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- Title
Highly Dispersed CeO x Hybrid Nanoparticles for Perfluorinated Sulfonic Acid Ionomer–Poly(tetrafluoethylene) Reinforced Membranes with Improved Service Life.
- Authors
Ahn, Juhee; Ali, Mobina Irshad; Lim, Jun Hyun; Park, Yejun; Park, In Kee; Duchesne, Denis; Chen, Lisa; Kim, Juyoung; Lee, Chang Hyun; Kim, Dukjoon
- Abstract
CeOx hybrid nanoparticles were synthesized and evaluated for use as radical scavengers, in place of commercially available Ce(NO3)3 and CeO2 nanoparticles, to avoid deterioration of the initial electrochemical performance and/or spontaneous aggregation/precipitation issues encountered in polymer electrolyte membranes. When CeOx hybrid nanoparticles were used for membrane formation, the resulting membranes exhibited improved proton conductivity (improvement level = 2–15% at 30–90 °C), and thereby electrochemical single cell performance, because the –OH groups on the hybrid nanoparticles acted as proton conductors. In spite of a small amount (i.e., 1.7 mg/cm3) of introduction, their antioxidant effect was sufficient enough to alleviate the radical-induced decomposition of perfluorinated sulfonic acid ionomer under a Fenton test condition and to extend the chemical durability of the resulting reinforced membranes under fuel cell operating conditions.
- Subjects
IONOMERS; SERVICE life; SULFONIC acids; SOLID state proton conductors; POLYMERIC membranes; POLYELECTROLYTES; ELECTRIC batteries
- Publication
Membranes, 2021, Vol 11, Issue 2, p143
- ISSN
2077-0375
- Publication type
Article
- DOI
10.3390/membranes11020143