTG-3 is as high as 103.3 × 103 S min cm−3. As expected, the SP/TpTG-3 exhibits outstanding energy efficiency (87.0%–77.4 % at 60–180 mA cm−2) and long-cycle stability. The results suggested that the ionic-covalent organic nanosheets afforded opportunities to prepare high performance PEM.
期刊介绍:
The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.