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基于基的微孔离子交换膜用于水电解

Wenhao Zou^1,2, Gonggen Tang^1,2, Kang Peng^1,2

¹State Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.

Angewandte Chemie (International ed. in English)

|September 15, 2025

概括

具有分支,微孔结构的新型离子交换膜 (AEM) 显著改善了离子交换膜水电解 (AEMWE) 的性稳定性和导电性. 这使得高效,可持续的绿色能生产成为可能.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
绿色能源绿色能源

背景情况:

离子交换膜水电解 (AEMWE) 是绿色生产的关键技术.
目前的AEMs受到有限的氧导电性和低性稳定性的影响,阻碍了AEMWE的性能.
开发强大的AEM对于推进AEMWE技术至关重要.

研究的目的:

设计和合成基于核的新型离子交换膜 (AEM),提高性稳定性和氧导电性.
研究这些AEM的结构-属性关系,重点关注分支和微孔架构.
评估这些AEM在AEMWE系统中的性能,以实现高效的绿色生产.

主要方法:

一系列基于基的AEMs的合成,具有不同的分支和微孔结构.
AEM属性的表征,包括氧导电性,性稳定性 (例如,在10M NaOH中在80°C下3100小时),和离子扩散.
使用优化的PTPQ-Trip膜和合金催化剂在各种条件下制造和测试AEMWE电池 (例如,5M KOH,2.8A cm-2在2.0V,在0.5A cm-2连续运行1200小时).

主要成果:

在3100小时后在10M NaOH中在80°C下保持99.95%的氧化导电性,达到优异的性稳定性.
通过调整分支单元的刚性来设计微孔,从而使PTPQ-Trip膜中的氧化物扩散系数增加了1.6倍.
经过验证的稳定的AEMWE运行,在5M KOH中在2.0V下提供2.8 A cm-2和在0.5 A cm-2下连续运行超过1200小时,具有停止/启动周期.
在波动的电流密度和电解质温度下,AEMWE系统在1400小时内表现稳定.

结论:

抗的微孔AEM对于高性能AEMWE至关重要.
开发的基于基的PTPQ-Trip膜为绿色生产提供了卓越的稳定性和导电性.
这项工作验证了AEMWE在利用可再生电力为可持续气生产的适应性.

关键词:

性的稳定性性的稳定性阳离子交换膜的阳离子交换膜扩散系数扩散系数奎努克利迪尼姆 (quinuclidinium) 是一种类物质.水的电解是水的电解.

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