Sulfonated Polybenzothiazoles Containing Hexafluoroisopropyl Units for Proton Exchange Membrane Fuel Cells
- Authors
- Wang, Gang; Yang, Shuai; Kang, Na Yoon; Hua, Bingyan; Lu, Mingxia; Wei, Hongliang; Kang, Jiaqi; Tang, Wenshuai; Lee, Young Moo
- Issue Date
- Jul-2023
- Publisher
- AMER CHEMICAL SOC
- Citation
- MACROMOLECULES, v.56, no.14, pp.5546 - 5556
- Indexed
- SCIE
SCOPUS
- Journal Title
- MACROMOLECULES
- Volume
- 56
- Number
- 14
- Start Page
- 5546
- End Page
- 5556
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/192999
- DOI
- 10.1021/acs.macromol.3c00301
- ISSN
- 0024-9297
- Abstract
- A sulfonated dicarboxylic monomer containing hexafluoroisopropyl,i.e., 3,3 & PRIME;-disulfonate-2,2-bis(4-carboxyphenyl)hexafluoropropane(SCFA), was prepared via sulfonation and oxidation to synthesize novelsulfonated polybenzothiazoles (sPBT-F) through polycondensation of2,2-bis(4-carboxyphenyl)hexafluoropropane (CFA), SCFA, and 2,5-diamino-1,4-benzenedithioldihydrochloride (DABDT). These sPBT-F series polymers exhibited excellentsolubility due to the incorporation of a flexible hexafluoroisopropylgroup. Meanwhile, the sPBT-F series polymers displayed high thermalstability and were used to prepare tough and soft membranes by solutioncasting. Interestingly, sPBT-F series membranes exhibited excellentwater uptake and low swelling ratio, indicating excellent dimensionalstability. AFM images displayed a region of obvious separation oflight/dark phases, indicating high proton conductivity of sPBT-F seriesmembranes. The sPBT-F82.5 membrane with a high degree of sulfonationdemonstrated a conductivity of 0.14 S cm(-1) at 80 & DEG;C and 100% RH, superior to the results of Nafion 117. Furthermore,the sPBT-F82.5 membrane displayed a maximum power density of 344.33mW cm(-2) and superb durability at a current densityof 0.2 A cm(-2) for 20 h. In summary, the sPBT-F polymersare potential matrix materials for PEMs.
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