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Prepartation and characterization of Imidazolium functionalized long side chain PPO anionic membrane

Authors： GAO Li, YAN Xiaoming, HE Gaohong

Units： State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, LN 116024, China

KeyWords： Anionic membrane; PPO; Imidazolium; Water electrolysis

ClassificationCode：TQ028; TM912.1

year,volume(issue):pagination： 2022,42(6):1-6

Abstract：

Imidazolium-functionalized long side chain PPO membranes (QPPO-PEImOH) was prepared by acylation, condensation, hydroxyl substitution by bromine, and subsequent functionalization. The ion exchange capacity (IEC) determined by back titration was 1.13–1.63 mmol g−1. The swelling ratio and water uptake of QPPO-PEImOH increased with the IEC, while it was insensitive to temperature change. The ionic conductivity of QPPO-PEImOH reached 62 mS cm−1 at 80 °C. In addition, QPPO-PEImOH showed good alkaline stability. The retention of IEC was 93% after immersing in 1 M NaOH for 168 h at 60 oC. The assembled AEM electrolyser achieve a current density of 698 mA/cm2 at 2.0 V and 50 °C under 1 M KOH-fed conditions.

Funds：

国家自然科学基金委创新研究群体项目（22021005）。

AuthorIntro：

高莉（1991-），女，山东淄博，博士研究生，阴离子膜

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