Polybenzimidazole membranes functionalised with 1-methyl-2-mesitylbenzimidazolium ions via a hexyl linker for use in vanadium flow batteries
- Authors
- Lee, Yona; Kim, Sangwon; Maljusch, Artjom; Conradi, Oliver; Kim, Hyoung-Juhn; Jang, Jong Hyun; Han, Jonghee; Kim, Jihyun; Henkensmeier, Dirk
- Issue Date
- 12-6월-2019
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Vanadium redox flow battery (VRFB); Polybenzimidazole; 2-Mesityl benzimidazolium
- Citation
- POLYMER, v.174, pp.210 - 217
- Indexed
- SCIE
SCOPUS
- Journal Title
- POLYMER
- Volume
- 174
- Start Page
- 210
- End Page
- 217
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/64779
- DOI
- 10.1016/j.polymer.2019.04.048
- ISSN
- 0032-3861
- Abstract
- 1-(6-bromohexyl)-3-methyl-2-(2,4,6-trimethylphenyl)-2H-benzimidazolium bromide was synthesised and grafted onto polybenzimidazole (PBI). The highest obtained degrees of functionalisation were 0.7 and 1.1 ionic groups per repeat unit, corresponding to ion exchange capacities of 1.25 and 1.55 mmol chloride/g. While the latter material had much reduced tensile strength and Young's modulus, the material with a lower degree of functionalisation showed properties similar to PBI and was therefore further investigated. X-ray scattering showed that the functional group reduced the crystallinity. Conductivity was in the range of 2-3 mS cm(-1,) but increased to 23 mS cm(-1) after doping in 2 M sulfuric acid, 2-4 times higher than for doped PBI. Permeability for VO2+ ions was 0.8 x 10(-12) m(2) s(-1). In the vanadium redox flow battery, the grafted PBI showed higher coulomb and voltage efficiency than PBI, and therefore also higher energy efficiency.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.