期刊
CHEMICAL ENGINEERING JOURNAL
卷 406, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.126889
关键词
PEM fuel cell; Graded design; Platinum loading; Temperature; Segmented cell
资金
- National Natural Science Foundation of China [21522603, 21878129, 21978118]
- Excellent Youth Foundation of Jiangsu Scientific Committee [BK20140011]
- Natural Science Foundation of Jiangsu province of China [BK20170530]
- start-up funding for young researchers of Jiangsu University [16JDG061]
- Innovation and Creation program of Jiangsu province of China [2016-32]
- project STIM-REI - European Union through the European Regional Development Fund - the Operational Programme Competitiveness and Cohesion 2014-2020 [KK.01.1.1.01.0003, KK.01.1.1.01]
The use of a systematic design of gradients in platinum loading and temperature distribution can improve cell performance, save platinum usage, and maintain current density homogeneity in PEM fuel cells.
Desired electrochemical reaction and mass transport rates vary in the operation of PEM fuel cells due to the inhomogeneous spatial distribution of reactants and products. A segmented fuel cell unit was manufactured and a comprehensive model was developed to study the effect of the graded distributions of platinum loading and operating temperature, to simultaneously save the usage of platinum, improve the cell performance and maintain the homogeneity of current density. The increase of temperature towards the cathode outlet improved the reaction kinetics and reduced the liquid water content along the gas flow direction, which decreased the required platinum loading. A large temperature gradient may lead to membrane/ionomer dehydration and oxygen starvation near the cathode outlet due to the increase in the saturation pressure of vapor and the dilution of the increased vapor content. A systematical design of the gradients of platinum loading and temperature achieved an improved cell performance and saved the usage of Pt-based catalysts without worsening the homogeneity of current density.
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