Cross‐linked of poly(biphenyl pyridine) and poly(styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene) grafted with double cations for anion exchange membrane. (10th February 2022)

• Record Type: Journal Article
• Authors: Wang, Fanghui; Cui, Yahui; Sang, Jing; Zhang, Hanfei; Zhu, Hong
• Is Part Of: Electrochimica acta. Volume 405(2022)
• Publication Date: 2022-02-10
• Subjects: Anion exchange membrane -- Fuel cell -- Poly(styrene-b-(ethylene-co-butylene)-b-styrene) -- Poly(biphenyl pyridine) -- Cross-linked membrane; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2021.139770
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: Poly(biphenyl pyridine) and SEBS are cross-linked for the preparation of AEMs. All AEMs have obvious microphase separation morphology. All cross-linked membranes have good mechanical properties and dimensional stability. Abstract: In this study, to solve the problems of insufficient ion conductivity and the excessive swelling ratio of poly(styrene- b -(ethylene- co -butylene)- b -styrene) (SEBS)-based anion exchange membranes (AEMs), poly(biphenyl pyridine) (PBPY) and SEBS grafted with N, N, N, Ν′, N′-pentamethyl-1-amino-6-ammonium iodide (PMAI) were cross-linked to prepare SEBS-PMAI-yPBPY ( y = 0%–20%) AEMs with a controllable cross-linking degree. All AEMs have a good micro-phase separation morphology, where the characteristic domain spacing is 20.94–29.92 nm. Uncross-linked SEBS-PMAI has high OH − conductivity (95.44 mS cm −1 at 80 °C). The conductivity value, water absorption and swelling ratio of cross-linked membranes decrease with the increase in the content of hydrophobic PBPY; however, the mechanical properties and alkaline stability are significantly improved. SEBS-PMAI-15%PBPY, which has high conductivity (75.62 mS cm −1 at 80 °C), low swelling (15.66% at 80 °C) and good mechanical properties, and the maximum power density could reach 226 mW cm −2 at 80 °C. The cross-linking of SEBS and PBPY was conducive to the improvement of the comprehensive performance. The synthesis of the SEBS-PMAI-yPBPY ( y = 0%–20%) membrane provided a new idea for the development of high-performance AEMs. Graphical abstract: Image, graphical abstract