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对CCM和CCS膜电极组件的比较研究,用于具有CsH的高温质子交换膜燃料电池

Yizhe Li¹, Zhiyong Fu², Yifan Li²

¹Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China.

Materials (Basel, Switzerland)

|June 10, 2023

概括

与催化剂涂层基板 (CCS) 方法相比,催化剂涂层膜 (CCM) 方法提高了高温质子交换膜燃料电池 (HT-PEMFC) 的性能. 这种CCM方法,使用CsH5(PO4) 2-合PBI膜,产生更高的峰值功率密度和更低的电阻.

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
能源转换能源转换

背景情况:

膜电极组件 (MEAs) 对于高温质子交换膜燃料电池 (HT-PEMFC) 的性能至关重要.
传统的MEA制造方法包括催化剂涂层膜 (CCM) 和催化剂涂层基板 (CCS).
用酸合的聚胺醇 (PBI) 膜对CCM制造构成了挑战,原因是胀和湿问题.

研究的目的:

使用CCM和CCS方法制造的MEAs的性能与一种新的CsH5(PO4) 2合PBI膜进行比较.
评估膜特性对MEA制造和电化学性能的影响.
调查加湿气体条件对MEA性能的影响.

主要方法:

使用CCM和CCS方法制造MEAs,使用CsH5(PO4) 2合PBI膜.
在不同温度下对MEA进行电化学性能测试.
在加湿气体条件下分析MEA性能.
电化学阻抗光谱 (EIS) 用于评估电阻.

主要成果:

在所有测试温度中,CCM制造的MEA表现出比CCS制造的MEA更高的峰值功率密度.
加湿气体条件导致MEA两种类型的峰值功率密度提高,这是由于电解质膜导电率的增加.
在200°C时,CCM-MEA实现了647mW cm-2的峰值功率密度,比CCS-MEA高约16%.
在CCM-MEA中,EIS揭示了较低的欧姆电阻,表明上层膜-催化剂层接触.

结论:

在制造含有CsH5(PO4) 2合PBI膜的MEAs时,CCM方法具有优势,性能优于CCS方法.
改进的膜特性 (干燥表面,低胀) 促进CCM制造,提高燃料电池性能.
优化MEA设计和膜选择对于推进HT-PEMFC技术至关重要.

关键词:

催化剂涂层膜 (CCM) 是一种膜电极组件 (MEA) 是一种聚合物电解质膜燃料电池 (PEMFC) 是一种燃料电池.

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