介电谱
质子交换膜燃料电池
电解质
极化(电化学)
电阻抗
分析化学(期刊)
谱线
磷酸
化学
放松(心理学)
材料科学
电化学
膜
物理化学
物理
电极
色谱法
生物化学
量子力学
社会心理学
心理学
有机化学
天文
作者
Alexandra Weiß,Stefan Schindler,Samuele Galbiati,Michael A. Danzer,Roswitha Zeis
标识
DOI:10.1016/j.electacta.2017.02.011
摘要
In this study, Distribution of Relaxation Times (DRT) was successfully demonstrated in the analysis of the impedance spectra of High-Temperature Polymer Electrolyte Membrane Fuel Cells (HT-PEMFC) doped with phosphoric acid. Electrochemical impedance spectroscopy (EIS) was performed and the quality of the recorded spectra was verified by Kramers-Kronig relations. DRT was then applied to the measured spectra and polarization losses were separated on the basis of their typical time constants. The main features of the distribution function were assigned to the cell’s polarization processes by selecting appropriate experimental conditions. DRT can be used to identify individual internal HT-PEMFC fuel cell phenomena without any a-priori knowledge about the physics of the system. This method has the potential to further improve EIS spectra interpretation with either equivalent circuits or physical models.
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