稳定的离子交换膜轴承化用于高性能水电解
Liqiang Yin1, Rong Ren1, Lanlan He1
1Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou, 310030, Zhejiang Province, China.
Angewandte Chemie (International ed. in English)
|March 19, 2024
概括
新的离子交换膜 (AEMs) 使用稳定的二基核单元,在性条件下增强耐用性. 这些膜提高了水电解仪的性能和寿命.
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
- 聚合物化学 聚合物化学
背景情况:
- 离子交换膜 (AEM) 对于离子交换膜水电解器 (AEM-WE) 是至关重要的.
- 四级氨离子的稳定性是AEM的一个主要挑战,特别是在恶劣的性条件和高温下.
- 现有的AEM由于离子体退化而遭受性能和耐用性问题.
研究的目的:
- 综合和描述新的AEM,以提高AEM-WE的稳定性和性能.
- 为了研究新的四级氨基离子的降解机制和性稳定性.
- 评估开发的AEM在非贵金属AEM-WEs中的性能.
主要方法:
- 一个1-甲基-3,3-二基因核分子构建单元的合成.
- 密度函数理论 (DFT) 计算和加速衰老分析以研究稳定性.
- 通过酸催化Friedel-Crafts聚合,制备有分支的聚 (?? 烯) (PAQ-x) AEMs.
- 现场性稳定性测试和膜特性 (膨胀,吸水,离子导电性) 的表征.
- 使用开发的PAQ-5膜制造和测试AEM-WE.
主要成果:
- 合成的二四核单元表现出高稳定性,SN2机制主导降解.
- 分支PAQ-x AEM证明了可控制的分子量和可调节的离子交换能力 (IEC).
- PAQ-x膜显示出出色的ex situ性稳定性,减少胀,以及尺寸稳定性和离子导电性之间的良好平衡.
- 基于PAQ-5的AEM-WE在2V时实现了8Acm-2的高电流密度,并保持了超过2446小时的稳定性.
结论:
- 烯基核部分为AEM提供了优越的性稳定性.
- 在PAQ-x AEM中分支聚合物架构增强了尺寸稳定性和离子导电性.
- 开发的PAQ-x AEM显示出对高性能和耐用的AEM-WEs的重大承诺.
- 稳定的二基基团是性环境的能量转换装置中先进聚合物的通用构件.
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