کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7705386 1497295 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Studies of the methanol crossover and cell performance behaviors of high temperature-direct methanol fuel cells (HT-DMFCs)
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Studies of the methanol crossover and cell performance behaviors of high temperature-direct methanol fuel cells (HT-DMFCs)
چکیده انگلیسی
The high temperature-direct methanol fuel cell (HT-DMFC) based on phosphoric acid (PA)-doped polybenzimidazole (PBI) membranes shows promise as a passive-type DMFC system because it can operate using highly concentrated methanol fuel. In this paper, the methanol crossover and cell performance behaviors of the HT-DMFCs were investigated using a one-dimensional (1-D) HT-DMFC system model that fully accounts for the electrochemical reactions, key species transport and heat generation inside a cell, and the evaporation processes of liquid methanol/water fuel in the evaporator. The model was first validated against experimental HT-DMFC data measured over a wide range of methanol feed concentrations and operating current densities, and operating characteristics of HT-DMFCs were then explored in detail. Particular emphasis was placed on conducting a comparative study of HT-DMFCs with traditional liquid feed low temperature-DMFCs based on perfluorosulfonic acid membranes. The simulation results showed that a HT-DMFC can operate well under highly concentrated methanol fuel above 12 M due to the minimal degree of methanol crossover through the PA-doped PBI membrane.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 30, 26 July 2018, Pages 13999-14011
نویسندگان
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