电气喷涂多孔电极对水电解性能和稳定性的影响
Jong Yoon Lee1,2, Hee-Young Park3, Sang Youp Hwang1
1Department of Energy Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea.
ACS applied materials & interfaces
|April 11, 2025
概括
在质子交换膜水电解 (PEMWE) 中优化电极多孔性显著提高了绿色生产效率. 这项研究表明,通过控制电极结构,提高催化剂层功能,性能提高了60%.
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
- 可持续能源 可持续能源
背景情况:
- 质子交换膜水电解 (PEMWE) 对于绿色生产至关重要.
- 由于三相共存和泡形成,催化剂层中的质量运输限制阻碍了PEMWE的效率.
- 膜电极组件 (MEA) 特别容易被气泡关闭.
研究的目的:
- 为了研究电极多孔结构对PEMWE在高电流密度下生产的效率的影响.
- 了解孔隙性如何影响催化剂层内的质量传输限制.
- 通过控制毛孔度和粘合剂含量来优化MEA性能.
主要方法:
- 使用电喷涂方法,将商用氧化 (IrO2) 催化剂直接涂在膜上.
- 使用带电催化剂粒子之间的静电排斥来形成多孔电极.
- 实施一个受孔度控制的技术,以系统地改变电极结构.
- 分析粘合剂含量对MEA疏水性和接触电阻的影响.
主要成果:
- 取得了卓越的PEMWE性能:在2.0V时达到5.3A cm-2和在1.8V时达到3.2A cm-2,超过了目前公布的记录.
- 通过使用简单的孔隙性控制技术,在PEMWE中证明了超过60%的性能改善.
- 证实,最佳的粘合剂含量会对MEA的疏水性产生积极影响,并降低接触电阻.
结论:
- 控制电极多孔性是一种非常有效的策略,可以克服PEMWE中的大规模运输限制.
- 开发的电喷涂方法和孔径控制技术为高效的绿色生产提供了新的途径.
- 这项关于电极多孔性的系统研究为高性能PEMWE系统的进步铺平了道路.
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