Preparation of partially fluorinated block-type anion exchange membranes |
Authors: WU Hongyue, YANG qian, ZHANG Qiugen, ZHU Aimei, LIU Qinglin |
Units: The College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China |
KeyWords: Partially fluorinated; Block type; Anion exchange membrane; Fuel cells |
ClassificationCode:TQ 028.8 |
year,volume(issue):pagination: 2020,40(4):1-8 |
Abstract: |
The preparation of anion exchange membranes with good alkali stability and high ionic conductivity is the focus of current research. In this work, tri-block polymers were synthesized by using fluorinated aromatic blocks grafted with α, α'-dibromo-p-xylene as macromolecular initiators to initiate the polymerization of olefins at the end of chains. Subsequently, a quaternized side chain was grafted on the aliphatic block for functionalization to prepare partially fluorinated block-type anion exchange membranes. The characterization shows that significant microphase separation structures are formed in the membranes, due to the difference in hydrophilicity and hydrophobicity between the blocks. Among them, the membrane FPAE-PVBC-QA-20 (IEC = 1.51 mmol/g) has an ionic conductivity of 87.8 mS/cm at 80 ° C. Moreover, it retains 74.5% of initial ionic conductivity after being immersed in a 2 M NaOH solution at 80 ° C for 500 h and exhibits good alkali resistance. The power density of single cell reaches 131.7 mW/cm2. |
Funds: |
国家自然基金面上项目(21878252 & 21736009) |
AuthorIntro: |
第一作者简介:吴虹月(1995-),女,福建省南平市人,在读硕士研究生,主要从事功能膜材料的制备 通讯作者简介:刘庆林,Email:qlliu@xmu.edu.cn |
Reference: |
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