کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6605888 | 459522 | 2016 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Role of the microporous layer in the redistribution of phosphoric acid in high temperature PEM fuel cell gas diffusion electrodes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Role of the microporous layer in the redistribution of phosphoric acid in high temperature PEM fuel cell gas diffusion electrodes Role of the microporous layer in the redistribution of phosphoric acid in high temperature PEM fuel cell gas diffusion electrodes](/preview/png/6605888.png)
چکیده انگلیسی
In this work, pore network modelling was used to investigate the role of the microporous layer (MPL) in the redistribution of phosphoric acid (PA) in a high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) gas diffusion electrode (GDE). A HT-PEMFC GDE composed of a catalyst layer (sprayed in-house), MPL, and fibrous substrate was assembled, and its three-dimensional (3D) geometry was imaged using synchrotron X-ray microcomputed tomography. The spatial distribution of pore spaces and their connections were identified based on the 3D geometry, and an equivalent pore network of the GDE was obtained for simulating the PA transport with an invasion percolation algorithm. The predicted mass redistribution of PA in the GDE was found to be in excellent agreement with experimental values reported in the literature. The presence of the MPL was found to encourage the redistribution of PA within the CL and inhibited PA leaching toward the channel. To the authors' best knowledge, this study is the first numerical simulation of PA transport in a HT-PEMFC GDE.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 212, 10 September 2016, Pages 187-194
Journal: Electrochimica Acta - Volume 212, 10 September 2016, Pages 187-194
نویسندگان
S. Chevalier, M. Fazeli, F. Mack, S. Galbiati, I. Manke, A. Bazylak, R. Zeis,