Experimental verification for simulation study of Pt/CNT nanostructured cathode catalyst layer for PEM fuel cells
Experimental verification for simulation study of Pt/CNT nanostructured cathode catalyst layer for PEM fuel cells
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DOI：
10.1016/j.ijhydene.2012.02.093
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发表时间：
2012-05
影响因子：
7.2
通讯作者：
A. Abedini;B. Dabir;M. Kalbasi
中科院分区：
文献类型：
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作者：
A. Abedini;B. Dabir;M. Kalbasi
本文对质子交换膜(PEM)燃料电池阴极催化层进行了参数研究。稳态、二维(2D)和非等温条件被提出为本质上的功的临界假设。研究中考虑了单胞中的多组分质量扩散和对流机制，质子和电子的传导随实验数据的变化，以及对纳米尺度的模拟任务有重要影响的努森扩散。此外，还深入研究了碳纳米管(CNT)、铂(PT)和Nafion的负载效应以及不同催化层(CL)厚度下单相流中的孔隙率特征。结果表明，铂和碳纳米管的用量比催化剂孔隙率的影响更大。基于所得到的结果，所提出的模型可能是开发和构建纳米结构催化层的一种很有前途的手段。同时，我们改进的聚团模型预测了燃料电池系统在不同实验条件下的性能。
In this study, parametric study on the cathode catalyst layer in a Proton Exchange Membrane (PEM) fuel cell was conducted. Steady-state, two dimensional (2D) and nonisothermal conditions were proposed as critical hypotheses of work in essence. Multi-component mass diffusion along with convection mechanism in a single cell, conduction changes of proton and electron with experimental data and Knudsen diffusion which has a crucial impact on the simulation task in nanoscale, were considered in our study. Moreover, carbon nanotube (CNT), platinum (Pt) and Nafion loading effects as well as the porosity characteristics in a single-phase flow at different catalyst layer (CL) thicknesses were thoroughly investigated. The results presented herein, revealed that the amount of Pt and CNT has more profound effect than catalyst porosity. Based on the results derived, the model presented could be a promising mean to develop and construct a nanostructured catalyst layer. Meanwhile, our modified agglomerate model predicts the performance of fuel cell systems in different experimental conditions.