کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7712332 | 1497421 | 2016 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Membrane polarization in mixed-conducting ceramic fuel cells and electrolyzers
ترجمه فارسی عنوان
قطبش غشاء در سلول های سرامیکی مخلوط و الکترولیزرها
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
This paper focuses on modeling membrane-polarization processes within mixed-conducting electrolyte membranes. Because a complete set of thermodynamic and transport properties is available, the electrolyte material used for the study is a yttrium-doped barium zirconate (BaZr0.9 Y0.1 O3âδ, BZY10). Unlike Polymer Electrolyte Fuel Cells (PEMFC) and Solid-Oxide Fuel Cells (SOFC), the open-circuit voltage cannot be evaluated using gas-phase compositions alone. Using a Nernst-Planck-Poisson (NPP) model, an important aspect of the present paper is to develop the theory needed to evaluate open-circuit potential. Focusing on the mixed-conducting membrane alone, the present model neglects all activation and concentration overpotentials. The model is exercised in both fuel-cell and electrolyzer modes, revealing significantly different polarization behaviors. The model-based results show how the membrane polarization depends upon operating conditions, including temperature and gas-phase compositions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 4, 30 January 2016, Pages 2931-2943
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 4, 30 January 2016, Pages 2931-2943
نویسندگان
Huayang Zhu, Robert J. Kee,