Highly conductive and durable poly(arylene ether sulfone) anion exchange membrane with end-group cross-linking
- Title
- Highly conductive and durable poly(arylene ether sulfone) anion exchange membrane with end-group cross-linking
- Author
- 이영무
- Keywords
- FUEL-CELL APPLICATIONS; POLYMER ELECTROLYTE MEMBRANES; TEMPERATURE; PERFORMANCE; STABILITY; TRANSPORT; GAS
- Issue Date
- 2017-01
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE, v. 10, no. 1, page. 275-285
- Abstract
- Here, we demonstrate the improved electrochemical performance and stability of end-group cross-linked anion exchange membranes (AEM) for the first time via the introduction of imidazolium groups in poly(arylene ether sulfone) (Imd-PAES). A novel feature of the cross-linking reaction is that basic additives are not required to prevent gelation with the cationic functional groups. In this work, the sodium salt of 3-hydroxyphenylacetylene acted directly as the end-group cross-linker, and it was cross-linked by thermal treatment at 180 degrees C. The gel fraction and hydroxide conductivity of the cross-linked membranes (XE-Imds) depended on the cross-linking temperature and time. The prepared XE-Imd70 (70 refers to the degree of functionalization) membranes with an ion exchange capacity (IEC) of 2.2 meq g(-1) achieved a high hydroxide conductivity (107 mS cm(-1)). This material also showed good single cell performance (XE-Imd70: 202 mA cm(-2) at 0.6 V and a maximum power density of 196.1 mW cm(-2)) at 80 degrees C, 100% relative humidity (RH), and improved durability and alkaline stability. The excellent hydroxide conductivity and electrochemical performance of XE-Imd70 was due to the fact that the ion cluster size of XE-Imd membranes was larger (12.1-14 nm) than that of E-Imd (5.5-8.14 nm), indicating that XE-Imd membranes have a closely associated ion-clustered morphology, which was confirmed by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS) measurements.
- URI
- https://pubs.rsc.org/en/content/articlelanding/2017/EE/C6EE03079C#!divAbstracthttps://repository.hanyang.ac.kr/handle/20.500.11754/112351
- ISSN
- 1754-5692; 1754-5706
- DOI
- 10.1039/c6ee03079c
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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