期刊
APPLIED ENERGY
卷 215, 期 -, 页码 338-347出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2018.02.002
关键词
Proton exchange membrane fuel cell; Hydrogen crossover current; Short-circuit resistance; Linear sweep voltammetry; Galvanostatic charge method; Mass spectrometry
资金
- National Key Research and Development Program of China [2017YFB0102705, 2016YFB0101305, 2016YFB0101208]
- National Natural Science Foundation of China [21676158, 21376138]
- Tsinghua University Initiative Scientific Research Program [20141081237]
Hydrogen crossover current has a great influence on the performance and durability of proton exchange membrane (PEM) fuel cells. The common measuring method is linear sweep voltammetry (LSV). But some usual approximations, such as ignoring the influence of scan rates or short-circuit resistances, can lead to greater measurement deviations. Therefore, in this study to accurately measure hydrogen crossover current, LSV is improved by building a novel charging model based on fitted zero scan rate curves and on taking effects of short circuit into consideration. On the basis of this new model, galvanostatic charging method is improved by taking short circuit of PEMs into consideration and a mass spectrometry assisted with hydrogen pump is proposed with no need of calibration with standard gas. Hydrogen crossover current and short-circuit resistance of a 34 cm(2) single cell are measured by three improved methods, which are then compared with methods previously available. It is found that hydrogen crossover currents are reduced and more accurate than those obtained by previous methods, and values obtained by different improved methods are highly consistent with each other. So the proposed charging model is valid and can be used to optimize other electrochemical measurements of fuel cells.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据