Bengui Zhang , Xueting Zhang , Qian Liu , Minghui Zhao , Zhirong Yang , Yanshi Fu , Enlei Zhang , Kangjun Wang , Guosheng Wang , Zhigang Zhang , Shouhai Zhang
{"title":"Swelling-induced morpholine functionalized adamantane-containing poly(aryl ether ketone) membranes for vanadium flow batteries","authors":"Bengui Zhang , Xueting Zhang , Qian Liu , Minghui Zhao , Zhirong Yang , Yanshi Fu , Enlei Zhang , Kangjun Wang , Guosheng Wang , Zhigang Zhang , Shouhai Zhang","doi":"10.1016/j.recm.2022.06.003","DOIUrl":null,"url":null,"abstract":"<div><p>Swelling-induced morpholine functionalized adamantane-containing poly(aryl ether ketone) (MAPEK) membranes were prepared for vanadium flow batteries. MAPEK membranes were prepared from chloromethylated polymer and morpholine and further swelling-induced with hot phosphoric acid to obtain membranes with enhanced ionic conductivity. The swelling, selectivity, and ionic conductivity of MAPEK membranes were regulated by varying the swelling temperature. Selective swelling-induced microphase separation in MAPEK membranes, forming wider ion transport pathways and resulting in low area resistance. The unique rigid adamantane-containing backbone limited the swelling of membranes. Consequently, MAPEK membranes showed excellent selectivity and conductivity (vanadium ion permeability coefficient of MAPEK membranes was lower than 3.82 × 0<sup>−7</sup> cm<sup>2</sup>min<sup>−1</sup>) (Nafion212 membrane, 42.5 × 0<sup>−7</sup> cm<sup>2</sup>min<sup>−1</sup>), and MAPEK-150 membrane exhibited low area resistance (0.17 Ωcm<sup>2</sup>). The vanadium flow batteries (VFB) with MAPEK-150 membrane exhibited high energy efficiency (91.1% at 80 mAcm<sup>−2</sup>, 81.4% at 200 mAcm<sup>−2</sup>). Furthermore, MAPEK membranes showed good stability in VFB and oxidative electrolytes. The swelling-induced method utilized in this work is a versatile and facile method to enhance the conductivity of ion-exchange membranes.</p></div>","PeriodicalId":101081,"journal":{"name":"Resources Chemicals and Materials","volume":"1 3","pages":"Pages 268-274"},"PeriodicalIF":0.0000,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277244332200023X/pdfft?md5=88df140c413fdf2f2a36bb5144a8f937&pid=1-s2.0-S277244332200023X-main.pdf","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Resources Chemicals and Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S277244332200023X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Swelling-induced morpholine functionalized adamantane-containing poly(aryl ether ketone) (MAPEK) membranes were prepared for vanadium flow batteries. MAPEK membranes were prepared from chloromethylated polymer and morpholine and further swelling-induced with hot phosphoric acid to obtain membranes with enhanced ionic conductivity. The swelling, selectivity, and ionic conductivity of MAPEK membranes were regulated by varying the swelling temperature. Selective swelling-induced microphase separation in MAPEK membranes, forming wider ion transport pathways and resulting in low area resistance. The unique rigid adamantane-containing backbone limited the swelling of membranes. Consequently, MAPEK membranes showed excellent selectivity and conductivity (vanadium ion permeability coefficient of MAPEK membranes was lower than 3.82 × 0−7 cm2min−1) (Nafion212 membrane, 42.5 × 0−7 cm2min−1), and MAPEK-150 membrane exhibited low area resistance (0.17 Ωcm2). The vanadium flow batteries (VFB) with MAPEK-150 membrane exhibited high energy efficiency (91.1% at 80 mAcm−2, 81.4% at 200 mAcm−2). Furthermore, MAPEK membranes showed good stability in VFB and oxidative electrolytes. The swelling-induced method utilized in this work is a versatile and facile method to enhance the conductivity of ion-exchange membranes.