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聚合物基架诱导的广泛的键网络:在阴极催化剂/离子体接口中实现高质子和氧气的运输

Lin Fang¹, Junlang Huo¹, Yangyang Chen²

¹School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Fuel Cell Technology, South China University of Technology, Guangzhou 510641, China.

ACS applied materials & interfaces

|February 28, 2025

概括

一个新的功能化的聚合物支架通过优化离子体分布来提高质子交换膜燃料电池 (PEMFC) 的性能. 这种键策略增强了质子和气体运输,提高了功率密度,降低了电阻.

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
化学工程是化学工程的重要组成部分.

背景情况:

质子交换膜燃料电池 (PEMFC) 面临着在催化剂层中离子体分布不均的挑战,阻碍了质子和氧气的运输,特别是在低负载的情况下.
优化离子体覆盖面对于提高燃料电池效率和耐用性至关重要.

研究的目的:

设计和建造一个功能化的聚合物支架,使用氧二聚胺醇 (PyOHPBI) 来改善PEMFC催化剂层中的离子体分布.
研究一种键协同作用的战略,以提高质子和气体的运输.

主要方法:

使用氧胺聚胺醇 (PyOHPBI) 进行脚手架建设,利用丰富的键位.
集成的分子动力学模拟用于设计优化.
采用现场和现场表征技术来分析催化剂层特性和燃料电池性能.

主要成果:

与商业Pt/C催化剂相比,达到144.4%的峰值功率密度增加.
在膜电极组件 (MEAs) 中表现出极低的局部氧气传输阻力 (7.81 s·m−1).
通过通过结通过碳支持的表面化学修饰成功优化了离子体覆盖.

结论:

开发的键协同效应战略通过改善离子体分布和传输特性,显著提高了PEMFC的性能.
使用键对碳支物的表面修改为开发更高效和可持续的燃料电池技术提供了一种可行的方法.

关键词:

碳支持碳支持催化剂层的接口催化剂层的接口离子体的分布离子体分布键是一种键.大众运输是大众运输.质子交换膜燃料电池的燃料电池是什么

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