AI Article Synopsis
- Researchers developed a new type of block copolymer electrolyte combining a hydrophilic perfluorinated segment (poly(perfluoropropyl sulfonimide)) and a hydrophobic hydrocarbon segment (poly(ether ether sulfone)).
- The sulfonimide group in the electrolyte exhibits superacidity with a low equivalent weight, resulting in a high proton conductivity of 1.2 × 10 S/cm in dry conditions at 25 °C.
- At 20% relative humidity, the block copolymer achieved a proton conductivity of 1.7 × 10 S/cm, outperforming the well-known Nafion 112 by a factor of three.
Article Abstract
Novel fluorocarbon-hydrocarbon hybrid block copolymer electrolytes were synthesized. The block copolymer electrolytes consist of poly(perfluoropropyl sulfonimide) (PC3SI) as a perfluorinated hydrophilic segment and poly(ether ether sulfone) as a hydrocarbon hydrophobic segment. The sulfonimide group of poly(perfluoropropyl sulfonimide) has superacidity, very low equivalent weight (EW = 293 g/equiv), and a proton conductivity of 1.2 × 10 S/cm under dry conditions and 25 °C, although soluble in water. The proton conductivity of the block copolymer was 1.7 × 10 S/cm at 20% relative humidity and 25 °C, which is three times as high as that of Nafion 112.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7643075 | PMC |
| http://dx.doi.org/10.1021/acsomega.0c01972 | DOI Listing |
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