Hoshikawa N, Shinohara A, Hosokawa Y, Hasegawa N, Kawasumi M. Synthesis and Properties of Fluorocarbon-Hydrocarbon Hybrid Block Copolymers with Perfluorosulfonimide Acid.
ACS OMEGA 2020;
5:27766-27773. [PMID:
33163759 PMCID:
PMC7643075 DOI:
10.1021/acsomega.0c01972]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
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 × 10-2 S/cm under dry conditions and 25 °C, although soluble in water. The proton conductivity of the block copolymer was 1.7 × 10-3 S/cm at 20% relative humidity and 25 °C, which is three times as high as that of Nafion 112.
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