Polarization analysis of a micro direct methanol fuel cell stack based on Debye-Hückel ionic atmosphere theory
作者： Yun Wang , Zhi Zhong , Shuo Fang , Chunhui Zhao , Yuntao Liu
DOI: 10.1016/J.ENERGY.2021.119907
关键词:
摘要: Abstract In this paper, a micro direct methanol fuel cell (μDMFC) stack model is developed in order to analyze the polarization characteristics. The employed Debye-Huckel ionic atmosphere theory describe charge conductions and electrochemical kinetics during coupling. simulated current-power profiles of are verified experimentally. Compared with μDMFC based on conventional theory, error proposed reduces by about 8% at average. For every 10 mol · m−3 increase cathodic oxygen concentration, coupling efficiency alone can improve output power 2% operating temperature from 293 K 333 K weakens forces within stack. analyzing results dynamic operation show that causes voltage peak unloading. High loading current unloading speed raise peak. energy loss caused crossover decreases process. conversion relatively high. solves problem makes it possible between modern microelectronic portable systems.
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