Effect of Ionomer/Carbon Ratio and Catalytic Layer Thickness on the Operation of PEM Single Cells

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

Fuel Cells Pub Date : 2024-07-26 DOI:10.1002/fuce.202200194

Leandro González Rodríguez, Rocío Andújar Lapeña, Roberto Campana Prada, Gema Sevilla Toboso, Margarita Sánchez Molina

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引用次数: 0

Abstract

The electrochemical operation of membrane electrode assemblies (MEAs) with different Nafion/C composition (0%, 20%, 30%, 40%, and 50%) and the same ultralow platinum load (0.02 mg_Pt cm⁻²) has been investigated. The electrodes were manufactured by depositing the catalytic ink, prepared with catalyst HiSPEC9100, onto the gas diffusion layers by wet powder spraying. MEA with 30% Nafion/C reached the highest power density (675 mW cm⁻²) and the lowest mass of Pt per power (0.059 g_Pt kW⁻¹) under H₂/O₂ 2 bar gauge pressure, the last quotient being 1.7 time less than USDRIVE objective for 2025. The electrochemical functioning of current membrane-electrode setups is compared with an analogous series with thicker electrode catalytic layer prepared with a commercial catalyst with a lower percent of Pt/C. Scanning electron microscopy characterization analysis of catalytic layers prepared by wet spraying exhibited an ionomer homogeneous network.

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离子膜/碳比例和催化层厚度对 PEM 单电池运行的影响

研究了不同 Nafion/C成分（0%、20%、30%、40%和 50%）和相同超低铂负载（0.02 mgPt cm-2）的膜电极组件（MEA）的电化学操作。电极是通过湿粉末喷涂将催化剂 HiSPEC9100 制备的催化墨水沉积在气体扩散层上制成的。在 H2/O2 2 bar 表压下，含 30% Nafion/C 的 MEA 达到了最高的功率密度（675 mW cm-2）和最低的单位功率铂质量（0.059 gPt kW-1），最后一个商数比 2025 年 USDRIVE 目标低 1.7 倍。将当前膜电极装置的电化学功能与使用含 Pt/C 百分比较低的商用催化剂制备的较厚电极催化层的类似系列进行了比较。对湿喷法制备的催化层进行的扫描电子显微镜特性分析表明，该催化层具有离子聚合物均质网络。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.