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工程坚固的氨酸交叉连接和氨酸覆盖的离子交换膜用于先进的水电解

Guoxiong Deng¹, Yiwen Liao¹, Yakai Lin¹

¹Beijing Key Laboratory for Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.

Angewandte Chemie (International ed. in English)

|August 14, 2024

概括

这项研究引入了水电解剂 (AEMWEs) 的强大的离子交换膜 (AEM),增强了绿色的生产. 新的AEM提供了卓越的机械强度和导电性,提高了AEMWE的稳定性和性能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
化学工程是化学工程的重要组成部分.

背景情况:

阳离子交换膜 (AEM) 对于绿色生产中的水电解剂 (AEMWE) 是至关重要的.
当前的AEMs由于机械强度不佳和低氧化物 (OH-) 导电性而受到影响,限制了AEMWE的稳定性和电流密度.
开发强大的AEM对于推进AEMWE技术至关重要.

研究的目的:

为先进的AEMWEs开发一种具有增强机械强度和导电性的高性能离子交换膜 (AEM).
调查氨酸交叉链接和氨酸封锁在改善AEM属性的有效性.
评估在AEMWEs中开发的AEM的性能.

主要方法:

合成了一种基于多聚烯皮网络的新型AEM.
在AEM结构中纳入了三酸交联和酸封顶.
标志着AEM的机械强度,膨胀率,性稳定性和氧导电性.
使用商业催化剂开发的AEME组装和测试AEMWE.

主要成果:

开发的AEM显示出出色的机械强度 (79.4 MPa) 和低膨胀率 (19.2%).
实现了高氧导电性 (247.2 mS cm-1) 和持久的稳定性 (约5000小时).
配备新AEM的AEMWE在2V时达到电流密度为3.0 A cm−2,在1.6 A cm−2.2时稳定运行了约430小时.

结论:

氨酸交叉连接和氨酸封顶有效地增强了AEM的机械性能和离子导电性.
开发的AEM显著提高了AEMWEs的性能和稳定性.
这项工作为开发用于高效绿色生产的先进AEM提供了有希望的途径.

关键词:

阳离子交换膜的阳离子交换膜性水的电解是性水的电解.非贵金属的催化剂.

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