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在微孔层中精确设计的水友网络,用于高性能的质子交换膜燃料电池

Yue Zhang¹, Shunbo Lan¹, Mingyu Lou¹

¹School of Automotive Studies, Tongji University, Shanghai 201804, China.

ACS applied materials & interfaces

|January 20, 2025

概括

优化交膜燃料电池 (PEMFCs) 中的微孔层 (MPL) 使用水友性纳米孔可增强水管理. 这种设计可以提高各种湿度水平的性能,这对于车辆动力应用至关重要.

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:

质子交换膜燃料电池 (PEMFC) 是未来汽车动力的关键.
微孔层 (MPL) 对于PEMFC中有效的水资源管理至关重要.
优化MPL孔隙结构对于提高燃料电池性能至关重要.

研究的目的:

研究MPL中工程化水友性孔隙网络对PEMFC性能的影响.
确定火山碳黑 (VB) 在制造水友孔中的作用.
优化MPL设计,以改善水管理和在不同湿度下耐用性.

主要方法:

使用不同度的火山碳黑 (VB) 制造MPL,以创建水友的纳米和巨孔网络.
测量内部接触角,以评估孔水友性.
在不同的相对湿度 (RH) 条件下,使用修改的MPL测试PEMFC的性能测试.
三维模拟建模以阐明MPL内的水运输机制.

主要成果:

使用10%VB (P1-H) 的MPL样本表现出卓越的性能,在60%RH时达到1.51W/cm2的峰值功率密度,在80%RH时最小下降.
水友性纳米孔作为水库,确保膜水化和控制滴滴大小.
水友性巨孔导致膜脱水,尽管改善了空气透性.
在高电流密度下,P1-H表现出较低的欧姆电阻和质量转移电阻.

结论:

在MPL中设计的性纳米孔网络对于高效的水资源管理和高PEMFC性能至关重要.
火山碳黑有效地促进了水友性毛孔的形成.
精确的MPL设计,特别是性纳米孔的结合,为开发高性能,适应湿度的汽车燃料电池提供了战略.

关键词:

水友网络的水友网络.微孔层是一种微孔层.孔径大小设计孔径大小设计质子交换膜燃料电池的燃料电池是什么水资源管理水资源管理

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