芴
氢氧化物
电导率
膜
电解
离子交换
化学工程
材料科学
离子
高分子化学
无机化学
化学
聚合物
有机化学
电极
复合材料
物理化学
电解质
生物化学
工程类
作者
Hojun Lim,Gyeong Ho Han,Dong Hoon Lee,Giwon Shin,Jinhyuk Choi,Sang Hyun Ahn,Jin Young Park
出处
期刊:Small
[Wiley]
日期:2024-03-18
标识
DOI:10.1002/smll.202400031
摘要
Abstract Improving the hydroxide conductivity and dimensional stability of anion exchange membranes (AEMs) while retaining their high alkaline stability is necessary to realize the commercialization of AEM water electrolysis (AEMWE). A strategy for improving the hydroxide conductivity and dimensional stability of AEMs by inserting fluorine atoms in the core structure of the backbone is reported, which not only reduces the glass transition temperature of the polymer due to steric strain, but also induces distinct phase separation by inducing polarity discrimination to facilitate the formation of ion transport channels. The resulting PFPFTP‐QA AEM with fluorine into the core structure shows high hydroxide conductivity (>159 mS cm −1 at 80 °C), favorable dimensional stability (>25% at 80 °C), and excellent alkaline stability for 1000 h in 2 m KOH solution at 80 °C. Moreover, the PFPFTP‐QA is used to construct an AEMWE cell with a platinum group metal (PGM)–free NiFe anode, which exhibits the current density of 6.86 A cm −2 at 1.9 V at 80 °C, the highest performance in Pt/C cathode and PGM‐free anode reports so far and operates stably for over 100 h at a constant current of 0.5 A cm −2 .
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